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Titolo: INFRARED EMISSION-LINE GALAXIES ASSOCIATED WITH DAMPED LY-ALPHA AND STRONG METAL ABSORBER REDSHIFTS
Autore: MANNUCCI F; THOMPSON D; BECKWITH SVW; WILLIGER GM;
- Indirizzi:
- CNR,CTR ASTRON INFRAROSSA & STUDIO MEZZO INTERSTELLAR FLORENCE ITALY MAX PLANCK INST ASTRON D-69117 HEIDELBERG GERMANY NASA,GODDARD SPACE FLIGHT CTR GREENBELT MD 20771
- Titolo Testata:
- The Astrophysical journal
fascicolo: 1,
volume: 501,
anno: 1998,
parte:, 2
pagine: 11 - 15
- SICI:
- 0004-637X(1998)501:1<11:IEGAWD>2.0.ZU;2-7
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- ABSORPTION SYSTEMS; STAR FORMATION; OBJECT; IDENTIFICATION;
- Keywords:
- COSMOLOGY, OBSERVATIONS; EARLY UNIVERSE; GALAXIES, FORMATION; INFRARED, GALAXIES;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Science Citation Index Expanded
- Citazioni:
- 33
- Recensione:
- Indirizzi per estratti:
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- Citazione:
- F. Mannucci et al., "INFRARED EMISSION-LINE GALAXIES ASSOCIATED WITH DAMPED LY-ALPHA AND STRONG METAL ABSORBER REDSHIFTS", The Astrophysical journal, 501(1), 1998, pp. 11-15
Abstract
Eighteen candidates for emission-line galaxies were discovered in a narrowband infrared survey that targeted the redshifts of damped Ly alpha or metal lines in the spectra of quasars. The presence of emission lines is inferred from the photometric magnitudes in narrowband and broadband interference filters, corresponding to H alpha at redshifts of0.89 (six objects) and 2.4 (10 objects) and to [O II] lambda 3727 at a redshift of 2.3 (two objects). Most of the candidates are small, resolved objects that are compatible with galaxies at the redshifts of the damped Ly alpha absorbers. Because a similar survey, targeted at theredshifts of quasars themselves, uncovered only one emission-line galaxy in a larger volume, the results imply substantial clustering of young galaxies or a formation within filaments or sheets whose locationsare indicated by the redshifts of strong Ly alpha line absorption along the lines of sight to more distant quasars.
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Documento generato il 18/06/13 alle ore 08:51:43