Temperature variations of cold dust in the triangulum galaxy M 33

Shinya Komugi; Tomoka Tosaki; Kotaro Kohno; Takashi Tsukagoshi; Kouichiro Nakanishi; Tsuyoshi Sawada; Ryohei Kawabe; Hajime Ezawa; Nario Kuno; Sachiko Onodera; Yoichi Tamura; Grant W. Wilson; Min S. Yun; Kimberly S. Scott; Thushara A. Perera; Jason E. Austermann; David H. Hughes; Itziar Aretxaga; Kunihiko Tanaka; Kazuyuki Muraoka; Rie Miura; Fumi Egusa

doi:10.1093/pasj/63.5.1139

Temperature variations of cold dust in the triangulum galaxy M 33

Shinya Komugi, Tomoka Tosaki, Kotaro Kohno, Takashi Tsukagoshi, Kouichiro Nakanishi, Tsuyoshi Sawada, Ryohei Kawabe, Hajime Ezawa, Nario Kuno, Sachiko Onodera, Yoichi Tamura, Grant W. Wilson, Min S. Yun, Kimberly S. Scott, Thushara A. Perera, Jason E. Austermann, David H. Hughes, Itziar Aretxaga, Kunihiko Tanaka, Kazuyuki MuraokaRie Miura, Fumi Egusa

Department of Physics

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

We present wide-field 1.1mm continuum imaging of the nearby spiral galaxy M 33, conducted with the AzTEC bolometer camera on ASTE.We show that the 1.1mm flux traces the distribution of dust with T ̃ 20K. Combined with far-infrared imaging at 160μm, we derived the dust temperature distribution out to a galactic radius of ̃7 kpc with a spatial resolution of ̃150 pc. Although the 1.1mm flux was observed predominantly near star-forming regions, we found a smooth radial temperature gradient declining from ̃20K to ̃13K consistent with recent results from the Herschel satellite. Further comparisons of individual regions show a strong correlation between the cold dust temperature and the K_S band brightness, but not with the ionizing flux. The observed results imply that the dominant heating source of cold dust at few hundred parsec scales is due to non-OB stars, even when associated with star-forming regions.

Original language	English
Pages (from-to)	1139-1150
Number of pages	12
Journal	Publications of the Astronomical Society of Japan
Volume	63
Issue number	5
DOIs	https://doi.org/10.1093/pasj/63.5.1139
Publication status	Published - 2011 Oct 25

Keywords

Galaxies: Dust
Galaxies: ISM
Galaxies: Individual (M 33)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Komugi, S., Tosaki, T., Kohno, K., Tsukagoshi, T., Nakanishi, K., Sawada, T., Kawabe, R., Ezawa, H., Kuno, N., Onodera, S., Tamura, Y., Wilson, G. W., Yun, M. S., Scott, K. S., Perera, T. A., Austermann, J. E., Hughes, D. H., Aretxaga, I., Tanaka, K., ... Egusa, F. (2011). Temperature variations of cold dust in the triangulum galaxy M 33. Publications of the Astronomical Society of Japan, 63(5), 1139-1150. https://doi.org/10.1093/pasj/63.5.1139

Temperature variations of cold dust in the triangulum galaxy M 33. / Komugi, Shinya; Tosaki, Tomoka; Kohno, Kotaro; Tsukagoshi, Takashi; Nakanishi, Kouichiro; Sawada, Tsuyoshi; Kawabe, Ryohei; Ezawa, Hajime; Kuno, Nario; Onodera, Sachiko; Tamura, Yoichi; Wilson, Grant W.; Yun, Min S.; Scott, Kimberly S.; Perera, Thushara A.; Austermann, Jason E.; Hughes, David H.; Aretxaga, Itziar; Tanaka, Kunihiko; Muraoka, Kazuyuki; Miura, Rie; Egusa, Fumi.

In: Publications of the Astronomical Society of Japan, Vol. 63, No. 5, 25.10.2011, p. 1139-1150.

