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J/MNRAS/448/1430  A framework for empirical galaxy phenomenology  (Munoz+, 2015)

A framework for empirical galaxy phenomenology: the scatter in galaxy ages and stellar metallicities. Munoz J.A., Peeples M.S. <Mon. Not. R. Astron. Soc., 448, 1430-1445 (2015)> =2015MNRAS.448.1430M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Models, evolutionary ; Redshifts Keywords: galaxies: abundances - galaxies: dwarf - galaxies: evolution - galaxies: formation Abstract: We develop a theoretical framework that extracts a deeper understanding of galaxy formation from empirically derived relations among galaxy properties by extending the main-sequence integration method for computing galaxy star formation histories. We properly account for scatter in the stellar mass-star formation rate relation and the evolving fraction of passive systems and find that the latter effect is almost solely responsible for the age distributions among z∼0 galaxies with stellar masses above ∼1010 M. However, while we qualitatively agree with the observed median stellar metallicity as a function of stellar mass, we attribute our inability to reproduce the distribution in detail largely to a combination of imperfect gas-phase metallicity and α/Fe ratio calibrations. Our formalism will benefit from new observational constraints and, in turn, improve interpretations of future data by providing self-consistent star formation histories for population synthesis modelling. Description: In this study, we develop a cohesive theoretical formalism for translating empirical relations into an understanding of the variations in galactic star formation histories. We achieve this goal by incorporating into the Main Sequence Integration (MSI) method the scatter suggested by the evolving fraction of quiescent galaxies and the spread in the observed stellar mass-star formation rate relation. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file models.dat 49 30 List of models tablesd1/* 228 36 Galaxy properties
See also: J/A+A/288/713 : Star formation in galaxies (Firmani+ 1994) Byte-by-byte Description of file: models.dat
Bytes Format Units Label Explanations
1- 4 F4.2 --- zf [0/2.0] Redshift of formation zf 6- 9 A4 --- Calib Fundamental metallicity relation (FMR) calibration (1) 11- 13 A3 --- Type Galaxy type in the file (2) 15- 49 A35 --- FileName File name in subdirectory tablesd1
Note (1): FMR calibration as follows: KD02 = Kewley & Dopita (2002ApJS..142...35K); M10 = Mannucci et al. (2010MNRAS.408.2115M); PP04 = Pettini & Pagel (2004MNRAS.348L..59P); Z94 = Zaritsky et al. (1994ApJ...420...87Z). Note (2): Type as follows: SF = Star-forming galaxies; P = Passive galaxies; All = All galaxies.
Byte-by-byte Description of file: tablesd1/*
Bytes Format Units Label Explanations
1- 4 F4.1 [Msun] logM* [8.5/12] Log of stellar mass at redshift zf 6- 12 F7.5 [yr] logLA16 16th percentile of log luminosity-weighted age 14- 20 F7.5 [yr] logLA50 50th percentile of log luminosity-weighted age 22- 29 F8.5 [yr] logLA84 84th percentile of log luminosity-weighted age 31- 41 F11.8 [Sun] logLZ16 16th percentile of log luminosity-weighted stellar metallicity 43- 54 F12.9 [Sun] logLZ50 50th percentile of log luminosity-weighted stellar metallicity 56- 66 F11.8 [Sun] logLZ84 84th percentile of log luminosity-weighted stellar metallicity 68- 74 F7.5 [yr] logMA16 16th percentile of log mass-weighted age 76- 82 F7.5 [yr] logMA50 50th percentile of log mass-weighted age 84- 91 F8.5 [yr] logMA84 84th percentile of log mass-weighted age 93-102 F10.7 [Sun] logMZ16 16th percentile of log mass-weighted stellar metallicity 104-114 F11.8 [Sun] logMZ50 50th percentile of log mass-weighted stellar metallicity 116-128 F13.8 [Sun] logMZ84 84th percentile of log mass-weighted stellar metallicity 130-139 F10.7 --- z90-16 16th percentile of the redshift at which 90 per cent of the final stellar mass is reached 141-149 F9.7 --- z90-50 50th percentile of the redshift at which 90 per cent of the final stellar mass is reached 151-158 F8.6 --- z90-84 84th percentile of the redshift at which 90 per cent of the final stellar mass is reached 160-167 F8.6 --- z50-16 16th percentile of the redshift at which 50 per cent of the final stellar mass is reached 169-176 F8.6 --- z50-50 50th percentile of the redshift at which 50 per cent of the final stellar mass is reached 178-185 F8.6 --- z50-84 84th percentile of the redshift at which 50 per cent of the final stellar mass is reached 187-199 F13.7 --- zq16 ?=-999. 16th percentile of the quenching redshift (1) 201-214 F14.8 --- zq50 ?=-999. 50th percentile of the quenching redshift (1) 216-228 F13.7 --- zq84 ?=-999. 84th percentile of the quenching redshift (1)
Note (1): Values of "-999" for the quenching redshift indicate that a value could not be determined because not enough realizations resulted in a passive system at the final redshift.
History: From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 21-Nov-2017
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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