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The Herschel Virgo Cluster survey, X: the relationship between cold dust and molecular gas content in Virgo spirals

E Corbelli, S Bianchi, L Cortese, C Giovanardi, L Magrini, C Pappalardo, A Boselli, GJ Bendo, J Davies and M Grossi, et al. (2012) ASTRONOMY & ASTROPHYSICS. 542.
abstract
Aims. We examine whether dust mass can trace the total or molecular gas mass in late-type Virgo cluster galaxies, and how the environment affects the dust-to-gas ratio and the molecular fraction. Methods. Using the far-infrared emission, as observed by the Herschel Virgo Cluster Survey (HeViCS), and the integrated HI 21-cm and CO J = 1-0 line brightness, we infer the dust and total gas mass for a magnitude limited sample of 35 metal rich spiral galaxies. Environmental disturbances on each galaxy are considered by means of the HI deficiency parameter. Results. The CO flux correlates tightly and linearly with far-infrared fluxes observed by Herschel, especially with the emission at 160, 250 and 350 mu m. Molecules in these galaxies are more closely related to cold dust rather than to dust heated by star formation or to optical/NIR brightness. We show that dust mass establishes a stronger correlation with the total gas mass than with the atomic or molecular component alone. The correlation is non-linear since lower mass galaxies have a lower dust-to-gas ratio. The dust-to-gas ratio increases as the HI deficiency increases, but in highly HI deficient galaxies it stays constant. Dust is in fact less affected than atomic gas by weak cluster interactions, which remove most of the HI gas from outer and high latitudes regions. Highly disturbed galaxies, in a dense cluster environment, can instead loose a considerable fraction of gas and dust from the inner regions of the disk keeping constant the dust-to-gas ratio. There is evidence that the molecular phase is also quenched. This quencing becomes evident by considering the molecular gas mass per unit stellar mass. Its amplitude, if confirmed by future studies, highlights that molecules are missing in Virgo HI deficient spirals, but to a somewhat lesser extent than dust.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
MASS-METALLICITY RELATION, GAMMA-RAY EMISSION, CO-TO-H-2 CONVERSION FACTOR, STAR-FORMING GALAXIES, extinction, dust, infrared: galaxies, ISM: molecules, galaxies: clusters: general, galaxies: clusters: individual: Virgo, LOCAL GROUP, DWARF GALAXIES, ATOMIC GAS, NEARBY CLUSTERS, MILKY-WAY, HYDROGEN
journal title
ASTRONOMY & ASTROPHYSICS
Astron. Astrophys.
volume
542
article_number
A32
pages
11 pages
Web of Science type
Article
Web of Science id
000305803300012
JCR category
ASTRONOMY & ASTROPHYSICS
JCR impact factor
5.084 (2012)
JCR rank
11/56 (2012)
JCR quartile
1 (2012)
ISSN
0004-6361
DOI
10.1051/0004-6361/201117329
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
3001499
handle
http://hdl.handle.net/1854/LU-3001499
date created
2012-09-28 15:45:34
date last changed
2015-05-19 11:04:48
@article{3001499,
  abstract     = {Aims. We examine whether dust mass can trace the total or molecular gas mass in late-type Virgo cluster galaxies, and how the environment affects the dust-to-gas ratio and the molecular fraction. 
Methods. Using the far-infrared emission, as observed by the Herschel Virgo Cluster Survey (HeViCS), and the integrated HI 21-cm and CO J = 1-0 line brightness, we infer the dust and total gas mass for a magnitude limited sample of 35 metal rich spiral galaxies. Environmental disturbances on each galaxy are considered by means of the HI deficiency parameter. 
Results. The CO flux correlates tightly and linearly with far-infrared fluxes observed by Herschel, especially with the emission at 160, 250 and 350 mu m. Molecules in these galaxies are more closely related to cold dust rather than to dust heated by star formation or to optical/NIR brightness. We show that dust mass establishes a stronger correlation with the total gas mass than with the atomic or molecular component alone. The correlation is non-linear since lower mass galaxies have a lower dust-to-gas ratio. The dust-to-gas ratio increases as the HI deficiency increases, but in highly HI deficient galaxies it stays constant. Dust is in fact less affected than atomic gas by weak cluster interactions, which remove most of the HI gas from outer and high latitudes regions. Highly disturbed galaxies, in a dense cluster environment, can instead loose a considerable fraction of gas and dust from the inner regions of the disk keeping constant the dust-to-gas ratio. There is evidence that the molecular phase is also quenched. This quencing becomes evident by considering the molecular gas mass per unit stellar mass. Its amplitude, if confirmed by future studies, highlights that molecules are missing in Virgo HI deficient spirals, but to a somewhat lesser extent than dust.},
  articleno    = {A32},
  author       = {Corbelli, E and Bianchi, S and Cortese, L and Giovanardi, C and Magrini, L and Pappalardo, C and Boselli, A and Bendo, GJ and Davies, J and Grossi, M and Madden, SC and Smith, MWL and Vlahakis, C and Auld, R and Baes, Maarten and De Looze, Ilse and Fritz, Jacopo and Pohlen, M and Verstappen, Joris},
  issn         = {0004-6361},
  journal      = {ASTRONOMY \& ASTROPHYSICS},
  keyword      = {MASS-METALLICITY RELATION,GAMMA-RAY EMISSION,CO-TO-H-2 CONVERSION FACTOR,STAR-FORMING GALAXIES,extinction,dust,infrared: galaxies,ISM: molecules,galaxies: clusters: general,galaxies: clusters: individual: Virgo,LOCAL GROUP,DWARF GALAXIES,ATOMIC GAS,NEARBY CLUSTERS,MILKY-WAY,HYDROGEN},
  language     = {eng},
  pages        = {11},
  title        = {The Herschel Virgo Cluster survey, X: the relationship between cold dust and molecular gas content in Virgo spirals},
  url          = {http://dx.doi.org/10.1051/0004-6361/201117329},
  volume       = {542},
  year         = {2012},
}

Chicago
Corbelli, E, S Bianchi, L Cortese, C Giovanardi, L Magrini, C Pappalardo, A Boselli, et al. 2012. “The Herschel Virgo Cluster Survey, X: The Relationship Between Cold Dust and Molecular Gas Content in Virgo Spirals.” Astronomy & Astrophysics 542.
APA
Corbelli, E., Bianchi, S., Cortese, L., Giovanardi, C., Magrini, L., Pappalardo, C., Boselli, A., et al. (2012). The Herschel Virgo Cluster survey, X: the relationship between cold dust and molecular gas content in Virgo spirals. ASTRONOMY & ASTROPHYSICS, 542.
Vancouver
1.
Corbelli E, Bianchi S, Cortese L, Giovanardi C, Magrini L, Pappalardo C, et al. The Herschel Virgo Cluster survey, X: the relationship between cold dust and molecular gas content in Virgo spirals. ASTRONOMY & ASTROPHYSICS. 2012;542.
MLA
Corbelli, E, S Bianchi, L Cortese, et al. “The Herschel Virgo Cluster Survey, X: The Relationship Between Cold Dust and Molecular Gas Content in Virgo Spirals.” ASTRONOMY & ASTROPHYSICS 542 (2012): n. pag. Print.