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Molecular gas and star formation in void galaxies

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dc.contributor.author Das, Mousumi
dc.contributor.author Saito, T
dc.contributor.author Iono, D
dc.contributor.author Honey, M
dc.contributor.author Ramya, S
dc.date.accessioned 2020-11-19T13:54:38Z
dc.date.available 2020-11-19T13:54:38Z
dc.date.issued 2016-10
dc.identifier.citation Proceedings of the International Astronomical Union, Vol. 308, pp. 610-613 en_US
dc.identifier.issn 978-3-319-19329-8
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7274
dc.description Restricted Access © International Astronomical Union http://dx.doi.org/10.1017/S174392131601067X en_US
dc.description.abstract We present the detection of molecular gas using CO(1–0) line emission and followup Hα imaging observations of galaxies located in nearby voids. The CO(1–0) observations were done using the 45m telescope of the Nobeyama Radio Observatory (NRO) and the optical observations were done using the Himalayan Chandra Telescope (HCT). Although void galaxies lie in the most underdense parts of our universe, a significant fraction of them are gas rich, spiral galaxies that show signatures of ongoing star formation. Not much is known about their cold gas content or star formation properties. In this study we searched for molecular gas in five void galaxies using the NRO. The galaxies were selected based on their relatively higher IRAS fluxes or Hα line luminosities. CO(1–0) emission was detected in four galaxies and the derived molecular gas masses lie between (1 - 8)×109 M⊙. The Hα imaging observations of three galaxies detected in CO emission indicates ongoing star formation and the derived star formation rates vary between from 0.2 – 1.0 M7odot; yr -1, which is similar to that observed in local galaxies. Our study shows that although void galaxies reside in underdense regions, their disks may contain molecular gas and have star formation rates similar to galaxies in denser environments en_US
dc.language.iso en en_US
dc.publisher International Astronomical Union en_US
dc.subject ISM: molecules en_US
dc.subject Galaxies: evolution en_US
dc.subject Galaxies: ISM en_US
dc.subject Cosmology: large-scale structure of universe en_US
dc.title Molecular gas and star formation in void galaxies en_US
dc.type Article en_US


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