Galaxy and Mass Assembly (GAMA): time-scales for galaxies crossing the green valley. Issue 4 (16th March 2019)
- Record Type:
- Journal Article
- Title:
- Galaxy and Mass Assembly (GAMA): time-scales for galaxies crossing the green valley. Issue 4 (16th March 2019)
- Main Title:
- Galaxy and Mass Assembly (GAMA): time-scales for galaxies crossing the green valley
- Authors:
- Phillipps, S
Bremer, M N
Hopkins, A M
De Propris, R
Taylor, E N
James, P A
Davies, L J M
Cluver, M E
Driver, S P
Eales, S A
Holwerda, B W
Kelvin, L S
Sansom, A E - Abstract:
- Abstract: We explore the constraints that can be placed on the evolutionary time-scales for typical low-redshift galaxies evolving from the blue cloud through the green valley and on to the red sequence. We utilize galaxies from the GAMA survey with 0.1 < z < 0.2 and classify them according to the intrinsic ( u * − r *) colours of their stellar populations, as determined by fits to their multiwavelength spectral energy distributions. Using these fits to also determine stellar population ages and star formation time-scales, we argue that our results are consistent with a green valley population dominated by galaxies that are simply decreasing their star formation (running out of gas) over a time-scale of 2–4 Gyr which are seen at a specific epoch in their evolution (approximately 1.6 e-folding times after their peak in star formation). If their fitted star formation histories are extrapolated forward, the green galaxies will further redden over time, until they attain the colours of a passive population. In this picture, no specific quenching event which cuts-off their star formation is required, though it remains possible that the decline in star formation in green galaxies may be expedited by internal or external forces. However, there is no evidence that green galaxies have recently changed their star formation time-scales relative to their previous longer term star formation histories.
- Is Part Of:
- Monthly notices of the Royal Astronomical Society. Volume 485:Issue 4(2019)
- Journal:
- Monthly notices of the Royal Astronomical Society
- Issue:
- Volume 485:Issue 4(2019)
- Issue Display:
- Volume 485, Issue 4 (2019)
- Year:
- 2019
- Volume:
- 485
- Issue:
- 4
- Issue Sort Value:
- 2019-0485-0004-0000
- Page Start:
- 5559
- Page End:
- 5572
- Publication Date:
- 2019-03-16
- Subjects:
- galaxies: evolution -- galaxies: star formation -- galaxies: stellar content -- galaxies: structure
Astronomy -- Periodicals
Periodicals
520.5 - Journal URLs:
- http://mnras.oxfordjournals.org/ ↗
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2966 ↗
http://www.blackwell-synergy.com/issuelist.asp?journal=mnr ↗
http://www.blackwell-synergy.com/loi/mnr ↗
http://ukcatalogue.oup.com/ ↗ - DOI:
- 10.1093/mnras/stz799 ↗
- Languages:
- English
- ISSNs:
- 0035-8711
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5943.000000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 11994.xml