Gas inflow and nuclear star formation in galaxies with non-axisymmetric bulges

E. Kim, S. S. Kim, G. H. Lee, M. G. Lee, R. De Grijs

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

We present the dependence of the amount of nuclear star formation on the non-axisymmetry of a bulge of disk galaxies. For this, we use a volume-limited sample of spiral galaxies at 0.02 < = z < 0.055 from the SDSS DR7. Among 3173 final sample galaxies with an axis ratio b/a > 0.6 and a bulge fraction ranged in B/T <= 0.41, nuclear starburst galaxies are 10%. We find that a fraction of the nuclear starburst galaxies become higher when ellipticity of a bulge increases in early type galaxies. Also, the fraction increases clearly when early type galaxies are isolated and in low density region. Our results indicate that the non-axisymmetry of bulges assists gas to fall inside and affects the nuclear starburst process in disk galaxies.

Original languageEnglish
Title of host publicationThe galactic center : feeding and feedback in a normal galactic nucleus
Subtitle of host publicationproceedings of the 303rd Symposium of the International Astronomical Union, held in Santa Fe, NM, USA, September 30-October 4, 2013
EditorsLoránt O. Sjouwerman, Cornelia C. Lang, Jürgen Ott
Place of PublicationCambridge
PublisherCambridge University Press (CUP)
Pages171-173
Number of pages3
ISBN (Print)9781107044616
DOIs
Publication statusPublished - 2014
Externally publishedYes
EventThe 303rd Symposium of the International Astronomical Union - Santa Fe, United States
Duration: 30 Sep 20134 Oct 2013

Publication series

NameIAU symposium
PublisherCambridge University Press
Number303
ISSN (Print)1743-9213

Conference

ConferenceThe 303rd Symposium of the International Astronomical Union
CountryUnited States
CitySanta Fe
Period30/09/134/10/13

Keywords

  • Galaxies: starburst
  • Galaxies:sprial
  • Galaxy:bulge

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