QSOs Lyman alpha emission line spectra (Kramer+, 2009)

Details QSOs Lyman alpha emission line spectra (Kramer+, 2009) QSOs Lyman alpha emission line spectra (Kramer+, 2009)

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ycat..74001493k&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/400/1493. Originally published in: 2009MNRAS.400.1493K

Physics

Qsos, Spectra: Ultraviolet, Equivalent Widths

Scientific paper

Arguably the best hope of understanding the tail end of the re-ionization of the intergalactic medium (IGM) at redshift z>6 is through the detection and characterization of the Gunn-Peterson damping wing absorption of the IGM in bright quasar spectra. However, the use of quasar spectra to measure the IGM damping wing requires a model of the quasar's intrinsic Lymanα emission line. Here we quantify the uncertainties in the intrinsic line shapes, and how those uncertainties affect the determination of the IGM neutral fraction. We have assembled a catalogue of high-resolution Hubble Space Telescope spectra of the emission lines of unobscured low-redshift quasars, and have characterized the variance in the shapes of their lines. We then add simulated absorption from the high-redshift IGM to these quasar spectra in order to determine the corresponding uncertainties in re-ionization constraints using current and future samples of z>6 quasar spectra. We find that, if the redshift of the Lymanα emission line is presumed to coincide with the systemic redshift determined from metal lines, the inferred IGM neutral fraction is systematically biased to low values due to a systematic blueshift of the Lymanα line relative to the metal lines.
(3 data files).

Affiliated with

Also associated with

No associations

Rating

QSOs Lyman alpha emission line spectra (Kramer+, 2009) 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 QSOs Lyman alpha emission line spectra (Kramer+, 2009), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QSOs Lyman alpha emission line spectra (Kramer+, 2009) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1565276