Open AccessA wide‐field H i study of the NGC 1566 group
Author(s) -
Kilborn Virginia A.,
Koribalski Bärbel S.,
Forbes Duncan A.,
Barnes David G.,
Musgrave Ruth C.
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.1365-2966.2004.08450.x
Subject(s) - physics , intergalactic travel , astrophysics , galaxy group , galaxy , telescope , dark galaxy , peculiar galaxy , luminous infrared galaxy , dwarf galaxy , intergalactic medium , compact group , elliptical galaxy , astronomy , redshift , mathematics , geometry , lie group
We report on neutral hydrogen observations of a ∼ 5.5 × 5.5 deg 2 field around the NGC 1566 galaxy group with the multibeam narrow‐band system on the 64‐m Parkes Telescope. We detected 13 H i sources in the field, including two galaxies not previously known to be members of the group, bringing the total number of confirmed galaxies in this group to 26. Each of the H i galaxies can be associated with an optically catalogued galaxy. No ‘intergalactic H i clouds’ were found to an H i mass limit of ∼3.5 × 10 8 M ⊙ . We have estimated the expected H i content of the late‐type galaxies in this group and find that the total detected H i is consistent with our expectations. However, while no global H i deficiency is inferred for this group, two galaxies exhibit individual H i deficiencies. Further observations are needed to determine the gas removal mechanisms in these galaxies.