Research output: Contribution to journal › Article › peer-review

Komugi, S, Tosaki, T, Kohno, K, Tsukagoshi, T, Nakanishi, K, Sawada, T, Kawabe, R, Ezawa, H, Kuno, N, Onodera, S, Tamura, Y, Wilson, GW, Yun, MS, Scott, KS, Perera, TA, Austermann, JE, Hughes, DH, Aretxaga, I, Tanaka, K, Muraoka, K, Miura, R & Egusa, F 2011, 'Temperature variations of cold dust in the triangulum galaxy M 33', Publications of the Astronomical Society of Japan, vol. 63, no. 5, pp. 1139-1150. https://doi.org/10.1093/pasj/63.5.1139

Komugi, Shinya ; Tosaki, Tomoka ; Kohno, Kotaro ; Tsukagoshi, Takashi ; Nakanishi, Kouichiro ; Sawada, Tsuyoshi ; Kawabe, Ryohei ; Ezawa, Hajime ; Kuno, Nario ; Onodera, Sachiko ; Tamura, Yoichi ; Wilson, Grant W. ; Yun, Min S. ; Scott, Kimberly S. ; Perera, Thushara A. ; Austermann, Jason E. ; Hughes, David H. ; Aretxaga, Itziar ; Tanaka, Kunihiko ; Muraoka, Kazuyuki ; Miura, Rie ; Egusa, Fumi. / Temperature variations of cold dust in the triangulum galaxy M 33. In: Publications of the Astronomical Society of Japan. 2011 ; Vol. 63, No. 5. pp. 1139-1150.

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abstract = "We present wide-field 1.1mm continuum imaging of the nearby spiral galaxy M 33, conducted with the AzTEC bolometer camera on ASTE.We show that the 1.1mm flux traces the distribution of dust with T{\~ } 20K. Combined with far-infrared imaging at 160μm, we derived the dust temperature distribution out to a galactic radius of{\~ }7 kpc with a spatial resolution of{\~ }150 pc. Although the 1.1mm flux was observed predominantly near star-forming regions, we found a smooth radial temperature gradient declining from{\~ }20K to{\~ }13K consistent with recent results from the Herschel satellite. Further comparisons of individual regions show a strong correlation between the cold dust temperature and the KS band brightness, but not with the ionizing flux. The observed results imply that the dominant heating source of cold dust at few hundred parsec scales is due to non-OB stars, even when associated with star-forming regions.",

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AU - Komugi, Shinya

AU - Tosaki, Tomoka

AU - Kohno, Kotaro

AU - Tsukagoshi, Takashi

AU - Nakanishi, Kouichiro

AU - Sawada, Tsuyoshi

AU - Kawabe, Ryohei

AU - Ezawa, Hajime

AU - Kuno, Nario

AU - Onodera, Sachiko

AU - Tamura, Yoichi

AU - Wilson, Grant W.

AU - Yun, Min S.

AU - Scott, Kimberly S.

AU - Perera, Thushara A.

AU - Austermann, Jason E.

AU - Hughes, David H.

AU - Aretxaga, Itziar

AU - Tanaka, Kunihiko

AU - Muraoka, Kazuyuki

AU - Miura, Rie

AU - Egusa, Fumi

PY - 2011/10/25

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N2 - We present wide-field 1.1mm continuum imaging of the nearby spiral galaxy M 33, conducted with the AzTEC bolometer camera on ASTE.We show that the 1.1mm flux traces the distribution of dust with T ̃ 20K. Combined with far-infrared imaging at 160μm, we derived the dust temperature distribution out to a galactic radius of ̃7 kpc with a spatial resolution of ̃150 pc. Although the 1.1mm flux was observed predominantly near star-forming regions, we found a smooth radial temperature gradient declining from ̃20K to ̃13K consistent with recent results from the Herschel satellite. Further comparisons of individual regions show a strong correlation between the cold dust temperature and the KS band brightness, but not with the ionizing flux. The observed results imply that the dominant heating source of cold dust at few hundred parsec scales is due to non-OB stars, even when associated with star-forming regions.

AB - We present wide-field 1.1mm continuum imaging of the nearby spiral galaxy M 33, conducted with the AzTEC bolometer camera on ASTE.We show that the 1.1mm flux traces the distribution of dust with T ̃ 20K. Combined with far-infrared imaging at 160μm, we derived the dust temperature distribution out to a galactic radius of ̃7 kpc with a spatial resolution of ̃150 pc. Although the 1.1mm flux was observed predominantly near star-forming regions, we found a smooth radial temperature gradient declining from ̃20K to ̃13K consistent with recent results from the Herschel satellite. Further comparisons of individual regions show a strong correlation between the cold dust temperature and the KS band brightness, but not with the ionizing flux. The observed results imply that the dominant heating source of cold dust at few hundred parsec scales is due to non-OB stars, even when associated with star-forming regions.

KW - Galaxies: Dust

KW - Galaxies: ISM

KW - Galaxies: Individual (M 33)

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