(WFRF:(Gallazzi A.))
Search: (WFRF:(Gallazzi A.)) > (2013) > On the two high-met...
- 1 of 1
- Previous record
- Next record
- To hitlist
On the two high-metallicity DLAs at z=2.412 and 2.583 towards Q 0918+1636
- Fynbo, J. P. U. (author)
- Geier, S. J. (author)
- Christensen, L. (author)
- show more...
- Gallazzi, A. (author)
- Krogager, J. -K (author)
- Kruehler, T. (author)
- Ledoux, C. (author)
- Maund, J. R. (author)
- Moller, P. (author)
- Noterdaeme, P. (author)
- Vestergaard, M. (author)
- show less...
- (creator_code:org_t)
- 2013-09-20
- 2013
- English.
- In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 436:1, s. 361-370
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- The quasar Q0918+1636 (z = 3.07) has two intervening high-metallicity Damped Lyman a Absorbers (DLAs) along the line of sight, at redshifts of z = 2.412 and 2.583. The z = 2.583 DLA is located at a large impact parameter of 16.2 kpc, and despite this large impact parameter it has a very high metallicity (consistent with solar), a substantial fraction of H-2 molecules and it is dusty as inferred from the reddened spectrum of the background QSO. The z = 2.412 DLA has a metallicity of [M/H] = -0.6 (based on Zn II and Si II). In this paper we present new observations of this interesting sightline consisting of deep multiband imaging and further VLT spectroscopy. By fitting stellar population synthesis models to the photometric Spectral Energy Distribution we constrain the physical properties of the z = 2.583 DLA galaxy, and we infer its morphology by fitting a Sersic model to its surface brightness profile. We find it to be a relatively massive (M-* approximate to 10(10) M-circle dot), strongly star-forming (SFR approximate to 30 M-circle dot yr(-1)), dusty (E(B - V) = 0.4) galaxy with a disc-like morphology. We detect strong emission lines from the z = 2.583 DLA ([O II] lambda 3727, [O III] lambda lambda 4960, 5007, H beta and H alpha, albeit at low signal-to-noise ratio except for the [O III] lambda 5007 line). The metallicity derived from the emission lines is consistent with the absorption metallicity (12 + log (O/H) = 8.8 +/- 0.2). We also detect [O III] lambda 5007 emission from the galaxy counterpart of the z = 2.412 DLA at a small impact parameter (<2 kpc). Overall our findings are consistent with the emerging picture that high-metallicity DLAs are associated with relatively luminous and massive galaxy counterparts, compared to typical DLAs.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: formation
- galaxies: high-redshift
- galaxies: ISM-quasars: absorption lines
- quasars: individual: SDSS J 091826.16+163609.0
- cosmology: observations
- Astronomy
- astronomi
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Monthly notices of the Royal Astronomical Society (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Fynbo, J. P. U.
- Geier, S. J.
- Christensen, L.
- Gallazzi, A.
- Krogager, J. -K
- Kruehler, T.
- show more...
- Ledoux, C.
- Maund, J. R.
- Moller, P.
- Noterdaeme, P.
- Rivera-Thorsen, ...
- Vestergaard, M.
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Astronomy Astrop ...
- Articles in the publication
- Monthly notices ...
- By the university
- Stockholm University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
