AKARI observations of interstellar dust grains in our Galaxy and nearby galaxies

H. Kaneda, D. Ishihara, K. Kobata, Toru Kondo, S. Oyabu, R. Yamada, M. Yamagishi, T. Onaka, T. Suzuki

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The infrared (IR) emission from interstellar dust grains is a powerful tool to trace star-formation activities in galaxies. Beyond such star-formation tracers, spectral information on polycyclic aromatic hydrocarbons (PAHs) and large grains, or even their photometric intensity ratios, has deep physical implications for understanding the properties of the interstellar medium. With the AKARI satellite launched in 2006, we have performed a systematic study of interstellar dust grains in various environments of galaxies including our Galaxy. Because of its unique capabilities, such as mid-/far-IR all-sky surveys and near-/far-IR spectroscopy, AKARI has provided new knowledge on the processing of dust, particularly carbonaceous grains including PAHs, in the interstellar space. For example, the near-IR spectroscopy has revealed structural changes of hydrocarbon grains in harsh environments of galaxies. In this paper, we focus on the properties of the PAH emission obtained by the AKARI mid-IR all-sky survey and near-IR spectroscopy.

Original languageEnglish
Pages (from-to)6-11
Number of pages6
JournalPlanetary and Space Science
Volume100
DOIs
Publication statusPublished - 2014 Oct 1
Externally publishedYes

Keywords

  • AKARI
  • Galaxy
  • Intersteller dust
  • PAH

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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