Sensitive CO(1–0) survey in Pegasus–Pisces reduces CO-dark gas inventory by a factor of 2

Autor:	Emmanuel Donate, Loris Magnani
Rok vydání:	2017
Předmět:	Physics Resolution (mass spectrometry) Molecular mass 010308 nuclear & particles physics Space and Planetary Science Molecular cloud 0103 physical sciences Astronomy and Astrophysics sense organs Astrophysics complex mixtures 010303 astronomy & astrophysics 01 natural sciences
Zdroj:	Monthly Notices of the Royal Astronomical Society. 472:3169-3176
ISSN:	1365-2966 0035-8711
Popis:	We conducted high-sensitivity, high-velocity resolution CO(1-0) observations in a region containing a portion of the diffuse molecular cloud MBM 53 to determine whether weak CO emission was present. The results of our observations increase the amount of CO-detectable molecular gas in the region by a factor of two. The increased molecular mass for the cloud, if applicable to the molecular clouds in the entire Pegasus-Pisces region, decreases the dark molecular gas content from 58% of the total H2 mass to ~ 30%. If the results for MBM53 are applicable to other diffuse clouds, then the fraction of dark gas directly detectable via sensitive CO(1-0) observations in diffuse molecular clouds is similar to that predicted by models for Giant Molecular Clouds.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b1fc46bdbe8981c29e5433b0a47cfcd6 https://doi.org/10.1093/mnras/stx2211 Zobrazit plný text záznamu