J/ApJ/789/147Star formation histories of LG dwarf galaxies (Weisz+, 2014)

The star formation histories of local group dwarf galaxies. I. Hubble Space Telescope/Wide Field Planetary Camera 2 observations. Weisz D.R., Dolphin A.E., Skillman E.D., Holtzman J., Gilbert K.M., Dalcanton J.J., Williams B.F. <Astrophys. J., 789, 147 (2014)> =2014ApJ...789..147W (SIMBAD/NED BibCode)ADC_Keywords: Galaxy catalogs ; Models, evolutionary ; Galaxies, nearbyKeywords: galaxies: dwarf - galaxies: evolution - galaxies: formation - galaxies: stellar content - Local GroupAbstract: We present uniformly measured star formation histories (SFHs) of 40 Local Group (LG) dwarf galaxies based on color-magnitude diagram (CMD) analysis from archival Hubble Space Telescope imaging. We demonstrate that accurate SFHs can be recovered from CMDs that do not reach the oldest main sequence turn-off (MSTO), but emphasize that the oldest MSTO is critical for precisely constraining the earliest epochs of star formation. We find that: (1) the average lifetime SFHs of dwarf spheroidals (dSphs) can be approximated by an exponentially declining SFH with τ ∼ 5 Gyr; (2) lower luminosity dSphs are less likely to have extended SFHs than more luminous dSphs; (3) the average SFHs of dwarf irregulars (dIrrs), transition dwarfs, and dwarf ellipticals can be approximated by the combination of an exponentially declining SFH (τ ∼ 3-4 Gyr) for lookback ages >10-12 Gyr ago and a constant SFH thereafter; (4) the observed fraction of stellar mass formed prior to z = 2 ranges considerably (80% for galaxies with M < 10^{5}M_{☉}to 30% for galaxies with M > 10^{7}M_{☉}) and is largely explained by environment; (5) the distinction between "ultra-faint" and "classical" dSphs is arbitrary; (6) LG dIrrs formed a significantly higher fraction of stellar mass prior to z = 2 than the Sloan Digital Sky Survey galaxies from Leitner and the SFHs from the abundance matching models of Behroozi et al. This may indicate higher than expected star formation efficiencies at early times in low mass galaxies. Finally, we provide all the SFHs in tabulated electronic format for use by the community.Description: For this paper, we have selected only dwarf galaxies that are located within the zero surface velocity of the LG (∼1 Mpc; e.g., van den Bergh 2000, The Galaxies of the Local Group (Cambridge: Cambridge Univ. Press) ; McConnachie 2012, J/AJ/144/4). This definition excludes some dwarfs that have been historically associated with the LG, such as GR8 and IC 5152, but which are located well beyond 1 Mpc. We have chosen to include two galaxies with WFPC2 imaging that are located on the periphery of the LG (Sex A and Sex B), because of their ambiguous association with the LG, the NGC 3109 sub-group, or perhaps neither (although see Bellazzini et al. 2013A&A...559L..11B for discussion of the possible association of these systems). We measured the SFH of each field using the maximum likelihood CMD fitting routine, MATCH (Dolphin 2002MNRAS.332...91D). Briefly, MATCH