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The interstellar medium in Andromeda's dwarf spheroidal galaxies, II : multiphase gas content and ISM conditions

Ilse De Looze UGent, Maarten Baes UGent, Diane Cormier, Hiroyuki Kaneko, Nario Kuno, Lisa Young, George J Bendo, Médéric Boquien, Jacopo Fritz, Gianfranco Gentile, et al. (2017) MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 465(3). p.3741-3758
abstract
We make an inventory of the interstellar medium material in three low-metallicity dwarf spheroidal galaxies of the Local Group (NGC 147, NGC 185 and NGC 205). Ancillary HI, CO, Spitzer Infrared Spectrograph spectra, Ha and X-ray observations are combined to trace the atomic, cold and warm molecular, ionized and hot gas phases. We present new Nobeyama CO(1-0) observations and Herschel SPIRE FTS [CI] observations of NGC 205 to revise its molecular gas content. We derive total gas masses of M-g = 1.9-5.5 x 10(5) M-circle dot for NGC 185 and Mg = 8.6-25.0 x 10(5) M-circle dot for NGC 205. Non-detections combine to an upper limit on the gas mass of Mg = 0.3-2.2 x 10(5) M-circle dot for NGC 147. The observed gas reservoirs are significantly lower compared to the expected gas masses based on a simple closed-box model that accounts for the gas mass returned by planetary nebulae and supernovae. The gas-to-dust mass ratios GDR similar to 37-107 and 48-139 are also considerably lower compared to the expected GDR similar to 370 and 520 for the low metal abundances in NGC 185 (0.36 Z(circle dot)) and NGC 205 (0.25 Z(circle dot)), respectively. To simultaneously account for the gas deficiency and low gas-todust ratios, we require an efficient removal of a large gas fraction and a longer dust survival time (similar to 1.6 Gyr). We believe that efficient galactic winds (combined with heating of gas to sufficiently high temperatures in order for it to escape from the galaxy) and/or environmental interactions with neighbouring galaxies are responsible for the gas removal from NGC 147, NGC 185 and NGC 205.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
ISM: evolution, galaxies: dwarf, galaxies: individual: NGC 147, NGC 185, NGC 205, Local Group, infrared: ISM, FAR-INFRARED SPECTROSCOPY, LOCAL GROUP GALAXIES, FOURIER-TRANSFORM SPECTROMETER, STAR-FORMATION HISTORY, NGC 185, MOLECULAR GAS, ATOMIC CARBON, PLANETARY-NEBULAE, VIRGO CLUSTER, C-II
journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Mon. Not. Roy. Astron. Soc.
volume
465
issue
3
pages
3741 - 3758
Web of Science type
Article
Web of Science id
000395165900083
ISSN
0035-8711
1365-2966
DOI
10.1093/mnras/stw3001
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
8503151
handle
http://hdl.handle.net/1854/LU-8503151
date created
2017-01-20 12:44:23
date last changed
2018-06-22 09:02:34
@article{8503151,
  abstract     = {We make an inventory of the interstellar medium material in three low-metallicity dwarf spheroidal galaxies of the Local Group (NGC 147, NGC 185 and NGC 205). Ancillary HI, CO, Spitzer Infrared Spectrograph spectra, Ha and X-ray observations are combined to trace the atomic, cold and warm molecular, ionized and hot gas phases. We present new Nobeyama CO(1-0) observations and Herschel SPIRE FTS [CI] observations of NGC 205 to revise its molecular gas content. We derive total gas masses of M-g = 1.9-5.5 x 10(5) M-circle dot for NGC 185 and Mg = 8.6-25.0 x 10(5) M-circle dot for NGC 205. Non-detections combine to an upper limit on the gas mass of Mg = 0.3-2.2 x 10(5) M-circle dot for NGC 147. The observed gas reservoirs are significantly lower compared to the expected gas masses based on a simple closed-box model that accounts for the gas mass returned by planetary nebulae and supernovae. The gas-to-dust mass ratios GDR similar to 37-107 and 48-139 are also considerably lower compared to the expected GDR similar to 370 and 520 for the low metal abundances in NGC 185 (0.36 Z(circle dot)) and NGC 205 (0.25 Z(circle dot)), respectively. To simultaneously account for the gas deficiency and low gas-todust ratios, we require an efficient removal of a large gas fraction and a longer dust survival time (similar to 1.6 Gyr). We believe that efficient galactic winds (combined with heating of gas to sufficiently high temperatures in order for it to escape from the galaxy) and/or environmental interactions with neighbouring galaxies are responsible for the gas removal from NGC 147, NGC 185 and NGC 205.},
  author       = {De Looze, Ilse and Baes, Maarten and Cormier, Diane and Kaneko, Hiroyuki and Kuno, Nario and Young, Lisa and Bendo, George J and Boquien, M{\'e}d{\'e}ric and Fritz, Jacopo and Gentile, Gianfranco and Kennicutt, Robert C and Madden, Suzanne C and Smith, Matthew WL and Wilson, Christine D},
  issn         = {0035-8711},
  journal      = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
  keyword      = {ISM: evolution,galaxies: dwarf,galaxies: individual: NGC 147,NGC 185,NGC 205,Local Group,infrared: ISM,FAR-INFRARED SPECTROSCOPY,LOCAL GROUP GALAXIES,FOURIER-TRANSFORM SPECTROMETER,STAR-FORMATION HISTORY,NGC 185,MOLECULAR GAS,ATOMIC CARBON,PLANETARY-NEBULAE,VIRGO CLUSTER,C-II},
  language     = {eng},
  number       = {3},
  pages        = {3741--3758},
  title        = {The interstellar medium in Andromeda's dwarf spheroidal galaxies, II : multiphase gas content and ISM conditions},
  url          = {http://dx.doi.org/10.1093/mnras/stw3001},
  volume       = {465},
  year         = {2017},
}

Chicago
De Looze, Ilse, Maarten Baes, Diane Cormier, Hiroyuki Kaneko, Nario Kuno, Lisa Young, George J Bendo, et al. 2017. “The Interstellar Medium in Andromeda’s Dwarf Spheroidal Galaxies, II : Multiphase Gas Content and ISM Conditions.” Monthly Notices of the Royal Astronomical Society 465 (3): 3741–3758.
APA
De Looze, Ilse, Baes, M., Cormier, D., Kaneko, H., Kuno, N., Young, L., Bendo, G. J., et al. (2017). The interstellar medium in Andromeda’s dwarf spheroidal galaxies, II : multiphase gas content and ISM conditions. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 465(3), 3741–3758.
Vancouver
1.
De Looze I, Baes M, Cormier D, Kaneko H, Kuno N, Young L, et al. The interstellar medium in Andromeda’s dwarf spheroidal galaxies, II : multiphase gas content and ISM conditions. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 2017;465(3):3741–58.
MLA
De Looze, Ilse, Maarten Baes, Diane Cormier, et al. “The Interstellar Medium in Andromeda’s Dwarf Spheroidal Galaxies, II : Multiphase Gas Content and ISM Conditions.” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 465.3 (2017): 3741–3758. Print.