Detection of H [CSC]i[/CSC] Associated with the Sculptor Dwarf Spheroidal Galaxy | Zendy

C. Carignan | Zendy; S. F. Beaulieu | Zendy; Stéphanie Côté | Zendy; S. Demers | Zendy; Mario Mateo | Zendy

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Detection of H [CSC]i[/CSC] Associated with the Sculptor Dwarf Spheroidal Galaxy

Author(s) -

C. Carignan,

S. F. Beaulieu,

Stéphanie Côté,

S. Demers,

Mario Mateo

Publication year - 1998

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/300540

Subject(s) - physics , galaxy , telescope , irregular galaxy , dwarf galaxy , astrophysics , dwarf spheroidal galaxy , local group , astronomy , stars , interacting galaxy

Neutral hydrogen (HI) has been detected in the Local Group dwarf spheroidalgalaxy Sculptor with the 64 m Parkes single dish and mapped with the AustraliaTelescope synthesis array. Most of the detected HI is in two clouds \sim15'-20' away from the optical center. The gas is observed at the same systemicvelocity than the stars but at \ge 125 \kms away from the Magellanic Streamcomponents in that region. A lower limit to the HI mass of 3.0 \times 10^4\Msol is derived from the synthesis observation for an M_HI/L_B \simeq 0.02.This amount of HI is compatible with mass loss expected from normal giants evenif only 10% of the gas is retained by the galaxy in its neutral form.Comment: 17 pages (aas2pp4.sty) including all 5 tables and 8 postscript figures. Accepted for publication in A

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