ASTE Observations of Nearby Galaxies: A Tight Correlation between CO J = 3–2 Emission and H$\alpha$ | Zendy

Shinya Komugi | Zendy; Kotaro Kohno | Zendy; Tomoka Tosaki | Zendy; Hiroyuki Nakanishi | Zendy; Sachiko Onodera | Zendy; Fumi Egusa | Zendy; Yoshiaki Sofue | Zendy

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ASTE Observations of Nearby Galaxies: A Tight Correlation between CO J = 3–2 Emission and H$\alpha$

Author(s) -

Shinya Komugi,

Kotaro Kohno,

Tomoka Tosaki,

Hiroyuki Nakanishi,

Sachiko Onodera,

Fumi Egusa,

Yoshiaki Sofue

Publication year - 2007

Publication title -

publications of the astronomical society of japan

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.99

H-Index - 110

eISSN - 2053-051X

pISSN - 0004-6264

DOI - 10.1093/pasj/59.1.55

Subject(s) - physics , astrophysics , galaxy , extinction (optical mineralogy) , h alpha , star formation , alpha (finance) , telescope , astronomy , emission spectrum , optics , spectral line , statistics , psychometrics , construct validity , mathematics

Star formation rates (SFRs) obtained via extinction corrected H alpha arecompared to dense gas as traced by CO(J=3-2) emission at the centers of nearbygalaxies, observed with the ASTE telescope. It is found that, although many ofthe observed positions are dusty and therefore heavily absorbed at H alpha, theSFR shows a striking correlation with dense gas in the form of the Schmidt lawwith an index 1.0. The correlation is also compared between gas traced byCO(J=1-0) and application of H alpha extinction correction. We find that densegas produces a far better correlation with SFR in view of surface densityvalues.Comment: 6 pages, PASJ accepte

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