Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011pasj...63.1313h&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.63, No.6, pp.1313-1330
Astronomy and Astrophysics
Astronomy
Cosmology: Distance Scale, Cosmology: Observations, Methods: Data Analysis, Techniques: Spectroscopic
Scientific paper
To precisely measure the redshifts of non-ELGs (ELGs: emission-line galaxies), weaker-ELGs and galaxies with only one emission line that is clearly visible in the optical band, a fast automatic redshift determination algorithm (FRA) is proposed, which is different from the widely used cross-correlation method. The algorithm has higher speed because it determines the redshift by extracting and recognizing two pairs of prominent absorption lines in the blue band of a spectrum, G-band λ4306 and Hγ λ4342 (vacuum wavelength), Hβ λ4863 and Mg λ5177, rather than through matching an observational galaxy spectrum with the complete galaxy templates. Moreover, a wide range of redshift measurements from 0 to 0.65 and relatively high success rates can be reached by FRA. For spectra with a relatively wide wavelength range and with a resolution above R = 1000, FRA is an efficient automatic algorithm that can be used in spectra redshift surveys with large amounts of data.
Han Jin-Shu
Luo A.-Li
Zhao Yong-Heng
No associations
LandOfFree
Fast Automatic Redshift Determination Using Absorption Lines Recognition 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 Fast Automatic Redshift Determination Using Absorption Lines Recognition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fast Automatic Redshift Determination Using Absorption Lines Recognition will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1438598