Abstract Details
| Name: Alka Mishra Affiliation: Aryabhatta Research Institute of Observational Sciences (ARIES) Conference ID: ASI2016_546 Title : HI gas content in Giant Low Surface Brightness (LSB) Galaxies Authors and Co-Authors : N. G. Kantharia, National Centre for Radio Astrophysics (NCRA-TIFR), Pune Mousumi Das, Indian Institute of Astrophysics, Bangalore Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : In this paper we study the 21cm HI line emission from four low surface brightness (LSB) galaxies. The observations made using the Giant Metrewave Radio Telescope. LSB galaxies are generally large, dark matter dominated spirals that have low star formation efficiencies and large HI gas disks. Their properties suggest that they are less evolved compared to high surface brightness galaxies. We present GMRT HI emission maps of LSB galaxies with an optically-identified active nucleus. Using our HI data and data from literature , near-infrared (2MASS) and near-ultraviolet (GALEX), we studied morphology, kinematics and star formation efficiencies in these galaxies. The HI emission of three galaxies; UGC 1922, UGC 4422 and UM 163 show HI disks of similar extent to stellar disk whereas UGC 1378 shows extended HI disk. All the sample galaxies show asymmetric HI distribution and rotating disk. The HI masses in the observed galaxies are ≥ 10^10 M⊙ . |