Evidence for a Massive, Extended Circumgalactic Medium Around the Andromeda Galaxy

@article{Lehner2014EvidenceFA,
  title={Evidence for a Massive, Extended Circumgalactic Medium Around the Andromeda Galaxy},
  author={N. Lehner and C. Howk and B. Wakker},
  journal={arXiv: Astrophysics of Galaxies},
  year={2014}
}
We demonstrate the presence of an extended and massive circumgalactic medium (CGM) around Messier 31 using archival HST COS ultraviolet spectroscopy of 18 QSOs projected within two virial radii of M31 (Rvir=300 kpc). We detect absorption from SiIII at -300 Rvir. We show that the M31 CGM gas is bound, multiphase, predominantly ionized (i.e., HII>>HI), and becomes more highly ionized gas at larger R. We estimate using SiII, SiIII, and SiIV a CGM metal mass of at least 2x10^6 Msun and gas mass of… Expand
The Circumgalactic Medium of Andromeda
  • N. Lehner
  • Physics
  • Proceedings of the International Astronomical Union
  • 2016
The COS-Halos Survey: Metallicities in the Low-redshift Circumgalactic Medium*
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 125 REFERENCES
The COS-Halos Survey: Physical Conditions and Baryonic Mass in the Low-redshift Circumgalactic Medium
Mining circumgalactic baryons in the low-redshift universe
Westerbork H I observations of high-velocity clouds near M 31 and M 33
...
1
2
3
4
5
...