Far-infrared distributions in nearby spiral galaxies NGC 2841 and NGC 2976 observed with AKARI/Far-Infrared Surveyor (FIS)

被引：7

作者：

Kaneda, Hidehiro ^{[1
]}

Suzuki, Toyoaki ^{[1
]}

Onaka, Takashi ^{[2
]}

Doi, Yasuo ^{[3
]}

Kawada, Mitsunobu ^{[4
]}

Koo, Bon-Chul ^{[5
]}

Makiuti, Sin'itirou ^{[1
]}

Nakagawa, Takao ^{[1
]}

Okada, Yoko ^{[1
]}

Serjeant, Stephen ^{[6
]}

Shibai, Hiroshi ^{[4
]}

Shirahata, Mai ^{[1
]}

机构：

[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

[2] Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan

[3] Univ Tokyo, Dept Earth Sci & Astron, Tokyo 1538902, Japan

[4] Nagoya Univ, Chikusa Ku, Grad Sch Sci, Nagoya, Aichi 4648602, Japan

[5] Seoul Natl Univ, Dept Phys & Astron, Seoul 151742, South Korea

[6] Open Univ, Dept Phys, Milton Keynes MK7 6AA, Bucks, England

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2007年 / 59卷 / sp2期

基金：

英国科学技术设施理事会;

关键词：

galaxies; individual; (NGC; 2841; NGC; 2976); galaxies : ISM; galaxies : spiral; infrared : galaxies; ISM; dust; extinction;

D O I：

10.1093/pasj/59.sp2.S463

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Far-infrared (IR) images of the nearby Sb galaxy NGC 2841 and the Sc galaxy NGC 2976 at wavelengths of 65, 90, 140, and 160 mu m have been obtained with the Far-Infrared Surveyor (FIS) onboard AKARI. Both galaxies reveal similar morphologies of dust rings. They are, however, significantly different in the dust temperature: a cold (similar to 21 K) ring for NGC 2841 and a warm (similar to 30 K) ring for NGC 2976, which presumably reflects the difference in the origin of the ring structure for the different Hubble types of the galaxy. In addition to the dust-ring structure, a warm dust component was detected from the central region of NGC 2841, which may be attributed to heating by its Low-Ionization Nuclear Emission-line Region nucleus. As for NGC 2976, an extended dust component was observed along the minor axis, which shows a distribution somewhat asymmetrical to the galactic disk; this might be associated with the H I bridge in the M 81/M 82 group that NGC 2976 belongs to. By taking advantage of a wealth of the far-IR bands of the FIS, it has been demonstrated that the spectral energy distribution of NGC 2841 is spatially more variable than that of NGC 2976.

引用

页码：S463 / S471

页数：9

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