works as follows: it accepts a range of input parameters (e.g., initial mass function (IMF) slope, binary fraction, age and metallicity bin widths, etc.), uses these parameters to construct synthetic CMDs of simple stellar populations (SSPs), and then linearly combines them with a model foreground CMD to form a composite model CMD with a complex SFH. The composite model CMD is then convolved with the noise model from the artificial star tests (i.e., completeness, photometric uncertainties, and color/magnitude biases). The resulting model CMD is then compared to the observed CMD using a Poisson likelihood statistic.File Summary:

FileName Lrecl Records Explanations

ReadMe 80 . This file table2.dat 97 53 Observational Properties of the WFPC2 Archival Data table5.dat 1284 53 Star Formation Histories of each WFPC2 Field table6.dat 1284 10 Total Star Formation Histories of Galaxies with Multiple Fields

See also: J/AJ/144/4 : Properties of dwarf galaxies in the Local Group (McConnachie+, 2012) J/AJ/146/46 : Star Formation Rate in nearby galaxies (Karachentsev+, 2013)Byte-by-byte Description of file: table2.dat

Bytes Format Units Label Explanations

1- 17 A17 --- ID Galaxy identifier 19- 24 A6 --- Field Field identifier 26- 27 I2 h RAh Right ascension (J2000) 29- 30 I2 min RAm Right ascension (J2000) 32- 33 I2 s RAs Right ascension (J2000) 35 A1 --- DE- Declination sign (J2000) 36- 37 I2 deg DEd Declination (J2000) 39- 40 I2 arcmin DEm Declination (J2000) 42- 43 I2 arcsec DEs Declination (J2000) 45- 49 I5 --- HST-PID Unique HST field identifier 51- 55 A5 --- Filt1 First HST filter 57- 61 A5 --- Filt2 Second HST filter 63- 67 I5 s Tint1 Intergation time for Filt1 69- 73 I5 s Tint2 Intergation time for Filt2 75- 78 F4.1 mag Cmag1 Completeness apparent magnitude limit for Filt1 80- 83 F4.1 mag Cmag2 Completeness apparent magnitude limit for Filt2 85- 87 F3.1 --- Cfrac1 Completeness fraction for Filt1 (1) 89- 91 F3.1 --- Cfrac2 Completeness fraction for Filt2 (1) 93- 97 I5 --- Nstars Number of stars

Note (1): completeness fraction at the adopted faint photometric limit of our CMDs as listed in columns Cmag1 and Cmag2.

Byte-by-byte Description of file: table5.dat table6.dat

Bytes Format Units Label Explanations

1- 17 A17 --- ID Galaxy identifier 19- 24 A6 --- Field Field identifier 26- 31 F6.3 10+6Msun TMass Total mass formed (1) 33- 38 F6.3 10+6Msun UrTMass Random uncertainty 84th percentile in TMass 40- 45 F6.3 10+6Msun UtTMass Total uncertainty 84th percentile in TMass 47- 52 F6.3 10+6Msun LrTMass Random uncertainty 16th percentile in TMass 54- 59 F6.3 10+6Msun LtTMass Total uncertainty 16th percentile in TMass 61- 64 F4.2 --- f10.1 Mass fraction formed prior to log(t) = 10.1 from best fit SFH (2) 66- 69 F4.2 --- Urf10.1 Random uncertainty 84th percentile in f10.1 71- 74 F4.2 --- Utf10.1 Total uncertainty 84th percentile in f10.1 76- 79 F4.2 --- Lrf10.1 Random uncertainty 16th percentile in f10.1 81- 84 F4.2 --- Ltf10.1 Total uncertainty 16th percentile in