Skip to main content

Research Repository

Advanced Search

H-ATLAS/GAMA and HeViCS – dusty early-type galaxies in different environments

Agius, N.K.; di Serego Alighieri, S.; Viaene, S.; Baes, M.; Sansom, A.E.; Bourne, N.; Bland-Hawthorn, J.; Brough, S.; Davis, T.A.; De Looze, I.; Driver, S.P.; Dunne, L.; Dye, S.; Eales, S.A.; Hughes, T.M.; Ivison, R.J.; Kelvin, L.S.; Maddox, S.; Mahajan, S.; Pappalardo, C.; Robotham, A.S.G.; Rowlands, K.; Temi, P.; Valiante, E.

Authors

N.K. Agius

S. di Serego Alighieri

S. Viaene

M. Baes

A.E. Sansom

N. Bourne

J. Bland-Hawthorn

S. Brough

T.A. Davis

I. De Looze

S.P. Driver

L. Dunne

SIMON DYE Simon.Dye@nottingham.ac.uk
Associate Professor

S.A. Eales

T.M. Hughes

R.J. Ivison

L.S. Kelvin

S. Maddox

S. Mahajan

C. Pappalardo

A.S.G. Robotham

K. Rowlands

P. Temi

E. Valiante



Abstract

The Herschel Space Observatory has had a tremendous impact on the study of extragalactic dust. Specifically, early-type galaxies (ETG) have been the focus of several studies. In this paper, we combine results from two Herschel studies – a Virgo cluster study Herschel Virgo Cluster Survey (HeViCS) and a broader, low-redshift Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS)/Galaxy and Mass Assembly (GAMA) study – and contrast the dust and associated properties for similar mass galaxies. This comparison is motivated by differences in results exhibited between multiple Herschel studies of ETG. A comparison between consistent modified blackbody derived dust mass is carried out, revealing strong differences between the two samples in both dust mass and dust-to-stellar mass ratio. In particular, the HeViCS sample lacks massive ETG with as high a specific dust content as found in H-ATLAS. This is most likely connected with the difference in environment for the two samples. We calculate nearest neighbour environment densities in a consistent way, showing that H-ATLAS ETG occupy sparser regions of the local Universe, whereas HeViCS ETG occupy dense regions. This is also true for ETG that are not Herschel-detected but are in the Virgo and GAMA parent samples. Spectral energy distributions are fit to the panchromatic data. From these, we find that in H-ATLAS the specific star formation rate anticorrelates with stellar mass and reaches values as high as in our Galaxy. On the other hand HeViCS ETG appear to have little star formation. Based on the trends found here, H-ATLAS ETG are thought to have more extended star formation histories and a younger stellar population than HeViCS ETG.

Journal Article Type Article
Publication Date Jun 29, 2015
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 451
Issue 4
APA6 Citation Agius, N., di Serego Alighieri, S., Viaene, S., Baes, M., Sansom, A., Bourne, N., …Valiante, E. (2015). H-ATLAS/GAMA and HeViCS – dusty early-type galaxies in different environments. Monthly Notices of the Royal Astronomical Society, 451(4), https://doi.org/10.1093/mnras/stv1191
DOI https://doi.org/10.1093/mnras/stv1191
Keywords methods: statistical, galaxies: elliptical and lenticular, cD, galaxies: evolution, submillimetre: galaxies
Publisher URL https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stv1191
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Files

stv1191.pdf (2.7 Mb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





You might also like



Downloadable Citations

;