Galaxy And Mass Assembly (GAMA): the bright void galaxy population in the optical and mid-IR

被引：20

作者：

Penny, S. J. ^{[1
,2
,3
]}

Brown, M. J. I. ^{[1
,2
]}

Pimbblet, K. A. ^{[1
,2
,4
]}

Cluver, M. E. ^{[5
]}

Croton, D. J. ^{[6
]}

Owers, M. S. ^{[7
,8
]}

Lange, R. ^{[9
]}

Alpaslan, M. ^{[10
]}

Baldry, I. ^{[11
]}

Bland-Hawthorn, J. ^{[12
]}

Brough, S.

Driver, S. P. ^{[9
,13
]}

Holwerda, B. W. ^{[14
]}

Hopkins, A. M. ^{[7
]}

Jarrett, T. H. ^{[15
]}

Jones, D. Heath ^{[8
]}

Kelvin, L. S. ^{[16
]}

Lara-Lopez, M. A. ^{[17
]}

Liske, J. ^{[18
]}

Lopez-Sanchez, A. R. ^{[7
,8
]}

Loveday, J. ^{[19
]}

Meyer, M. ^{[9
]}

Norberg, P. ^{[20
,21
]}

Robotham, A. S. G. ^{[9
]}

Rodrigues, M. ^{[22
]}

机构：

[1] Monash Univ, Sch Phys, Clayton, Vic 3800, Australia

[2] Monash Univ, Monash Ctr Astrophys, Clayton, Vic 3800, Australia

[3] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England

[4] Univ Hull, Dept Math & Phys, Kingston Upon Hull HU6 7RX, Yorks, England

[5] Univ Western Cape, ZA-7535 Bellville, South Africa

[6] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[7] Australian Astron Observ, N Ryde, NSW 1670, Australia

[8] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia

[9] Univ Western Australia, ICRAR, Crawley, WA 6009, Australia

[10] NASA, Ames Res Ctr, Mountain View, CA 94035 USA

[11] Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 5RF, Merseyside, England

[12] Univ Sydney, Sch Phys A28, Sydney Inst Astron, Sydney, NSW 2088, Australia

[13] Univ St Andrews, Sch Phys & Astron, Scottish Univ Phys Alliance, St Andrews KY16 9SS, Fife, Scotland

[14] Leiden Univ, Sterrenwacht Leiden, NL-2333 CA Leiden, Netherlands

[15] Univ Cape Town, Dept Astron, ZA-7701 Rondebosch, South Africa

[16] Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria

[17] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico

[18] Univ Hamburg, Hamburger Sternwarte, D-21029 Hamburg, Germany

[19] Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England

[20] Univ Durham, ICC, Durham DH1 3LE, England

[21] Univ Durham, CEA, Dept Phys, Durham DH1 3LE, England

[22] Univ Paris Diderot, CNRS, Observ Paris, GEPI, F-92195 Meudon, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2015年 / 453卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

galaxies: evolution; galaxies: general; infrared: galaxies; DIGITAL SKY SURVEY; STAR-FORMATION HISTORIES; COLOR-MAGNITUDE RELATION; ACTIVE GALACTIC NUCLEI; REDSHIFT SURVEY; STELLAR MASS; DATA RELEASE; FORMATION RATES; ENVIRONMENTAL DEPENDENCE; PHOTOMETRIC PROPERTIES;

D O I：

10.1093/mnras/stv1926

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We examine the properties of galaxies in the Galaxies and Mass Assembly (GAMA) survey located in voids with radii > 10 h(-1) Mpc. Utilizing the GAMA equatorial survey, 592 void galaxies are identified out to z approximate to 0.1 brighter than M-r = -18.4, our magnitude completeness limit. Using the W-H alpha versus [N II]/H alpha (WHAN) line strength diagnostic diagram, we classify their spectra as star forming, AGN, or dominated by old stellar populations. For objects more massive than 5 x 10(9) M-circle dot, we identify a sample of 26 void galaxies with old stellar populations classed as passive and retired galaxies in the WHAN diagnostic diagram, else they lack any emission lines in their spectra. When matched to Wide-field Infrared Survey Explorer mid-IR photometry, these passive and retired galaxies exhibit a range of mid-IR colour, with a number of void galaxies exhibiting [4.6] - [12] colours inconsistent with completely quenched stellar populations, with a similar spread in colour seen for a randomly drawn non-void comparison sample. We hypothesize that a number of these galaxies host obscured star formation, else they are star forming outside of their central regions targeted for single-fibre spectroscopy. When matched to a randomly drawn sample of non-void galaxies, the void and non-void galaxies exhibit similar properties in terms of optical and mid-IR colour, morphology, and star formation activity, suggesting comparable mass assembly and quenching histories. A trend in mid-IR [4.6] - [12] colour is seen, such that both void and non-void galaxies with quenched/passive colours < 1.5 typically have masses higher than 10(10) M-circle dot, where internally driven processes play an increasingly important role in galaxy evolution.

引用

页码：3519 / 3539

页数：21

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