f10.1 86- 89 F4.2 --- f10.05 Mass fraction formed prior to log(t) = 10.05 from best fit SFH (2) 91- 94 F4.2 --- Urf10.05 Random uncertainty 84th percentile in f10.05 96- 99 F4.2 --- Utf10.05 Total uncertainty 84th percentile in f10.05 101-104 F4.2 --- Lrf10.05 Random uncertainty 16th percentile in f10.05 106-109 F4.2 --- Ltf10.05 Total uncertainty 16th percentile in f10.05 111-114 F4.2 --- f10.0 Mass fraction formed prior to log(t) = 10.0 from best fit SFH (2) 116-119 F4.2 --- Urf10.0 Random uncertainty 84th percentile in f10.0 121-124 F4.2 --- Utf10.0 Total uncertainty 84th percentile in f10.0 126-129 F4.2 --- Lrf10.0 Random uncertainty 16th percentile in f10.0 131-134 F4.2 --- Ltf10.0 Total uncertainty 16th percentile in f10.0 136-139 F4.2 --- f9.95 Mass fraction formed prior to log(t) = 9.95 from best fit SFH (2) 141-144 F4.2 --- Urf9.95 Random uncertainty 84th percentile in f9.95 146-149 F4.2 --- Ur9.95 Total uncertainty 84th percentile in f9.95 151-154 F4.2 --- Lrf9.95 Random uncertainty 16th percentile in f9.95 156-159 F4.2 --- Ltf9.95 Total uncertainty 16th percentile in f9.95 161-164 F4.2 --- f9.9 Mass fraction formed prior to log(t) = 9.95 from best fit SFH (2) 166-169 F4.2 --- Urf9.9 Random uncertainty 84th percentile in f9.9 171-174 F4.2 --- Ur9.9 Total uncertainty 84th percentile in f9.9 176-179 F4.2 --- Lrf9.9 Random uncertainty 16th percentile in f9.9 181-184 F4.2 --- Ltf9.9 Total uncertainty 16th percentile in f9.9 186-189 F4.2 --- f9.85 Mass fraction formed prior to log(t) = 9.85 from best fit SFH (2) 191-194 F4.2 --- Urf9.85 Random uncertainty 84th percentile in f9.85 196-199 F4.2 --- Ur9.85 Total uncertainty 84th percentile in f9.85 201-204 F4.2 --- Lrf9.85 Random uncertainty 16th percentile in f9.85 206-209 F4.2 --- Ltf9.85 Total uncertainty 16th percentile in f9.85 211-214 F4.2 --- f9.8 Mass fraction formed prior to log(t) = 9.8 from best fit SFH (2) 216-219 F4.2 --- Urf9.8 Random uncertainty 84th percentile in f9.8 221-224 F4.2 --- Ur9.8 Total uncertainty 84th percentile in f9.8 226-229 F4.2 --- Lrf9.8 Random uncertainty 16th percentile in f9.8 231-234 F4.2 --- Ltf9.8 Total uncertainty 16th percentile in f9.8 236-239 F4.2 --- f9.75 Mass fraction formed prior to log(t) = 9.75 from best fit SFH (2) 241-244 F4.2 --- Urf9.75 Random uncertainty 84th percentile in f9.75 246-249 F4.2 --- Ut9.75 Total uncertainty 84th percentile in f9.75 251-254 F4.2 --- Lrf9.75 Random uncertainty 16th percentile in f9.75 256-259 F4.2 --- Ltf9.75 Total uncertainty 16th percentile in f9.75 261-264 F4.2 --- f9.7 Mass fraction formed prior to log(t) = 9.7 from best fit SFH (2) 266-269 F4.2 --- Urf9.7 Random uncertainty 84th percentile in f9.7 271-274 F4.2 --- Ut9.7 Total uncertainty 84th percentile in f9.7 276-279 F4.2 --- Lrf9.7 Random uncertainty 16th percentile in f9.7 281-284 F4.2 --- Ltf9.7 Total uncertainty 16th percentile in f9.7 286-289 F4.2 --- f9.65 Mass fraction formed prior to log(t) = 9.65 from best fit SFH (2) 291-294 F4.2 --- Urf9.65 Random uncertainty 84th