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J/MNRAS/457/3743  104 massive quiescent galaxies SFHs (Dominguez Sanchez+, 2016)

Pathways to quiescence: SHARDS view on the star formation histories of massive quiescent galaxies at 1.0 < z < 1.5. Dominguez Sanchez H., Perez-Gonzalez P.G., Esquej P., Eliche-Moral M.C., Barro G., Cava A., Koekemoer A.M., Alcalde Pampliega B., Alonso Herrero A., Bruzual G., Cardiel N., Cenarro J., Ceverino D., Charlot S., Hernan Caballero A. <Mon. Not. R. Astron. Soc., 457, 3743-3768 (2016)> =2016MNRAS.457.3743D (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; Photometry ; Stars, ages Keywords: galaxies: evolution - galaxies: formation - galaxies: high-redshift - galaxies: stellar content Abstract: We present star formation histories (SFHs) for a sample of 104 massive (stellar mass M>1010M) quiescent galaxies (MQGs) at z=1.0-1.5 from the analysis of spectrophotometric data from the Survey for High-z Absorption Red and Dead Sources (SHARDS) and HST/WFC3 G102 and G141 surveys of the GOODS-North field, jointly with broad-band observations from ultraviolet (UV) to far-infrared (far-IR). The sample is constructed on the basis of rest-frame UVJ colours and specific star formation rates (sSFRs=SFR/Mass). The spectral energy distributions (SEDs) of each galaxy are compared to models assuming a delayed exponentially declining SFH. A Monte Carlo algorithm characterizes the degeneracies, which we are able to break taking advantage of the SHARDS data resolution, by measuring indices such as MgUV and D4000. The population of MQGs shows a duality in their properties. The sample is dominated (85 per cent) by galaxies with young mass-weighted ages, <tM><2Gyr, short star formation time-scales, <τ≳60-200MYr, and masses log(M/M)∼10.5. There is an older population (15 per cent) with <tM≥2-4Gyr, longer star formation time-scales, <τ≳400Myr, and larger masses, log(M/M)∼10.7. The SFHs of our MQGs are consistent with the slope and the location of the main sequence of star-forming galaxies at z>1.0, when our galaxies were 0.5-1.0Gyr old. According to these SFHs, all the MQGs experienced a luminous infrared galaxy phase that lasts for ∼500Myr, and half of them an ultraluminous infrared galaxy phase for ∼100Myr. We find that the MQG population is almost assembled at z∼1, and continues evolving passively with few additions to the population. Description: Our sample was selected in the 130 arcmin2 covered by SHARDS (Perez-Gonzalez et al., 2013, Cat. J/ApJ/762/46) in the GOODS-N region. We analyse the sample of MQGs (M>1010M) at 1.0<z<1.5 selected with two different criteria: their rest-frame UVJ colours and their specific star formation rate (sSFR). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 156 104 Galaxy properties for the sample of 104 galaxies
See also: J/ApJ/762/46 : SHARDS: GOODS-N spectrophotometry survey (Perez-Gonzalez+, 2013) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 A5 --- --- [SHARD] 6- 28 A23 --- SHARD SHARD name ( 30- 35 F6.4 --- z Redshift 37- 38 A2 --- n_z [zs zp] Redshift type 40- 43 F4.2 mag V-J V-J colour index 45- 48 F4.2 mag e_V-J rms uncertainty on V-J 50- 53 F4.2 mag U-V U-V colour index 55- 58 F4.2 mag e_U-V rms uncertainty on U-V 60- 64 F5.3 1/Gyr sSFR(IR+UV) Specific SFR used in the sample selection (see Section 2.2) 66- 70 F5.3 1/Gyr e_sSFR(IR+UV) rms uncertainty on sSFR(IR+UV) 72- 76 F5.2 [Msun] logM Mass 78- 81 F4.2 [Msun] e_logM rms uncertainty on logM 83- 86 F4.2 Gyr t0 Best-fitting age 88- 91 F4.2 Gyr E_t0 Error on t0 (upper value) 93- 96 F4.2 Gyr e_t0 Error on t0 (lower value) 98-101 F4.2 Gyr tM Mass-weighted age 103-106 F4.2 Gyr E_tM Error on tM (upper value) 108-111 F4.2 Gyr e_tM Error on tM (lower value) 113-115 I3 Myr tau Star formation time-scale 117-119 I3 Myr E_tau Error on tau (upper value) 121-123 I3 Myr e_tau Error on tau (lower value) 125-128 F4.2 mag Av Dust attenuation 130-133 F4.2 mag e_Av rms uncertainty on Av 135-137 F3.1 [Sun] Z Metallicity 139-141 F3.1 [Sun] E_Z Error on Z (upper value) 143-145 F3.1 [Sun] e_Z Error on Z (lower value) 147-152 F6.3 Msun/yr SFR(SED) SFR from SED fitting 154-156 I3 % Signi Significance of the primary solution
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Nov-2016
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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