Dust and gas in diffuse interstellar medium of the large magellanic cloud

N. Naslim, F. Kemper, Y. Yang, S. Hony, J. P. Bernard, K. D. Gordon, W. Reach, C. Bot, O. Morata, H. Hirashita, J. Seok, S. C. Madden, A. Hughes, R. Indebetouw

Research output: Contribution to journalConference articlepeer-review


We investigate gas and dust physical properties and chemistry of diffuse interstellar medium in the Large Magellanic Cloud (LMC). Photometric and spectroscopic data of total twelve diffuse regions were obtained as part of the LMC legacy programs, Surveying the agents of Galaxy Evolution and Herschel Inventory of The Agents of Galaxy Evolution. The Spitzer infrared spectra of these regions reveal low J rotational transition lines of H2 and aromatic band emissions due to PAHs. By fitting the rotational diagram of H2 we determine temperature and column density of warm molecular gas. Dust temperature and mass are measured by fitting the far-infrared spectral energy distributions obtained with the Herschel photometric images. In addition to Spitzer and Herschel data, we use HI map for atomic gas mass, and CO map to trace cold molecular hydrogen. Our goal is to constrain the state of ISM by determining mass, temperature and gas-to-dust ratio. From preliminary analyses, we present gas and dust physical properties and gas-to-dust ratios of two diffuse regions. We derive gas-to-dust ratios of 240 in these regions assuming a CO-to-H2 conversion factor 2 × 1020 cm-2 K-1 km-1 s.

Original languageEnglish
JournalProceedings of Science
Publication statusPublished - 2013
Externally publishedYes
EventLife Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments, LCDU 2013 - Taipei, Taiwan, Province of China
Duration: Nov 18 2013Nov 22 2013

ASJC Scopus subject areas

  • General


Dive into the research topics of 'Dust and gas in diffuse interstellar medium of the large magellanic cloud'. Together they form a unique fingerprint.

Cite this