percentile in f9.65 296-299 F4.2 --- Ut9.65 Total uncertainty 84th percentile in f9.65 301-304 F4.2 --- Lrf9.65 Random uncertainty 16th percentile in f9.65 306-309 F4.2 --- Ltf9.65 Total uncertainty 16th percentile in f9.65 311-314 F4.2 --- f9.6 Mass fraction formed prior to log(t) = 9.6 from best fit SFH (2) 316-319 F4.2 --- Urf9.6 Random uncertainty 84th percentile in f9.6 321-324 F4.2 --- Ut9.6 Total uncertainty 84th percentile in f9.6 326-329 F4.2 --- Lrf9.6 Random uncertainty 16th percentile in f9.6 331-334 F4.2 --- Ltf9.6 Total uncertainty 16th percentile in f9.6 336-339 F4.2 --- f9.55 Mass fraction formed prior to log(t) = 9.55 from best fit SFH (2) 341-344 F4.2 --- Urf9.55 Random uncertainty 84th percentile in f9.55 346-349 F4.2 --- Utf9.55 Total uncertainty 84th percentile in f9.55 351-354 F4.2 --- Lrf9.55 Random uncertainty 16th percentile in f9.55 356-359 F4.2 --- Ltf9.55 Total uncertainty 16th percentile in f9.55 361-364 F4.2 --- f9.5 Mass fraction formed prior to log(t) = 9.5 from best fit SFH (2) 366-369 F4.2 --- Urf9.5 Random uncertainty 84th percentile in f9.5 371-374 F4.2 --- Utf9.5 Total uncertainty 84th percentile in f9.5 376-379 F4.2 --- Lrf9.5 Random uncertainty 16th percentile in f9.5 381-384 F4.2 --- Ltf9.5 Total uncertainty 16th percentile in f9.5 386-389 F4.2 --- f9.45 Mass fraction formed prior to log(t) = 9.45 from best fit SFH (2) 391-394 F4.2 --- Urf9.45 Random uncertainty 84th percentile in f9.45 396-399 F4.2 --- Utf9.45 Total uncertainty 84th percentile in f9.45 401-404 F4.2 --- Lrf9.45 Random uncertainty 16th percentile in f9.45 406-409 F4.2 --- Ltf9.45 Total uncertainty 16th percentile in f9.45 411-414 F4.2 --- f9.4 Mass fraction formed prior to log(t) = 9.4 from best fit SFH (2) 416-419 F4.2 --- Urf9.4 Random uncertainty 84th percentile in f9.4 421-424 F4.2 --- Utf9.4 Total uncertainty 84th percentile in f9.4 426-429 F4.2 --- Lrf9.4 Random uncertainty 16th percentile in f9.4 431-434 F4.2 --- Ltf9.4 Total uncertainty 16th percentile in f9.4 436-439 F4.2 --- f9.35 Mass fraction formed prior to log(t) = 9.35 from best fit SFH (2) 441-444 F4.2 --- Urf9.35 Random uncertainty 84th percentile in f9.35 446-449 F4.2 --- Utf9.35 Total uncertainty 84th percentile in f9.35 451-454 F4.2 --- Lrf9.35 Random uncertainty 16th percentile in f9.35 456-459 F4.2 --- Ltf9.35 Total uncertainty 16th percentile in f9.35 461-464 F4.2 --- f9.3 Mass fraction formed prior to log(t) = 9.3 from best fit SFH (2) 466-469 F4.2 --- Urf9.3 Random uncertainty 84th percentile in f9.3 471-474 F4.2 --- Utf9.3 Total uncertainty 84th percentile in f9.3 476-479 F4.2 --- Lrf9.3 Random uncertainty 16th percentile in f9.3 481-484 F4.2 --- Ltf9.3 Total uncertainty 16th percentile in f9.3 486-489 F4.2 --- f9.25 Mass fraction formed prior to log(t) = 9.25 from best fit SFH (2) 491-494 F4.2 --- Urf9.25 Random uncertainty 84th percentile in f9.25 496-499 F4.2 --- Utf9.25 Total uncertainty 84th percentile in f9.25 501-504 F4.2 --- Lrf9.25 Random uncertainty 16th percentile in f9.25 506-509 