干旱区生态环境知识资源中心(Arid): Stellar structures, molecular gas, and star formation across the PHANGS sample of nearby galaxies

Arid

DOI	10.1051/0004-6361/202140695
	Stellar structures, molecular gas, and star formation across the PHANGS sample of nearby galaxies
	Querejeta, M.; Schinnerer, E.; Meidt, S.; Sun, J.; Leroy, A. K.; Emsellem, E.; Klessen, R. S.; Munoz-Mateos, J. C.; Salo, H.; Laurikainen, E.; Beslic, I; Blanc, G. A.; Chevance, M.; Dale, D. A.; Eibensteiner, C.; Faesi, C.; Garcia-Rodriguez, A.; Glover, S. C. O.; Grasha, K.; Henshaw, J.; Herrera, C.; Hughes, A.; Kreckel, K.; Kruijssen, J. M. D.; Liu, D.; Murphy, E. J.; Pan, H-A; Pety, J.; Razza, A.; Rosolowsky, E.; Saito, T.; Schruba, A.; Usero, A.; Watkins, E. J.; Williams, T. G.
通讯作者	Querejeta, M (corresponding author), Observ Astron Nacl IGN, C Alfonso XII 3, Madrid 28014, Spain.
来源期刊	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
EISSN	1432-0746
出版年	2021
卷号	656
英文摘要	We identify stellar structures in the PHANGS sample of 74 nearby galaxies and construct morphological masks of sub-galactic environments based on Spitzer 3.6 mu m images. At the simplest level, we distinguish five environments: centres, bars, spiral arms, interarm regions, and discs without strong spirals. Slightly more sophisticated masks include rings and lenses, which are publicly released but not explicitly used in this paper. We examine trends with environment in the molecular gas content, star formation rate, and depletion time using PHANGS-ALMA CO(2-1) intensity maps and tracers of star formation. The interarm regions and discs without strong spirals clearly dominate in area, whereas molecular gas and star formation are quite evenly distributed among the five basic environments. We reproduce the molecular Kennicutt-Schmidt relation with a slope compatible with unity within the uncertainties and without significant slope differences among environments. In contrast to what has been suggested by early studies, we find that bars are not always deserts devoid of gas and star formation, but instead they show large diversity. Similarly, spiral arms do not account for most of the gas and star formation in disc galaxies, and they do not have shorter depletion times than the interarm regions. Spiral arms accumulate gas and star formation, without systematically boosting the star formation efficiency. Centres harbour remarkably high surface densities and on average shorter depletion times than other environments. Centres of barred galaxies show higher surface densities and wider distributions compared to the outer disc; yet, depletion times are similar to unbarred galaxies, suggesting highly intermittent periods of star formation when bars episodically drive gas inflow, without enhancing the central star formation efficiency permanently. In conclusion, we provide quantitative evidence that stellar structures in galaxies strongly affect the organisation of molecular gas and star formation, but their impact on star formation efficiency is more subtle.
英文关键词	galaxies: structure galaxies: ISM galaxies: star formation
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000730544500004
WOS关键词	EDGE-CALIFA SURVEY ; 33 GHZ OBSERVATIONS ; 100 PC SCALES ; SPIRAL ARMS ; FORMATION EFFICIENCY ; BARRED GALAXIES ; DEPLETION TIME ; SPITZER SURVEY ; FORMATION LAW ; MORPHOLOGICAL CLASSIFICATIONS
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374131
作者单位	[Querejeta, M.; Garcia-Rodriguez, A.; Usero, A.] Observ Astron Nacl IGN, C Alfonso XII 3, Madrid 28014, Spain; [Schinnerer, E.; Munoz-Mateos, J. C.; Henshaw, J.; Liu, D.; Pan, H-A; Saito, T.; Williams, T. G.] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany; [Meidt, S.] Univ Ghent, Sterrenkundig Observ, Krijgslaan 281 S9, B-9000 Ghent, Belgium; [Sun, J.; Leroy, A. K.] Ohio State Univ, Dept Astron, 140 West 18th Ave, Columbus, OH 43210 USA; [Emsellem, E.] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany; [Emsellem, E.] Univ Lyon, Univ Lyon1, ENS Lyon, CNRS,Ctr Rech Astrophys Lyon UMR5574, F-69230 St Genis Laval, France; [Klessen, R. S.; Glover, S. C. O.] Heidelberg Univ, Zentrum Astron, Albert Ueberle Str 2, D-69120 Heidelberg, Germany; [Klessen, R. S.] Heidelberg Univ, Interdisziplinares Zentrum Wissensch Rechnen, INF 205, D-69120 Heidelberg, Germany; [Salo, H.; Laurikainen, E.] Univ Oulu, Space Phys & Astron Res Unit, Pentti Kaiteran Katu 1, Oulu 90014, Finl...
推荐引用方式 GB/T 7714	Querejeta, M.,Schinnerer, E.,Meidt, S.,et al. Stellar structures, molecular gas, and star formation across the PHANGS sample of nearby galaxies[J],2021,656.
APA	Querejeta, M..,Schinnerer, E..,Meidt, S..,Sun, J..,Leroy, A. K..,...&Williams, T. G..(2021).Stellar structures, molecular gas, and star formation across the PHANGS sample of nearby galaxies.ASTRONOMY & ASTROPHYSICS,656.
MLA	Querejeta, M.,et al."Stellar structures, molecular gas, and star formation across the PHANGS sample of nearby galaxies".ASTRONOMY & ASTROPHYSICS 656(2021).