SIMBAD references

2005A&A...444..133T - Astronomy and Astrophysics, volume 444, 133-136 (2005/12-2)

The HI content of the recently discovered field dwarf galaxy NAME APPLES 1.

TARCHI A., OTT J., PASQUALI A., FERRERAS I., CASTANGIA P. and LARSEN S.S.

Abstract (from CDS):

We present observations in a search for neutral hydrogen associated with the recently detected field dwarf galaxy APPLES 1, performed with the Parkes radiotelescope. The observed radio spectrum shows no evident (>3σ rms) line emission indicating an upper limit for the HI content of the galaxy of ∼106M and providing an upper value for the MHI/LB ratio equal to 2.4M/L. The low value of the HI content suggested by the observations, together with the galaxy optical morphology, might indicate that APPLES 1 is a dwarf spheroidal. This indication is in contrast with the evidence of recent star formation, which is typical for dwarf irregular galaxies. This may suggest that APPLES 1 belongs to the class of mixed dwarf irregular/spheroidal transition-type galaxies. We also conclude that the relatively low neutral gas mass in APPLES 1 can be explained by an extended and inefficient star formation process, without the need for a dramatic event such as enhanced star formation or a past encounter with a massive galaxy or galaxy group.

Abstract Copyright:

Journal keyword(s): galaxies: individual: APPLES 1 - galaxies: dwarf - radio lines: ISM - radio lines: galaxies

Simbad objects: 22

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2019.09.15-22:57:05

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