F4.2 --- Ltf9.25 Total uncertainty 16th percentile in f9.25 511-514 F4.2 --- f9.2 Mass fraction formed prior to log(t) = 9.2 from best fit SFH (2) 516-519 F4.2 --- Urf9.2 Random uncertainty 84th percentile in f9.2 521-524 F4.2 --- Utf9.2 Total uncertainty 84th percentile in f9.2 526-529 F4.2 --- Lrf9.2 Random uncertainty 16th percentile in f9.2 531-534 F4.2 --- Ltf9.2 Total uncertainty 16th percentile in f9.2 536-539 F4.2 --- f9.15 Mass fraction formed prior to log(t) = 9.15 from best fit SFH (2) 541-544 F4.2 --- Urf9.15 Random uncertainty 84th percentile in f9.15 546-549 F4.2 --- Utf9.15 Total uncertainty 84th percentile in f9.15 551-554 F4.2 --- Lrf9.15 Random uncertainty 16th percentile in f9.15 556-559 F4.2 --- Ltf9.15 Total uncertainty 16th percentile in f9.15 561-564 F4.2 --- f9.1 Mass fraction formed prior to log(t) = 9.1 from best fit SFH (2) 566-569 F4.2 --- Urf9.1 Random uncertainty 84th percentile in f9.1 571-574 F4.2 --- Utf9.1 Total uncertainty 84th percentile in f9.1 576-579 F4.2 --- Lrf9.1 Random uncertainty 16th percentile in f9.1 581-584 F4.2 --- Ltf9.1 Total uncertainty 16th percentile in f9.1 586-589 F4.2 --- f9.05 Mass fraction formed prior to log(t) = 9.05 from best fit SFH (2) 591-594 F4.2 --- Urf9.05 Random uncertainty 84th percentile in f9.05 596-599 F4.2 --- Utf9.05 Total uncertainty 84th percentile in f9.05 601-604 F4.2 --- Lrf9.05 Random uncertainty 16th percentile in f9.05 606-609 F4.2 --- Ltf9.05 Total uncertainty 16th percentile in f9.05 611-614 F4.2 --- f9.0 Mass fraction formed prior to log(t) = 9.0 from best fit SFH (2) 616-619 F4.2 --- Urf9.0 Random uncertainty 84th percentile in f9.0 621-624 F4.2 --- Utf9.0 Total uncertainty 84th percentile in f9.0 626-629 F4.2 --- Lrf9.0 Random uncertainty 16th percentile in f9.0 631-634 F4.2 --- Ltf9.0 Total uncertainty 16th percentile in f9.0 636-639 F4.2 --- f8.95 Mass fraction formed prior to log(t) = 8.95 from best fit SFH (2) 641-644 F4.2 --- Urf8.95 Random uncertainty 84th percentile in f8.95 646-649 F4.2 --- Utf8.95 Total uncertainty 84th percentile in f8.95 651-654 F4.2 --- Lrf8.95 Random uncertainty 16th percentile in f8.95 656-659 F4.2 --- Ltf8.95 Total uncertainty 16th percentile in f8.95 661-664 F4.2 --- f8.9 Mass fraction formed prior to log(t) = 8.9 from best fit SFH (2) 666-669 F4.2 --- Urf8.9 Random uncertainty 84th percentile in f8.9 671-674 F4.2 --- Utf8.9 Total uncertainty 84th percentile in f8.9 676-679 F4.2 --- Lrf8.9 Random uncertainty 16th percentile in f8.9 681-684 F4.2 --- Ltf8.9 Total uncertainty 16th percentile in f8.9 686-689 F4.2 --- f8.85 Mass fraction formed prior to log(t) = 8.85 from best fit SFH (2) 691-694 F4.2 --- Urf8.85 Random uncertainty 84th percentile in f8.85 696-699 F4.2 --- Utf8.85 Total uncertainty 84th percentile in f8.85 701-704 F4.2 --- Lrf8.85 Random uncertainty 16th percentile in f8.85 706-709 F4.2 --- Ltf8.85 Total uncertainty 16th percentile in f8.85 711-714 F4.2 --- f8.8 Mass fraction formed prior to log(t) = 8.8 from best fit SFH (2) 716-719 