Advanced search
1 file | 4.75 MB Add to list

The Herschel exploitation of local galaxy Andromeda (HELGA), IV : dust scaling relations at sub-kpc resolution

Author
Organization
Abstract
Context. Dust and stars play a complex game of interactions in the interstellar medium and around young stars. The imprints of these processes are visible in scaling relations between stellar characteristics, star formation parameters, and dust properties. Aims. In the present work, we aim to examine dust scaling relations on a sub-kpc resolution in the Andromeda galaxy (M 31). The goal is to investigate the properties of M 31 on both a global and local scale and compare them to other galaxies of the local universe. Methods. New Herschel observations are combined with available data from GALEX, SDSS, WISE, and Spitzer to construct a dataset covering UV to submm wavelengths. All images were brought to the beam size and pixel grid of the SPIRE 500 mu m frame. This divides M 31 in 22437 pixels of 36 arcseconds in size on the sky, corresponding to physical regions of 137 x 608 pc in the galaxy's disk. A panchromatic spectral energy distribution was modelled for each pixel and maps of the physical quantities were constructed. Several scaling relations were investigated, focussing on the interactions of dust with starlight. Results. We find, on a sub-kpc scale, strong correlations between M-dust/M-star and NUV-r, and between M-dust/M-star and mu(star), (the stellar mass surface density). Striking similarities with corresponding relations based on integrated galaxies are found. We decompose M 31 in four macro-regions based on their far-infrared morphology; the bulge, inner disk, star forming ring, and the outer disk region. In the scaling relations, all regions closely follow the galaxy-scale average trends and behave like galaxies of different morphological types. The specific star formation characteristics we derive for these macro-regions give strong hints of an inside-out formation of the bulge-disk geometry, as well as an internal downsizing process. Within each macro-region, however, a great diversity in individual micro-regions is found, regardless of the properties of the macro-regions. Furthermore, we confirm that dust in the bulge of M 31 is heated only by the old stellar populations. Conclusions. In general, the local dust scaling relations indicate that the dust content in M 31 is maintained by a subtle interplay of past and present star formation. The similarity with galaxy-based relations strongly suggests that they are in situ correlations, with underlying processes that must be local in nature.
Keywords
galaxies: ISM, galaxies: individual: M 31, infrared: ISM, galaxies: fundamental parameters, dust, extinction, methods: observational, TO-GAS RATIO, MULTIBAND IMAGING PHOTOMETER, SPECTRAL ENERGY-DISTRIBUTION, SPITZER-SPACE-TELESCOPE, VIRGO CLUSTER GALAXIES, NEARBY SPIRAL GALAXIES, STAR-FORMING GALAXIES, DIGITAL SKY SURVEY, H II REGIONS, INFRARED-EMISSION

Downloads

  • Viaene et al. 2014.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 4.75 MB

Citation

Please use this url to cite or link to this publication:

