A redline starburst: CO(2-1) observations of an Eddington-limited galaxy reveal star formation at its most extreme
View/ Open
Author
Geach, J. E.
Hickox, R. C.
Diamond-Stanic, A. M.
Krips, M.
Moustakas, J.
Tremonti, C. A.
Coil, A. L.
Sell, P. H.
Rudnick, G. H.
Attention
2299/10755
Abstract
We report observations of the CO(2-1) emission of SDSS J1506+54, a compact (r(e) approximate to 135 pc) starburst galaxy at z = 0.6. SDSS J1506+ 54 appears to be forming stars close to the limit allowed by stellar radiation pressure feedback models: the measured L-IR/L-CO' approximate to 1500 is one of the highest measured for any galaxy. With its compact optical morphology but extended low surface brightness envelope, post-starburst spectral features, high infrared luminosity (L-IR > 10(12.5) L-circle dot), low gas fraction (M-H2 /M-star approximate to 15%), and short gas depletion time (tens of Myr), we speculate that this is a feedback-limited central starburst episode at the conclusion of a major merger. Taken as such, SDSS J1504+54 epitomizes the brief closing stage of a classic model of galaxy growth: we are witnessing a key component of spheroid formation during what we term a "redline" starburst.
Publication date
2013-04-10Published in
Astrophysical Journal LettersPublished version
https://doi.org/10.1088/2041-8205/767/1/L17Other links
http://hdl.handle.net/2299/10755Metadata
Show full item recordRelated items
Showing items related by title, author, creator and subject.
-
The H alpha galaxy survey. I. The galaxy sample, H alpha narrow-band observations and star formation parameters for 334 galaxies
James, P.A.; Shane, N.S.; Beckman, J.E.; Cardwell, A.; Collins, C.A.; Etherton, J.; de Jong, R.S.; Fathi, K.; Knapen, J.; Peletier, R.F.; Percival, S.M.; Pollacco, D.L.; Seigar, M.S.; Stedman, S. (2004)We discuss the selection and observations of a large sample of nearby galaxies, which we are using to quantify the star formation activity in the local Universe. The sample consists of 334 galaxies across all Hubble types ... -
On the Key Processes that Drive Galaxy Evolution: the Role of Galaxy Mergers, Accretion, Local Environment and Feedback in Shaping the Present-Day Universe
Martin, Garreth (2019-07-17)The study of galaxy evolution is a fundamental discipline in modern astrophysics, dealing with how and why galaxies of all types evolve over time. The diversity of present-day galaxies is a reflection of the processes ... -
Circumnuclear regions in barred spiral galaxies - II. Relations to host galaxies
Knapen, J.; Perez-Ramirez, D.; Laine, S. (2002-12)