F4.2 --- Urf8.8 Random uncertainty 84th percentile in f8.8 721-724 F4.2 --- Utf8.8 Total uncertainty 84th percentile in f8.8 726-729 F4.2 --- Lrf8.8 Random uncertainty 16th percentile in f8.8 731-734 F4.2 --- Ltf8.8 Total uncertainty 16th percentile in f8.8 736-739 F4.2 --- f8.75 Mass fraction formed prior to log(t) = 8.75 from best fit SFH (2) 741-744 F4.2 --- Urf8.75 Random uncertainty 84th percentile in f8.75 746-749 F4.2 --- Utf8.75 Total uncertainty 84th percentile in f8.75 751-754 F4.2 --- Lrf8.75 Random uncertainty 16th percentile in f8.75 756-759 F4.2 --- Ltf8.75 Total uncertainty 16th percentile in f8.75 761-764 F4.2 --- f8.7 Mass fraction formed prior to log(t) = 8.7 from best fit SFH (2) 766-769 F4.2 --- Urf8.7 Random uncertainty 84th percentile in f8.7 771-774 F4.2 --- Utf8.7 Total uncertainty 84th percentile in f8.7 776-779 F4.2 --- Lrf8.7 Random uncertainty 16th percentile in f8.7 781-784 F4.2 --- Ltf8.7 Total uncertainty 16th percentile in f8.7 786-789 F4.2 --- f8.6 Mass fraction formed prior to log(t) = 8.6 from best fit SFH (2) 791-793 F3.1 --- Urf8.6 Random uncertainty 84th percentile in f8.6 795-798 F4.2 --- Utf8.6 Total uncertainty 84th percentile in f8.6 800-803 F4.2 --- Lrf8.6 Random uncertainty 16th percentile in f8.6 805-808 F4.2 --- Ltf8.6 Total uncertainty 16th percentile in f8.6 810-813 F4.2 --- f8.5 Mass fraction formed prior to log(t) = 8.5 from best fit SFH (2) 815-817 F3.1 --- Urf8.5 Random uncertainty 84th percentile in f8.5 819-822 F4.2 --- Utf8.5 Total uncertainty 84th percentile in f8.5 824-827 F4.2 --- Lrf8.5 Random uncertainty 16th percentile in f8.5 829-832 F4.2 --- Ltf8.5 Total uncertainty 16th percentile in f8.5 834-837 F4.2 --- f8.4 Mass fraction formed prior to log(t) = 8.4 from best fit SFH (2) 839-841 F3.1 --- Urf8.4 Random uncertainty 84th percentile in f8.4 843-846 F4.2 --- Utf8.4 Total uncertainty 84th percentile in f8.4 848-851 F4.2 --- Lrf8.4 Random uncertainty 16th percentile in f8.4 853-856 F4.2 --- Ltf8.4 Total uncertainty 16th percentile in f8.4 858-861 F4.2 --- f8.3 Mass fraction formed prior to log(t) = 8.3 from best fit SFH (2) 863-865 F3.1 --- Urf8.3 Random uncertainty 84th percentile in f8.3 867-870 F4.2 --- Utf8.3 Total uncertainty 84th percentile in f8.3 872-875 F4.2 --- Lrf8.3 Random uncertainty 16th percentile in f8.3 877-880 F4.2 --- Ltf8.3 Total uncertainty 16th percentile in f8.3 882-885 F4.2 --- f8.2 Mass fraction formed prior to log(t) = 8.2 from best fit SFH (2) 887-889 F3.1 --- Urf8.2 Random uncertainty 84th percentile in f8.2 891-894 F4.2 --- Utf8.2 Total uncertainty 84th percentile in f8.2 896-899 F4.2 --- Lrf8.2 Random uncertainty 16th percentile in f8.2 901-904 F4.2 --- Ltf8.2 Total uncertainty 16th percentile in f8.2 906-909 F4.2 --- f8.1 Mass fraction formed prior to log(t) = 8.1 from best fit SFH (2) 911-913 F3.1 --- Urf8.1 Random uncertainty 84th percentile in f8.1 915-918 F4.2 --- Utf8.1 Total uncertainty 84th percentile in f8.1 920-923 F4.2 --- Lrf8.1 Random uncertainty 16th percentile in f8.1 