Open AccessA search for H i in some peculiar faint dwarf galaxies
Author(s) -
Begum Ayesha,
Chengalur Jayaram N.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09342.x
Subject(s) - giant metrewave radio telescope , physics , astrophysics , dwarf galaxy , galaxy , dwarf spheroidal galaxy , astronomy , green bank telescope , radio galaxy , interacting galaxy
We present a deep Giant Metrewave Radio Telescope (GMRT) search for H i 21‐cm emission from three dwarf galaxies, viz. POX 186, SC 24 and KKR 25. Based, in part, on previous single‐dish H i observations, these galaxies have been classified as a blue compact dwarf (BCD), a dwarf irregular and a transition galaxy, respectively. However, in conflict with previous single‐dish detections, we do not detect H i in SC 24 or KKR 25. We suggest that the previous single‐dish measurements were probably confused with the local Galactic emission. In the case of POX 186, we confirm the previous non‐detection of H i but with substantially improved limits on its H i mass. Our derived upper limits on the H i mass of SC 24 and KKR 25 are similar to the typical H i mass limit for dwarf spheroidal (dSph) galaxies, whereas in the case of POX 186, we find that its gas content is somewhat smaller than is typical of BCD galaxies.