Exploring the evolution of giant molecular clouds in one of the nearest spiral galaxies M33
Konishi A, Muraoka K, Tokuda K, Fujita S, Yamada RI, Demachi F, Tachihara K, Fukui Y, Kobayashi MI, Tsuge K, Kawamura A, Onishi T (2021)
Publication Language: English
Publication Type: Conference contribution
Publication year: 2021
Journal
Publisher: Cambridge University Press
Series: Proceedings of the International Astronomical Union
Book Volume: 17
Pages Range: 98-104
Conference Proceedings Title: Resolving the Rise and Fall of Star Formation in Galaxies
Event location: Busan
DOI: 10.1017/S1743921322004380
Abstract
The evolution of giant molecular clouds (GMCs), which are the main sites of star formation, is essential for unraveling how stars form and how galaxies evolve. We analyzed the M33 CO(J = 2–1) data with spatial resolution of 39 pc obtained by ALMA-ACA 7 m array combined with IRAM 30 m. We identified 736 GMCs and classified them into three types; Type I: associated with no H ii regions, Type II: associated with H ii regions with the Hα luminosity L(Hα) < 1037.5erg s−1, Type III: associated with H ii regions with L(Hα) > 1037.5erg s−1. We found that mass, size, and velocity dispersion of GMCs slightly increase in the order of Type I, II, and III GMCs. Type III GMCs mainly exist in the spiral arm, while many of Type I and Type II GMCs are distributed in the inter-arm. Assuming that the star formation proceeds steadily, we roughly estimated the total GMC lifetime of 30 Myr.
Authors with CRIS profile
Involved external institutions
Osaka Metropolitan University (OMU)
Japan (JP)
Kyushu University / 九州大学
Japan (JP)
University of Tokyo
Japan (JP)
Nagoya University / 名古屋大学
Japan (JP)
National Astronomical Observatory of Japan / 国立天文台(NAOJ)
Japan (JP)
Japan (JP)
Kyushu University / 九州大学
Japan (JP)
University of Tokyo
Japan (JP)
Nagoya University / 名古屋大学
Japan (JP)
National Astronomical Observatory of Japan / 国立天文台(NAOJ)
Japan (JP)
How to cite
APA:
Konishi, A., Muraoka, K., Tokuda, K., Fujita, S., Yamada, R.I., Demachi, F.,... Onishi, T. (2021). Exploring the evolution of giant molecular clouds in one of the nearest spiral galaxies M33. In Resolving the Rise and Fall of Star Formation in Galaxies (pp. 98-104). Busan, KR: Cambridge University Press.
MLA:
Konishi, Ayu, et al. "Exploring the evolution of giant molecular clouds in one of the nearest spiral galaxies M33." Proceedings of the IAU Symposium 373: Resolving the Rise and Fall of Star Formation in Galaxies, Busan Cambridge University Press, 2021. 98-104.
BibTeX: Download