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Molecular depletion times and the CO-to-H 2 conversion factor in metal-poor galaxies
- Source :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, 2015, 583, pp.A114. ⟨10.1051/0004-6361/201526553⟩, Astronomy and Astrophysics-A&A, EDP Sciences, 2015, 583, pp.A114. ⟨10.1051/0004-6361/201526553⟩
- Publication Year :
- 2015
- Publisher :
- HAL CCSD, 2015.
-
Abstract
- Tracing molecular hydrogen content with carbon monoxide in low-metallicity galaxies has been exceedingly difficult. Here we present a new effort, with IRAM 30-m observations of 12CO(1-0) of a sample of 8 dwarf galaxies having oxygen abundances ranging from 12+logO/H=7.7 to 8.4. CO emission is detected in all galaxies, including the most metal-poor galaxy of our sample (0.1 Zsun); to our knowledge this is the largest number of 12CO(1-0) detections ever reported for galaxies with 12+logO/H<br />18 pages, 15 figures, accepted for publication in A&A
- Subjects :
- Physics
[PHYS]Physics [physics]
Metallicity
Conversion factor
Local Group
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
Astrophysics - Astrophysics of Galaxies
Galaxy
3. Good health
Baryon
chemistry.chemical_compound
chemistry
13. Climate action
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Low Mass
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
ComputingMilieux_MISCELLANEOUS
Dwarf galaxy
Carbon monoxide
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, 2015, 583, pp.A114. ⟨10.1051/0004-6361/201526553⟩, Astronomy and Astrophysics-A&A, EDP Sciences, 2015, 583, pp.A114. ⟨10.1051/0004-6361/201526553⟩
- Accession number :
- edsair.doi.dedup.....9bb2858ec794b0b48840ddc1018b7cd5