Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....112.1969o&link_type=abstract
Astronomical Journal v.112, p.1969
Astronomy and Astrophysics
Astronomy
36
Galaxies: Individual: Tucana, Galaxies: Abundances, Galaxies: Peculiar, Galaxies: Elliptical And Lenticular
Scientific paper
H I observations of the Local Group dwarf elliptical galaxy, Tucana, have been obtained with the Australia Telescope Compact Array. Within the optical extent of this galaxy, no H I was detected. The upper limit on the H I mass to blue luminosity ratio, M_HI_/L_B_ , is then ~10^-2^ for Tucana, a value similar to those of the Galactic dwarf spheroidal companions. This nondetection contrasts with the modest H I contents of Phoenix and LGS3, the other relatively isolated Local Group dwarfs with dominant old stellar populations. However, an H I cloud was detected, some 15' to the north-east of Tucana, at a heliocentric velocity of 130+/-2 km s^-1^. CCD observations of the central regions of this cloud, which has a maximum extent of ~20' x 10', did not reveal any obvious optical counterpart. The cloud has a faint tail of emission that points in the general direction of Tucana, and if it is at the same distance as the dE galaxy, then the H I mass is ~1.5 x 10^6^ M_sun_. We prefer the alternative interpretation that this H I cloud is a foreground high- velocity cloud, probably associated with the Magellanic Stream complex that pervades this part of the southern sky.
Da Costa Gary S.
Oosterloo Tom
Staveley--Smith Lister
No associations
LandOfFree
HI Observations of the Tucana Dwarf Elliptical Galaxy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with HI Observations of the Tucana Dwarf Elliptical Galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HI Observations of the Tucana Dwarf Elliptical Galaxy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1146177