HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >

Properties of giant molecular clouds in the strongly barred galaxy NGC 1300

Files in This Item:
Mon. Not. Roy. Astron. Soc.493-4_5045-5061.pdf5.94 MBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Properties of giant molecular clouds in the strongly barred galaxy NGC 1300
Authors: Maeda, Fumiya Browse this author
Ohta, Kouji Browse this author
Fujimoto, Yusuke Browse this author
Habe, Asao Browse this author →KAKEN DB
Keywords: ISM: clouds
galaxies: individual: NGC1300
galaxies: star formation
Issue Date: Apr-2020
Publisher: Oxford University Press
Journal Title: Monthly notices of the royal astronomical society
Volume: 493
Issue: 4
Start Page: 5045
End Page: 5061
Publisher DOI: 10.1093/mnras/staa556
Abstract: Star formation activity depends on galactic-scale environments. To understand the variations in star formation activity, comparing the properties of giant molecular clouds (GMCs) among environments with different star formation efficiency (SFE) is necessary. We thus focus on a strongly barred galaxy to investigate the impact of the galactic environment on the GMC properties, because the SFE is clearly lower in bar regions than in arm regions. In this paper, we present the (CO)-C-12(1 - 0) observations towards the western bar, arm, and bar-end regions of the strongly barred galaxy NGC 1300 with ALMA 12-m array at a high angular resolution of similar to 40 pc. We detected GMCs associated with the dark lanes not only in the arm and barend regions but also in the bar region, where massive star formation is not seen. Using the CPROPS algorithm, we identified and characterized 233 GMCs across the observed regions. Based on the Kolmogorov-Smirnov test, we find that there is virtually no significant variations in GMC properties (e.g. radius, velocity dispersion, molecular gas mass, and virial parameter) among the bar, arm, and bar-end region. These results suggest that systematic differences in the physical properties of the GMCs are not the cause for SFE differences with environments, and that there should be other mechanisms which control the SFE of the GMCs such as fast cloud-cloud collisions in NGC 1300.
Rights: This article has been accepted for publication in Monthly notices of the royal astronomical society ©:2020 Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 羽部 朝男

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University