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The VANDELS survey: the star-formation histories of massive quiescent galaxies at 1.0 < z < 1.3
被引：117
|作者：
Carnall, A. C.
[1
]
McLure, R. J.
[1
]
Dunlop, J. S.
[1
]
Cullen, F.
[1
]
McLeod, D. J.
[1
]
Wild, V
[2
]
Johnson, B. D.
[3
]
Appleby, S.
[1
]
Dave, R.
[1
,4
,5
]
Amorin, R.
[6
,7
]
Bolzonella, M.
[8
]
Castellano, M.
[9
]
Cimatti, A.
[10
,11
]
Cucciati, O.
[8
]
GargiuloI, A.
[12
]
Garilli, B.
[12
]
Marchi, F.
[9
]
Pentericci, L.
[9
]
Pozzetti, L.
[8
]
Schreiber, C.
[13
]
Talia, M.
[8
,10
]
Zamorani, G.
[8
]
机构：
[1] Univ Edinburgh, Inst Astron, Royal Observ, SUPA, Edinburgh EH9 3HJ, Midlothian, Scotland
[2] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland
[3] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
[4] Univ Western Cape, Dept Phys & Astron, ZA-7535 Cape Town, South Africa
[5] South African Astron Observ, ZA-7925 Cape Town, South Africa
[6] Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, La Serena 1305, Chile
[7] Univ La Serena, Dept Fis & Astron, La Serena 1200, Chile
[8] INAF OAS Bologna, Via P Gobetti 93-3, I-40129 Bologna, Italy
[9] INAF Osservatorio Astron Roma, Via Frascati 33, I-00078 Monte Porzio Catone, Italy
[10] Univ Bologna, Dept Phys & Astron DIFA, I-40129 Bologna, Italy
[11] INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy
[12] INAF IASF Milano, Via A Corti 12, I-20133 Milan, Italy
[13] Univ Oxford, Dept Phys, Keble Rd, Oxford OX1 3RH, England
基金：
英国科学技术设施理事会;
关键词：
methods: statistical;
galaxies: evolution;
galaxies: star formation;
POST-STARBURST GALAXIES;
ACTIVE GALACTIC NUCLEI;
SPECTRAL ENERGY-DISTRIBUTIONS;
OLD STELLAR POPULATIONS;
DIGITAL SKY SURVEY;
FORMING GALAXIES;
ATLAS(3D) PROJECT;
RED-SEQUENCE;
AGN FEEDBACK;
BLACK-HOLES;
D O I：
10.1093/mnras/stz2544
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a Bayesian full-spectral-fitting analysis of 75 massive (M-* > 10(10.3) M-circle dot) UVJ-selected galaxies at redshifts of 1.0 < z < 1.3, combining extremely deep rest-frame ultraviolet spectroscopy from VANDELS with multiwavelength photometry. By the use of a sophisticated physical plus systematic uncertainties model, constructed within the BAGPIPES code, we place strong constraints on the star-formation histories (SFHs) of individual objects. We first constrain the stellar mass versus stellar age relationship, finding a steep trend towards earlier average formation time with increasing stellar mass (downsizing) of 1.48(-0.39)(+0.34) Gyr per decade in mass, although this shows signs of flattening at M-* > 10(11) M-circle dot. We show that this is consistent with other spectroscopic studies from 0 < z < 2. This relationship places strong constraints on the AGN-feedback models used in cosmological simulations. We demonstrate that, although the relationships predicted by SIMBA and ILLUSTRISTNG agree well with observations at z = 0.1, they are too shallow at z = 1, predicting an evolution of less than or similar to 0.5 Gyr per decade in mass. Secondly, we consider the connections between green-valley, post-starburst, and quiescent galaxies, using our inferred SFH shapes and the distributions of galaxy physical properties on the UVJ diagram. The majority of our lowest-mass galaxies (M-* similar to 10(10.5) M-circle dot) are consistent with formation in recent (z < 2), intense starburst events, with time-scales of less than or similar to 500 Myr. A second class of objects experience extended star-formation epochs before rapidly quenching, passing through both green-valley and post-starburst phases. The most massive galaxies in our sample are extreme systems: already old by z = 1, they formed at z similar to 5 and quenched by z = 3. However, we find evidence for their continued evolution through both AGN and rejuvenated star-formation activity.
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页码：417 / 439
页数：23
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