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Eales, S, Fullard, A, Allen, M, Smith, MWL, Baldry, IK, Bourne, N, Clark, CJR, Driver, S, Dunne, L, Dye, S, Graham, AW, Ibar, E, Hopkins, A, Ivison, R, Kelvin, LS, Maddox, S, Maraston, C, Robotham, ASG, Smith, D, Taylor, EN , Valiante, E, Werf, PVD, Baes, M, Brough, S, Clements, D, Cooray, A, Gomez, H, Loveday, J, Phillipps, S, Scott, D and Serjeant, S (2015) H-ATLAS/GAMA: Quantifying the Morphological Evolution of the Galaxy Population Using Cosmic Calorimetry. Monthly Notices of the Royal Astronomical Society, 452 (4). pp. 3489-3507. ISSN 0035-8711
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Abstract
Using results from the Herschel Astrophysical Terrahertz Large-Area Survey and the Galaxy and Mass Assembly project, we show that, for galaxy masses above approximately 1.0e8 solar masses, 51% of the stellar mass-density in the local Universe is in early-type galaxies (ETGs: Sersic n > 2.5) while 89% of the rate of production of stellar mass-density is occurring in late-type galaxies (LTGs: Sersic n < 2.5). From this zero-redshift benchmark, we have used a calorimetric technique to quantify the importance of the morphological transformation of galaxies over the history of the Universe. The extragalactic background radiation contains all the energy generated by nuclear fusion in stars since the Big Bang. By resolving this background radiation into individual galaxies using the deepest far-infrared survey with the Herschel Space Observatory and a deep near-infrared/optical survey with the Hubble Space Telescope (HST), and using measurements of the Sersic index of these galaxies derived from the HST images, we estimate that approximately 83% of the stellar mass-density formed over the history of the Universe occurred in LTGs. The difference between this and the fraction of the stellar mass-density that is in LTGs today implies there must have been a major transformation of LTGs into ETGs after the formation of most of the stars.
| Item Type: | Article |
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| Additional Information: | This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record MNRAS (October 01, 2015) 452 (4): 3489-3507 is available online at: http://dx.doi.org/10.1093/mnras/stv1300 |
| Uncontrolled Keywords: | 0201 Astronomical And Space Sciences |
| Subjects: | Q Science > QB Astronomy |
| Divisions: | Astrophysics Research Institute |
| Publisher: | Oxford University Press |
| Related URLs: | |
| Date Deposited: | 26 Oct 2015 14:24 |
| Last Modified: | 04 Sep 2021 14:08 |
| DOI or ID number: | 10.1093/mnras/stv1300 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/1719 |
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H-ATLAS/GAMA: Quantifying the Morphological Evolution of the Galaxy Population Using Cosmic Calorimetry. (deposited 24 Jun 2015 09:29)
- H-ATLAS/GAMA: Quantifying the Morphological Evolution of the Galaxy Population Using Cosmic Calorimetry. (deposited 26 Oct 2015 14:24) [Currently Displayed]
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