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Deconstructing the galaxy stellar mass function with UKIDSS and CANDELS : the impact of colour, structure and environment

Alice Mortlock, Christopher. J Conselice, William G Hartley, Ken Duncan, Caterina Lani, Jamie R Ownsworth, Omar Almaini, Arjen van der Wel (UGent) , Kuang-Han Huang, Matthew LN Ashby, et al.
(2015) MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 447(1). p.2-24
Author
Organization
Abstract
We combine photometry from the Ultra Deep Survey (UDS), Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) UDS and CANDELS the Great Observatories Origins Deep Survey-South (GOODS-S) surveys to construct the galaxy stellar mass function probing both the low-and high-mass end accurately in the redshift range 0.3 < z < 3. The advantages of using a homogeneous concatenation of these data sets include meaningful measures of environment in the UDS, due to its large area (0.88 deg(2)), and the high-resolution deep imaging in CANDELS (H-160 > 26.0), affording us robust measures of structural parameters. We construct stellar mass functions for the entire sample as parametrized by the Schechter function, and find that there is a decline in the values of phi and of alpha with higher redshifts, and a nearly constant M* up to z similar to 3. We divide the galaxy stellar mass function by colour, structure, and environment and explore the links between environmental overdensity, morphology, and the quenching of star formation. We find that a double Schechter function describes galaxies with high Sersic index (n > 2.5), similar to galaxies which are red or passive. The low-mass end of the n > 2.5 stellar mass function is dominated by blue galaxies, whereas the high-mass end is dominated by red galaxies. This shows that there is a possible link between morphological evolution and star formation quenching in high mass galaxies, which is not seen in lower mass systems. This in turn suggests that there are strong mass-dependent quenching mechanisms. In addition, we find that the number density of high-mass systems is elevated in dense environments, suggesting that an environmental process is building up massive galaxies quicker in over densities than in lower densities.
Keywords
galaxies: evolution, galaxies: formation, galaxies: luminosity function, mass function, galaxies: structure, SIMILAR-TO 2, MORPHOLOGY-DENSITY RELATION, STAR-FORMATION RATES, EXTRAGALACTIC LEGACY SURVEY, GOODS NICMOS SURVEY, ULTRA-DEEP SURVEY, COSMIC EVOLUTION SURVEY, HUBBLE-SPACE-TELESCOPE, HIGH-REDSHIFT GALAXIES, LY-ALPHA EMITTERS

Citation

Please use this url to cite or link to this publication:

MLA
Mortlock, Alice, et al. “Deconstructing the Galaxy Stellar Mass Function with UKIDSS and CANDELS : The Impact of Colour, Structure and Environment.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 447, no. 1, 2015, pp. 2–24, doi:10.1093/mnras/stu2403.
APA
Mortlock, A., Conselice, Christopher. J., Hartley, W. G., Duncan, K., Lani, C., Ownsworth, J. R., … Kocevski, D. D. (2015). Deconstructing the galaxy stellar mass function with UKIDSS and CANDELS : the impact of colour, structure and environment. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 447(1), 2–24. https://doi.org/10.1093/mnras/stu2403
Chicago author-date
Mortlock, Alice, Christopher. J Conselice, William G Hartley, Ken Duncan, Caterina Lani, Jamie R Ownsworth, Omar Almaini, et al. 2015. “Deconstructing the Galaxy Stellar Mass Function with UKIDSS and CANDELS : The Impact of Colour, Structure and Environment.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447 (1): 2–24. https://doi.org/10.1093/mnras/stu2403.
Chicago author-date (all authors)
Mortlock, Alice, Christopher. J Conselice, William G Hartley, Ken Duncan, Caterina Lani, Jamie R Ownsworth, Omar Almaini, Arjen van der Wel, Kuang-Han Huang, Matthew LN Ashby, SP Willner, Adriano Fontana, Avishai Dekel, Anton M Koekemoer, Harry C Ferguson, Sandra M Faber, Norman A Grogin, and Dale D Kocevski. 2015. “Deconstructing the Galaxy Stellar Mass Function with UKIDSS and CANDELS : The Impact of Colour, Structure and Environment.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447 (1): 2–24. doi:10.1093/mnras/stu2403.
Vancouver
1.
Mortlock A, Conselice ChristopherJ, Hartley WG, Duncan K, Lani C, Ownsworth JR, et al. Deconstructing the galaxy stellar mass function with UKIDSS and CANDELS : the impact of colour, structure and environment. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2015;447(1):2–24.
IEEE
[1]
A. Mortlock et al., “Deconstructing the galaxy stellar mass function with UKIDSS and CANDELS : the impact of colour, structure and environment,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 447, no. 1, pp. 2–24, 2015.
@article{8567791,
  abstract     = {{We combine photometry from the Ultra Deep Survey (UDS), Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) UDS and CANDELS the Great Observatories Origins Deep Survey-South (GOODS-S) surveys to construct the galaxy stellar mass function probing both the low-and high-mass end accurately in the redshift range 0.3 < z < 3. The advantages of using a homogeneous concatenation of these data sets include meaningful measures of environment in the UDS, due to its large area (0.88 deg(2)), and the high-resolution deep imaging in CANDELS (H-160 > 26.0), affording us robust measures of structural parameters. We construct stellar mass functions for the entire sample as parametrized by the Schechter function, and find that there is a decline in the values of phi and of alpha with higher redshifts, and a nearly constant M* up to z similar to 3. We divide the galaxy stellar mass function by colour, structure, and environment and explore the links between environmental overdensity, morphology, and the quenching of star formation. We find that a double Schechter function describes galaxies with high Sersic index (n > 2.5), similar to galaxies which are red or passive. The low-mass end of the n > 2.5 stellar mass function is dominated by blue galaxies, whereas the high-mass end is dominated by red galaxies. This shows that there is a possible link between morphological evolution and star formation quenching in high mass galaxies, which is not seen in lower mass systems. This in turn suggests that there are strong mass-dependent quenching mechanisms. In addition, we find that the number density of high-mass systems is elevated in dense environments, suggesting that an environmental process is building up massive galaxies quicker in over densities than in lower densities.}},
  author       = {{Mortlock, Alice and Conselice, Christopher. J and Hartley, William G and Duncan, Ken and Lani, Caterina and Ownsworth, Jamie R and Almaini, Omar and van der Wel, Arjen and Huang, Kuang-Han and Ashby, Matthew LN and Willner, SP and Fontana, Adriano and Dekel, Avishai and Koekemoer, Anton M and Ferguson, Harry C and Faber, Sandra M and Grogin, Norman A and Kocevski, Dale D}},
  issn         = {{0035-8711}},
  journal      = {{MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}},
  keywords     = {{galaxies: evolution,galaxies: formation,galaxies: luminosity function,mass function,galaxies: structure,SIMILAR-TO 2,MORPHOLOGY-DENSITY RELATION,STAR-FORMATION RATES,EXTRAGALACTIC LEGACY SURVEY,GOODS NICMOS SURVEY,ULTRA-DEEP SURVEY,COSMIC EVOLUTION SURVEY,HUBBLE-SPACE-TELESCOPE,HIGH-REDSHIFT GALAXIES,LY-ALPHA EMITTERS}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{2--24}},
  title        = {{Deconstructing the galaxy stellar mass function with UKIDSS and CANDELS : the impact of colour, structure and environment}},
  url          = {{http://doi.org/10.1093/mnras/stu2403}},
  volume       = {{447}},
  year         = {{2015}},
}
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