Dust and PAHs in X-ray plasma of elliptical galaxies

Hidehiro Kaneda, Takashi Onaka, Toyoaki Suzuki, Tatsuya Mori, Mitsuyoshi Yamagishi, Toru Kondo, Akiko Yasuda

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Many elliptical galaxies possess an appreciable amount of X-ray-emitting hot plasma, providing a harsh interstellar environment for the survival of dust grains and polycyclic aromatic hydrocarbons (PAHs). Despite such a hostile environment, it has been found that a significant fraction of X-ray elliptical galaxies contain a considerable amount of dust, which cannot be explained solely from replenishment by old stars. Some of them even show the presence of PAHs. We present the results of AKARI and Spitzer observations of dust and PAHs in X-ray elliptical galaxies. We investigate their possible origins and discuss the implications of their presence for the evolution of elliptical galaxies.

Original languageEnglish
Title of host publicationThe Spectral Energy Distribution of Galaxies
EditorsRichard J. Tuffs, Cristina C. Popescu
Number of pages5
Publication statusPublished - 2011 Sep
Externally publishedYes

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221


  • ISM: dust
  • cD-galaxies: ISM
  • extinction-infrared: galaxies-galaxies: elliptical and lenticular

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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