Detection of HI associated with the Sculptor Dwarf Spheroidal Galaxy
Claude Carignan, Sylvie Beaulieu, Stephanie Cote, Serge Demers, Mario Mateo
Abstract
Neutral hydrogen (HI) has been detected in the Local Group dwarf spheroidal galaxy Sculptor with the 64 m Parkes single dish and mapped with the Australia Telescope synthesis array. Most of the detected HI is in two clouds 15'-20' away from the optical center. The gas is observed at the same systemic velocity than the stars but at 125 away from the Magellanic Stream components in that region. A lower limit to the HI mass of 3.0 × 104 is derived from the synthesis observation for an MHI/LB 0.02. This amount of HI is compatible with mass loss expected from normal giants even if only 10% of the gas is retained by the galaxy in its neutral form.
Create a lesson
Related papers
On binary pulsars and the force of gravity
Davor Palle
Tidal torques. A critical review of some techniques
Michael Efroimsky, James G. Williams
Dynamics of a Spherical Accretion Shock with Neutrino Heating and Alpha-Particle Recombination
Rodrigo Fernández, Christopher Thompson
Asymptotically FRW black holes
J. T. Firouzjaee, Reza Mansouri
Reaction of Accretion Disks to Abrupt Mass Loss During Binary Black Hole Merger
Sean M. O'Neill, M. Coleman Miller, Tamara Bogdanovic et al.
A Gamma-Ray Burst/Pulsar for Cosmic-Ray Positrons with a Dark Matter-like Spectrum
Kunihito Ioka