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The interstellar medium in Andromeda's dwarf spheroidal galaxies, I : content and origin of the interstellar dust

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Abstract
Dwarf spheroidal galaxies are among the most numerous galaxy population in the Universe, but their main formation and evolution channels are still not well understood. The three dwarf spheroidal satellites (NGC 147, NGC 185, and NGC 205) of the Andromeda galaxy are characterized by very different interstellar medium properties, which might suggest them being at different galaxy evolutionary stages. While the dust content of NGC 205 has been studied in detail in an earlier work, we present new Herschel dust continuum observations of NGC 147 and NGC 185. The non-detection of NGC 147 in Herschel SPIRE maps puts a strong constraint on its dust mass (a parts per thousand currency sign128 M-aS (TM)). For NGC 185, we derive a total dust mass M-d = 5.1 +/- 1.0 x 10(3) M-aS (TM), which is a factor of similar to 2-3 higher than that derived from ISO and Spitzer observations and confirms the need for longer wavelength observations to trace more massive cold dust reservoirs. We, furthermore, estimate the dust production by asymptotic giant branch (AGB) stars and supernovae (SNe). For NGC 147, the upper limit on the dust mass is consistent with expectations of the material injected by the evolved stellar population. In NGC 185 and NGC 205, the observed dust content is one order of magnitude higher compared to the estimated dust production by AGBs and SNe. Efficient grain growth, and potentially longer dust survival times (3-6 Gyr) are required to account for their current dust content. Our study confirms the importance of grain growth in the gas phase to account for the current dust reservoir in galaxies.
Keywords
galaxies: individual: NGC 147, galaxies: dwarf, galaxies: individual: NGC 185, galaxies: individual: NGC 205, Local Group, infrared: ISM, HERSCHEL REFERENCE SURVEY, LARGE-MAGELLANIC-CLOUD, VIRGO CLUSTER SURVEY, STAR-FORMING GALAXIES, LOCAL GROUP GALAXIES, AROMATIC-HYDROCARBON EMISSION, SUBMILLIMETER EXCESS EMISSION, MULTIBAND IMAGING PHOTOMETER, SPECTRAL ENERGY-DISTRIBUTION, LOW-METALLICITY ENVIRONMENTS

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Chicago
De Looze, Ilse, Maarten Baes, George J Bendo, Jacopo Fritz, Médéric Boquien, Diane Cormier, Gianfranco Gentile, et al. 2016. “The Interstellar Medium in Andromeda’s Dwarf Spheroidal Galaxies, I : Content and Origin of the Interstellar Dust.” Monthly Notices of the Royal Astronomical Society 459 (4): 3900–3916.
APA
De Looze, I., Baes, M., Bendo, G. J., Fritz, J., Boquien, M., Cormier, D., Gentile, G., et al. (2016). The interstellar medium in Andromeda’s dwarf spheroidal galaxies, I : content and origin of the interstellar dust. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 459(4), 3900–3916.
Vancouver
1.
De Looze I, Baes M, Bendo GJ, Fritz J, Boquien M, Cormier D, et al. The interstellar medium in Andromeda’s dwarf spheroidal galaxies, I : content and origin of the interstellar dust. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2016;459(4):3900–16.
MLA
De Looze, Ilse et al. “The Interstellar Medium in Andromeda’s Dwarf Spheroidal Galaxies, I : Content and Origin of the Interstellar Dust.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 459.4 (2016): 3900–3916. Print.
@article{8096878,
  abstract     = {Dwarf spheroidal galaxies are among the most numerous galaxy population in the Universe, but their main formation and evolution channels are still not well understood. The three dwarf spheroidal satellites (NGC 147, NGC 185, and NGC 205) of the Andromeda galaxy are characterized by very different interstellar medium properties, which might suggest them being at different galaxy evolutionary stages. While the dust content of NGC 205 has been studied in detail in an earlier work, we present new Herschel dust continuum observations of NGC 147 and NGC 185. The non-detection of NGC 147 in Herschel SPIRE maps puts a strong constraint on its dust mass (a parts per thousand currency sign128 M-aS (TM)). For NGC 185, we derive a total dust mass M-d = 5.1 +/- 1.0 x 10(3) M-aS (TM), which is a factor of similar to 2-3 higher than that derived from ISO and Spitzer observations and confirms the need for longer wavelength observations to trace more massive cold dust reservoirs. We, furthermore, estimate the dust production by asymptotic giant branch (AGB) stars and supernovae (SNe). For NGC 147, the upper limit on the dust mass is consistent with expectations of the material injected by the evolved stellar population. In NGC 185 and NGC 205, the observed dust content is one order of magnitude higher compared to the estimated dust production by AGBs and SNe. Efficient grain growth, and potentially longer dust survival times (3-6 Gyr) are required to account for their current dust content. Our study confirms the importance of grain growth in the gas phase to account for the current dust reservoir in galaxies.},
  author       = {De Looze, Ilse and Baes, Maarten and Bendo, George J and Fritz, Jacopo and Boquien, Médéric and Cormier, Diane and Gentile, Gianfranco and Kennicutt, Robert C and Madden, Suzanne C and Smith, Mathhew WL and Young, Lisa},
  issn         = {0035-8711},
  journal      = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
  keywords     = {galaxies: individual: NGC 147,galaxies: dwarf,galaxies: individual: NGC 185,galaxies: individual: NGC 205,Local Group,infrared: ISM,HERSCHEL REFERENCE SURVEY,LARGE-MAGELLANIC-CLOUD,VIRGO CLUSTER SURVEY,STAR-FORMING GALAXIES,LOCAL GROUP GALAXIES,AROMATIC-HYDROCARBON EMISSION,SUBMILLIMETER EXCESS EMISSION,MULTIBAND IMAGING PHOTOMETER,SPECTRAL ENERGY-DISTRIBUTION,LOW-METALLICITY ENVIRONMENTS},
  language     = {eng},
  number       = {4},
  pages        = {3900--3916},
  title        = {The interstellar medium in Andromeda's dwarf spheroidal galaxies, I : content and origin of the interstellar dust},
  url          = {http://dx.doi.org/10.1093/mnras/stw868},
  volume       = {459},
  year         = {2016},
}

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