The star formation history of galaxies: the role of galaxy mass, morphology and environment

被引：61

作者：

Guglielmo, Valentina ^{[1
,2
]}

Poggianti, Bianca M. ^{[1
]}

Moretti, Alessia ^{[1
,2
]}

Fritz, Jacopo ^{[3
,4
]}

Calvi, Rosa ^{[5
]}

Vulcani, Benedetta ^{[6
]}

Fasano, Giovanni ^{[1
]}

Paccagnella, Angela ^{[2
]}

机构：

[1] Astron Observ Padova, INAF, I-35122 Padua, Italy

[2] Univ Padua, Dept Phys & Astron, I-35122 Padua, Italy

[3] Univ Ghent, Sterrenkundig Observat Vakgroep Fys Sterrenkunde, B-S99000 Ghent, Belgium

[4] UNAM, CRyA, Ctr Radioastron & Astrofis, Michoacan 58089, Mexico

[5] Univ La Laguna, Dept Astrofis, Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain

[6] Univ Tokyo, UTIAS, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778582, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 450卷 / 03期

基金：

日本学术振兴会;

关键词：

galaxies: clusters: general; galaxies: evolution; galaxies: formation; galaxies: star formation; DIGITAL SKY SURVEY; SIMILAR-TO; RESOLUTION GALACTIC SPECTRA; BRIGHTEST CLUSTER SAMPLE; COLOR-DENSITY RELATION; MAXIMUM A-POSTERIORI; STELLAR MASS; FORMING GALAXIES; LUMINOSITY FUNCTION; REDSHIFT SURVEY;

D O I：

10.1093/mnras/stv757

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyse the star formation history (SFH) of galaxies as a function of present-day environment, galaxy stellar mass and morphology. The SFH is derived by means of a non-parametric spectrophotometric model applied to individual galaxies at z similar to 0.04-0.1 in the WIde-field Nearby Galaxy-cluster Survey (WINGS) clusters and the Padova Millennium Galaxy and Group Catalogue (PM2GC) field. The field reconstructed evolution of the star formation rate density (SFRD) follows the values observed at each redshift, except at z > 2, where our estimate is similar to 1.7 x higher than the high-z observed value. The slope of the SFRD decline with time gets progressively steeper going from low-mass to high-mass haloes. The decrease of the SFRD since z = 2 is due to (1) quenching - 50 per cent of the SFRD in the field and 75 per cent in clusters at z > 2 originated in galaxies that are passive today - and (2) the fact that the average SFR of today's star-forming galaxies has decreased with time. We quantify the contribution to the SFRD(z) of galaxies of today's different masses and morphologies. The current morphology correlates with the current star formation activity but is irrelevant for the past stellar history. The average SFH depends on galaxy mass, but galaxies of a given mass have different histories depending on their environment. We conclude that the variation of the SFRD(z) with environment is not driven by different distributions of galaxy masses and morphologies in clusters and field, and must be due to an accelerated formation in high-mass haloes compared to low-mass ones even for galaxies that will end up having the same galaxy mass today.

引用

页码：2749 / 2763

页数：15

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