Physics
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20753b&link_type=abstract
Spitzer Proposal ID #20753
Physics
Scientific paper
We have discovered extended Lyman-alpha emission around a z=4.5 QSO in a deep long-slit spectrum with Keck/LRIS. The line emission extends 5arcsec beyond the continuum of the QSO and is spatially asymmetric. This extended line emission has a spectral extent of 1000km/s, much narrower in velocity spread than the broad Lyman-alpha from the QSO itself and slightly offset in redshift. No evidence of continuum is seen for the extended emission line region. This phenomenon is rare in QSOs which are not radio loud, and this is the first time it has been observed at z>4. It is possible that the QSO is illuminating the surrounding cold gas of the host galaxy, with the ionizing photons producing Lyman-alpha fluorescence. As suggested by Haiman & Rees (2001), this "fuzz" around a distant quasar may place strong constraints on galaxy formation and the extended distribution of cold, neutral gas. Alternatively, the Lyman-alpha may be powered locally by star formation in a galaxy-wide starburst. By searching for stellar continuum at longer wavelengths with IRAC, we can discriminate between these theories. We have also discovered a Lyman-alpha "blob" at the QSO redshift and only 23arcsec (150kpc) away: MIPS imaging will reveal whether this is a ULIRG-like buried source, or if it is being photoionized by the QSO.
Bunker Andrew
Stern Daniel
No associations
LandOfFree
The origin of extended Lyman-alpha around a z=4.5 QSO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The origin of extended Lyman-alpha around a z=4.5 QSO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The origin of extended Lyman-alpha around a z=4.5 QSO will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1167956