TY - JOUR
AU - Zhao, Yong-Heng
AB - 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 $\lambda$4306 and H${\gamma}$$\lambda$4342 (vacuum wavelength), H${\beta}$$\lambda$4863 and Mg $\lambda$5177, 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.
TI - Fast Automatic Redshift Determination Using Absorption Lines Recognition
JF - Publications of the Astronomical Society of Japan
DO - 10.1093/pasj/63.6.1313
DA - 2011-12-25
UR - https://www.deepdyve.com/lp/oxford-university-press/fast-automatic-redshift-determination-using-absorption-lines-pqw3ZKYZdi
SP - 1313
EP - 1330
VL - 63
IS - 6
DP - DeepDyve
ER -