MLA
Viaene, Sébastien et al. “The Herschel Exploitation of Local Galaxy Andromeda (HELGA), IV : Dust Scaling Relations at Sub-kpc Resolution.” ASTRONOMY & ASTROPHYSICS 567 (2014): n. pag. Print.
APA
Viaene, S., Fritz, J., Baes, M., Bendo, G., Blommaert, J., Boquien, M., Boselli, A., et al. (2014). The Herschel exploitation of local galaxy Andromeda (HELGA), IV : dust scaling relations at sub-kpc resolution. ASTRONOMY & ASTROPHYSICS, 567.
Chicago author-date
Viaene, Sébastien, Jacopo Fritz, Maarten Baes, GJ Bendo, JADL Blommaert, M Boquien, A Boselli, et al. 2014. “The Herschel Exploitation of Local Galaxy Andromeda (HELGA), IV : Dust Scaling Relations at Sub-kpc Resolution.” Astronomy & Astrophysics 567.
Chicago author-date (all authors)
Viaene, Sébastien, Jacopo Fritz, Maarten Baes, GJ Bendo, JADL Blommaert, M Boquien, A Boselli, L Ciesla, L Cortese, Ilse De Looze, WK Gear, Gianfranco Gentile, Thomas Hughes, T Jarrett, OŁ Karczewski, MWL Smith, L Spinoglio, A Tamm, E Tempel, D Thilker, and Joris Verstappen. 2014. “The Herschel Exploitation of Local Galaxy Andromeda (HELGA), IV : Dust Scaling Relations at Sub-kpc Resolution.” Astronomy & Astrophysics 567.
Vancouver
1.
Viaene S, Fritz J, Baes M, Bendo G, Blommaert J, Boquien M, et al. The Herschel exploitation of local galaxy Andromeda (HELGA), IV : dust scaling relations at sub-kpc resolution. ASTRONOMY & ASTROPHYSICS. 2014;567.
IEEE
[1]
S. Viaene et al., “The Herschel exploitation of local galaxy Andromeda (HELGA), IV : dust scaling relations at sub-kpc resolution,” ASTRONOMY & ASTROPHYSICS, vol. 567, 2014.
@article{5921193,
  abstract     = {{Context. Dust and stars play a complex game of interactions in the interstellar medium and around young stars. The imprints of these processes are visible in scaling relations between stellar characteristics, star formation parameters, and dust properties. 
Aims. In the present work, we aim to examine dust scaling relations on a sub-kpc resolution in the Andromeda galaxy (M 31). The goal is to investigate the properties of M 31 on both a global and local scale and compare them to other galaxies of the local universe. 
Methods. New Herschel observations are combined with available data from GALEX, SDSS, WISE, and Spitzer to construct a dataset covering UV to submm wavelengths. All images were brought to the beam size and pixel grid of the SPIRE 500 mu m frame. This divides M 31 in 22437 pixels of 36 arcseconds in size on the sky, corresponding to physical regions of 137 x 608 pc in the galaxy's disk. A panchromatic spectral energy distribution was modelled for each pixel and maps of the physical quantities were constructed. Several scaling relations were investigated, focussing on the interactions of dust with starlight. 
Results. We find, on a sub-kpc scale, strong correlations between M-dust/M-star and NUV-r, and between M-dust/M-star and mu(star), (the stellar mass surface density). Striking similarities with corresponding relations based on integrated galaxies are found. We decompose M 31 in four macro-regions based on their far-infrared morphology; the bulge, inner disk, star forming ring, and the outer disk region. In the scaling relations, all regions closely follow the galaxy-scale average trends and behave like galaxies of different morphological types. The specific star formation characteristics we derive for these macro-regions give strong hints of an inside-out formation of the bulge-disk geometry, as well as an internal downsizing process. Within each macro-region, however, a great diversity in individual micro-regions is found, regardless of the properties of the macro-regions. Furthermore, we confirm that dust in the bulge of M 31 is heated only by the old stellar populations. 
Conclusions. In general, the local dust scaling relations indicate that the dust content in M 31 is maintained by a subtle interplay of past and present star formation. The similarity with galaxy-based relations strongly suggests that they are in situ correlations, with underlying processes that must be local in nature.}},
  articleno    = {{A71}},
  author       = {{Viaene, Sébastien and Fritz, Jacopo and Baes, Maarten and Bendo, GJ and Blommaert, JADL and Boquien, M and Boselli, A and Ciesla, L and Cortese, L and De Looze, Ilse and Gear, WK and Gentile, Gianfranco and Hughes, Thomas and Jarrett, T and Karczewski, OŁ and Smith, MWL and Spinoglio, L and Tamm, A and Tempel, E and Thilker, D and Verstappen, Joris}},
  issn         = {{0004-6361}},
  journal      = {{ASTRONOMY & ASTROPHYSICS}},
  keywords     = {{galaxies: ISM,galaxies: individual: M 31,infrared: ISM,galaxies: fundamental parameters,dust,extinction,methods: observational,TO-GAS RATIO,MULTIBAND IMAGING PHOTOMETER,SPECTRAL ENERGY-DISTRIBUTION,SPITZER-SPACE-TELESCOPE,VIRGO CLUSTER GALAXIES,NEARBY SPIRAL GALAXIES,STAR-FORMING GALAXIES,DIGITAL SKY SURVEY,H II REGIONS,INFRARED-EMISSION}},
  language     = {{eng}},
  pages        = {{22}},
  title        = {{The Herschel exploitation of local galaxy Andromeda (HELGA), IV : dust scaling relations at sub-kpc resolution}},
  url          = {{http://dx.doi.org/10.1051/0004-6361/201423534}},
  volume       = {{567}},
  year         = {{2014}},
}

Altmetric
View in Altmetric
Web of Science
Times cited: