Star formation in nearby early-type galaxies

Mapping in UV, optical, and CO

Martin Bureau*, Roland Bacon, Michele Cappellari, Francoise Combes, R. L. Davies, P. T. Zeeuw, Eric Emsellem, J. Falcon-Barroso, Hyunjin Jeong, Davor Krajnovic, Harald Kuntschner, R. M. McDermid, Reynier F. Peletier, Marc Sarzi, Kristen L. Shapiro, Glenn van de Ven, Sukyoung K. Yi, Lisa M. Young

*Corresponding author for this work

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

Abstract

The SAURON integral-field survey reveals that small (∼0.1,Re) kinematically decoupled cores (KDCs) in early-type galaxies are increasingly young toward the center and are typically found in fast-rotating galaxies, while large KDCs (∼0.5 Re) have homogeneously old stars and are present in non-rotating galaxies (McDermid et al. 2006). GALEX UV imaging further allows the direct identification of regions of recent star formation (0.5 Gyr). In NGC 2974 for example, young stars are identified in the center and an outer ring Jeong et al. 2006). Nuclear and inner ionised-gas rings (Sarzi et al. 2006) then suggest that current star formation is bar-driven. The CO detection rate of SAURON early-type galaxies is 40% (Combes et al. in prep.). Synthesis imaging reveals that it is generally contained in a well-ordered central disk, both in galaxies with a (young) central stellar disk (e.g. NGC 4459, NGC 4526) or a (young) KDC (e.g. NGC 3032, NGC 4150) (Young et al. in prep.). CO also traces well the young stellar populations and ionised gas distribution and kinematics, but in KDCs not always the stellar kinematics Emsellem et al. 2004; Sarzi et al. 2006; Kuntschner et al. 2006). © 2007 International Astronomical Union.
Original languageEnglish
Title of host publicationMapping the galaxy and nearby galaxies
EditorsKeichii Wada, Francoise Combes
Place of PublicationBerlin, Germany
PublisherSpringer, Springer Nature
Pages312-312
Number of pages1
ISBN (Print)978-0-387-72767-7, 978-1-4419-2495-7
Publication statusPublished - 2008
Externally publishedYes
EventSymposium on Mapping the Galaxy and Nearby Galaxies - Ishigaki Isl, Japan
Duration: 26 Jun 200630 Jun 2006

Publication series

NameAstrophysics and Space Science Proceedings
PublisherSPRINGER
ISSN (Print)1570-6591

Conference

ConferenceSymposium on Mapping the Galaxy and Nearby Galaxies
CountryJapan
CityIshigaki Isl
Period26/06/0630/06/06

Keywords

  • LENTICULAR GALAXIES
  • SAURON PROJECT
  • LINE KINEMATICS

Cite this

Bureau, M., Bacon, R., Cappellari, M., Combes, F., Davies, R. L., Zeeuw, P. T., ... Young, L. M. (2008). Star formation in nearby early-type galaxies: Mapping in UV, optical, and CO. In K. Wada, & F. Combes (Eds.), Mapping the galaxy and nearby galaxies (pp. 312-312). (Astrophysics and Space Science Proceedings). Berlin, Germany: Springer, Springer Nature.