A High Velocity Cloud Detected Towards M13

Barry Y. Welsh (1) , Rosine Lallement (2) , Jonathan Wheatley (1)

1 UC Berkeley - University of California [Berkeley]
2 HELIOS - LATMOS

We present HST-COS observations of the interstellar sight-line towards the M13 globular cluster. High velocity gas at V -120 km/s and intermediate velocity gas at V -65 km/s has been detected in many UV absorption lines. The HVC gas is probably associated with the Complex K IVC with a distance of 1.0 < z < 4.7 kpc. This would place the infalling HVC gas far closer than previous estimates of HV clouds surrounding our Galaxy.

Domaines: Astrophysique [astro-ph]

Barry Y. Welsh, Rosine Lallement, Jonathan Wheatley. A High Velocity Cloud Detected Towards M13. American Astronomical Society, AAS Meeting #217, Jan 2011, Seattle, WA, United States. ⟨hal-03743907⟩