925-928 F4.2 --- Ltf8.1 Total uncertainty 16th percentile in f8.1 930-933 F4.2 --- f8.0 Mass fraction formed prior to log(t) = 8.0 from best fit SFH (2) 935-937 F3.1 --- Urf8.0 Random uncertainty 84th percentile in f8.0 939-942 F4.2 --- Utf8.0 Total uncertainty 84th percentile in f8.0 944-947 F4.2 --- Lrf8.0 Random uncertainty 16th percentile in f8.0 949-952 F4.2 --- Ltf8.0 Total uncertainty 16th percentile in f8.0 954-957 F4.2 --- f7.9 Mass fraction formed prior to log(t) = 7.9 from best fit SFH (2) 959-961 F3.1 --- Urf7.9 Random uncertainty 84th percentile in f7.9 963-966 F4.2 --- Utf7.9 Total uncertainty 84th percentile in f7.9 968-971 F4.2 --- Lrf7.9 Random uncertainty 16th percentile in f7.9 973-976 F4.2 --- Ltf7.9 Total uncertainty 16th percentile in f7.9 978-981 F4.2 --- f7.8 Mass fraction formed prior to log(t) = 7.8 from best fit SFH (2) 983-985 F3.1 --- Urf7.8 Random uncertainty 84th percentile in f7.8 987-990 F4.2 --- Utf7.8 Total uncertainty 84th percentile in f7.8 992-995 F4.2 --- Lrf7.8 Random uncertainty 16th percentile in f7.8 997-1000 F4.2 --- Ltf7.8 Total uncertainty 16th percentile in f7.8 1002-1005 F4.2 --- f7.7 Mass fraction formed prior to log(t) = 7.7 from best fit SFH (2) 1007-1009 F3.1 --- Urf7.7 Random uncertainty 84th percentile in f7.7 1011-1014 F4.2 --- Utf7.7 Total uncertainty 84th percentile in f7.7 1016-1019 F4.2 --- Lrf7.7 Random uncertainty 16th percentile in f7.7 1021-1024 F4.2 --- Ltf7.7 Total uncertainty 16th percentile in f7.7 1026-1029 F4.2 --- f7.6 Mass fraction formed prior to log(t) = 7.6 from best fit SFH (2) 1031-1034 F4.2 --- Urf7.6 Random uncertainty 84th percentile in f7.6 1036-1039 F4.2 --- Utf7.6 Total uncertainty 84th percentile in f7.6 1041-1044 F4.2 --- Lrf7.6 Random uncertainty 16th percentile in f7.6 1046-1049 F4.2 --- Ltf7.6 Total uncertainty 16th percentile in f7.6 1051-1054 F4.2 --- f7.5 Mass fraction formed prior to log(t) = 7.5 from best fit SFH (2) 1056-1058 F3.1 --- Urf7.5 Random uncertainty 84th percentile in f7.5 1060-1063 F4.2 --- Utf7.5 Total uncertainty 84th percentile in f7.5 1065-1068 F4.2 --- Lrf7.5 Random uncertainty 16th percentile in f7.5 1070-1073 F4.2 --- Ltf7.5 Total uncertainty 16th percentile in f7.5 1075-1078 F4.2 --- f7.4 Mass fraction formed prior to log(t) = 7.4 from best fit SFH (2) 1080-1082 F3.1 --- Urf7.4 Random uncertainty 84th percentile in f7.4 1084-1087 F4.2 --- Utf7.4 Total uncertainty 84th percentile in f7.4 1089-1092 F4.2 --- Lrf7.4 Random uncertainty 16th percentile in f7.4 1094-1097 F4.2 --- Ltf7.4 Total uncertainty 16th percentile in f7.4 1099-1102 F4.2 --- f7.3 Mass fraction formed prior to log(t) = 7.3 from best fit SFH (2) 1104-1106 F3.1 --- Urf7.3 Random uncertainty 16th percentile in f7.3 1108-1111 F4.2 --- Utf7.3 Total uncertainty 84th percentile in f7.3 1113-1116 F4.2 --- Lrf7.3 Random uncertainty 16th percentile in f7.3 1118-1121 F4.2 --- Ltf7.3 Total uncertainty 16th percentile in f7.3 1123-1126 F4.2 --- f7.2 Mass fraction formed prior to log(t) = 7.2 from best fit