CO-to-H2 conversion factor of molecular clouds using X-ray shadows

Yoshiaki Sofue; Jun Kataoka

doi:10.1093/pasj/psw038

CO-to-H₂ conversion factor of molecular clouds using X-ray shadows

Yoshiaki Sofue, Jun Kataoka

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

4 Citations (Scopus)

Abstract

A new method to determine the CO-to-H2 conversion factor XCO using absorption of diffuse X-ray emission by local molecular clouds was developed. It was applied to the Ophiuchus (G353+17) and Corona Australis (G35918) clouds using CO line and soft X-ray archival data. We obtained a value XCO = 1.85±0.45 1020 H2 cm^-2 (Kkms^-1)-1 as the average of least-2 fitting results for R4 (0.7 keV) and R5 (0.8 keV) bands.

Original language	English
Article number	L8
Journal	Publications of the Astronomical Society of Japan
Volume	68
Issue number	3
DOIs	https://doi.org/10.1093/pasj/psw038
Publication status	Published - 2016 Jun 1

Keywords

Clouds-ISM
Diffuse background
ISM
Lines and bands-ISM
Molecules-X-rays

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1093/pasj/psw038

Cite this

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title = "CO-to-H2 conversion factor of molecular clouds using X-ray shadows",

abstract = "A new method to determine the CO-to-H2 conversion factor XCO using absorption of diffuse X-ray emission by local molecular clouds was developed. It was applied to the Ophiuchus (G353+17) and Corona Australis (G35918) clouds using CO line and soft X-ray archival data. We obtained a value XCO = 1.85±0.45 1020 H2 cm-2 (Kkms-1)-1 as the average of least-2 fitting results for R4 (0.7 keV) and R5 (0.8 keV) bands.",

keywords = "Clouds-ISM, Diffuse background, ISM, Lines and bands-ISM, Molecules-X-rays",

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T1 - CO-to-H2 conversion factor of molecular clouds using X-ray shadows

AU - Sofue, Yoshiaki

AU - Kataoka, Jun

N1 - Publisher Copyright: © The Author 2016. Published by Oxford University Press on behalf of the Astronomical Society of Japan.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - A new method to determine the CO-to-H2 conversion factor XCO using absorption of diffuse X-ray emission by local molecular clouds was developed. It was applied to the Ophiuchus (G353+17) and Corona Australis (G35918) clouds using CO line and soft X-ray archival data. We obtained a value XCO = 1.85±0.45 1020 H2 cm-2 (Kkms-1)-1 as the average of least-2 fitting results for R4 (0.7 keV) and R5 (0.8 keV) bands.

AB - A new method to determine the CO-to-H2 conversion factor XCO using absorption of diffuse X-ray emission by local molecular clouds was developed. It was applied to the Ophiuchus (G353+17) and Corona Australis (G35918) clouds using CO line and soft X-ray archival data. We obtained a value XCO = 1.85±0.45 1020 H2 cm-2 (Kkms-1)-1 as the average of least-2 fitting results for R4 (0.7 keV) and R5 (0.8 keV) bands.

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KW - Molecules-X-rays

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