Can I read Identifying Circumgalactic Medium Absorption in QSO Spectra: A Bayesian Approach on EtoBox?

Identifying Circumgalactic Medium Absorption in QSO Spectra: A Bayesian Approach by Scott, Jennifer E.; Shoemaker, Emileigh S.; Hamill, Colin D. is a scholarly article available to read on EtoBox.

What is Identifying Circumgalactic Medium Absorption in QSO Spectra: A Bayesian Approach about?

We present a study of candidate galaxy-absorber pairs for 43 low redshift QSO sightlines ($0.06 < z < 0.85$) observed with the {\it Hubble Space Telescope}/Cosmic Origins Spectrograph that lie within the footprint of the Sloan Digital Sky Survey with a statistical approach to match absorbers with galaxies near the QSO lines of sight using only the SDSS Data Release 12 photometric data for the galaxies, including estimates of their redshifts. Our Bayesian methods combine the SDSS photometric information with measured properties of the circumgalactic medium to find the most probable galaxy match, if any, for each absorber in the line of sight QSO spectrum. We find $\sim$630 candidate galaxy-absorber pairs using two different statistics. The methods are able to reproduce pairs reported in the targeted spectroscopic studies upon which we base the statistics at a rate of 72\%. The properties of the galaxies comprising the candidate pairs have median redshift, luminosity, and stellar mass, all estimated from the photometric data, $z=0.13$, $L=0.1L^*$, and $\log(M_*/M_{Sun}) = 9.7$. The median impact parameter of the candidate pairs is $\sim$430~kpc, or $\sim 3.5$ times the galaxy virial

Author

Scott, Jennifer E.; Shoemaker, Emileigh S.; Hamill, Colin D.

Published

2021

Language

EN