SFH (2) 1128-1130 F3.1 --- Urf7.2 Random uncertainty 84th percentile in f7.2 1132-1135 F4.2 --- Utf7.2 Total uncertainty 84th percentile in f7.2 1137-1140 F4.2 --- Lrf7.2 Random uncertainty 16th percentile in f7.2 1142-1145 F4.2 --- Ltf7.2 Total uncertainty 16th percentile in f7.2 1147-1150 F4.2 --- f7.1 Mass fraction formed prior to log(t) = 7.1 from best fit SFH (2) 1152-1154 F3.1 --- Urf7.1 Random uncertainty 84th percentile in f7.1 1156-1159 F4.2 --- Utf7.1 Total uncertainty 84th percentile in f7.1 1161-1164 F4.2 --- Lrf7.1 Random uncertainty 16th percentile in f7.1 1166-1169 F4.2 --- Ltf7.1 Total uncertainty 16th percentile in f7.1 1171-1174 F4.2 --- f7.0 Mass fraction formed prior to log(t) = 7.0 from best fit SFH (2) 1176-1178 F3.1 --- Urf7.0 Random uncertainty 84th percentile in f7.0 1180-1183 F4.2 --- Utf7.0 Total uncertainty 84th percentile in f7.0 1185-1188 F4.2 --- Lrf7.0 Random uncertainty 16th percentile in f7.0 1190-1193 F4.2 --- Ltf7.0 Total uncertainty 16th percentile in f7.0 1195-1198 F4.2 --- f6.9 Mass fraction formed prior to log(t) = 6.9 from best fit SFH (2) 1200-1202 F3.1 --- Urf6.9 Random uncertainty 84th percentile in f6.9 1204-1207 F4.2 --- Utf6.9 Total uncertainty 84th percentile in f6.9 1209-1212 F4.2 --- Lrf6.9 Random uncertainty 16th percentile in f6.9 1214-1217 F4.2 --- Ltf6.9 Total uncertainty 16th percentile in f6.9 1219-1222 F4.2 --- f6.8 Mass fraction formed prior to log(t) = 6.8 from best fit SFH (2) 1224-1226 F3.1 --- Urf6.8 Random uncertainty 84th percentile in f6.8 1228-1231 F4.2 --- Utf6.8 Total uncertainty 84th percentile in f6.8 1233-1236 F4.2 --- Lrf6.8 Random uncertainty 16th percentile in f6.8 1238-1241 F4.2 --- Ltf6.8 Total uncertainty 16th percentile in f6.8 1243-1246 F4.2 --- f6.7 Mass fraction formed prior to log(t) = 6.7 from best fit SFH (2) 1248-1251 F4.2 --- Urf6.7 Random uncertainty 84th percentile in f6.7 1253-1256 F4.2 --- Utf6.7 Total uncertainty 84th percentile in f6.7 1258-1260 F3.1 --- Lrf6.7 Random uncertainty 16th percentile in f6.7 1262-1264 F3.1 --- Ltf6.7 Total uncertainty 16th percentile in f6.7 1266-1268 F3.1 --- f6.6 Mass fraction formed prior to log(t) = 6.6 from best fit SFH (2) 1270-1272 F3.1 --- Urf6.6 Random uncertainty 84th percentile in f6.6 1274-1276 F3.1 --- Utf6.6 Total uncertainty 84th percentile in f6.6 1278-1280 F3.1 --- Lrf6.6 Random uncertainty 16th percentile in f6.6 1282-1284 F3.1 --- Ltf6.6 Total uncertainty 16th percentile in f6.6

Note (1): Per field computed by integrating the SFH. Note that this quantity is not the present day stellar mass, as it does not account for stellar evolutions effects (e.g., mass loss, stellar death, etc).Note (2): By construction, the cumulative SFHs are 0 at log(t) = 10.15 and 1 at log(t) = 6.6.

History: From electronic version of the journalReferences: Weisz et al., Paper II, 2014ApJ...789..148W Weisz et al., Paper III, 2015ApJ...804..136W(End)Prepared by [AAS], Tiphaine Pouvreau [CDS] 13-Mar-2017

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