Molecular gas in the Andromeda galaxy
Ch. Nieten,N. Neininger,N. Neininger,M. Guelin,H. Ungerechts,R. Lucas,Elly M. Berkhuijsen,Rainer Beck,Richard Wielebinski +8 more
TLDR
M 31, the closest large spiral galaxy to our own, is the best object for studying molecular clouds and their relation to the spiral structure as discussed by the authors, and it is also one of the best places where to estimate molecular clouds masses through the Virial Theorem.Abstract:
M 31, the closest large spiral galaxy to our own, is the best object for studying molecular clouds and their relation to the spiral structure. As one of the astronomical objects with the best known distance (0.78 ± 0.02 Mpc), it is also one of the best places where to estimate molecular clouds masses through the Virial Theorem.read more
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Book
Physics of the Interstellar and Intergalactic Medium
TL;DR: In this paper, a comprehensive and richly illustrated textbook on the astrophysics of the interstellar and intergalactic medium is presented, including the gas and dust, as well as the electromagnetic radiation, cosmic rays, and magnetic and gravitational fields, present between the stars in a galaxy and also between galaxies themselves.
Journal ArticleDOI
The Role of Pressure in GMC Formation II: The H2-Pressure Relation
Leo Blitz,Erik Rosolowsky +1 more
TL;DR: In this article, the authors show that the ratio of molecular to atomic gas in galaxies is determined by hydrostatic pressure and that the relation between the two is nearly linear, and propose a modified star formation prescription based on pressure determining the degree to which the ISM is molecular.
Journal ArticleDOI
The CO-to-H2 Conversion Factor from Infrared Dust Emission across the Local Group
Adam K. Leroy,Alberto D. Bolatto,Karl D. Gordon,Karin Sandstrom,Pierre Gratier,Erik Rosolowsky,Charles W. Engelbracht,N. Mizuno,Edvige Corbelli,Yasuo Fukui,Akiko Kawamura +10 more
TL;DR: In this paper, the authors estimate the conversion factor relating CO emission to H2 mass, αCO, in five Local Group galaxies that span approximately an order of magnitude in metallicity.
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The CO-to-H2 Conversion Factor From Infrared Dust Emission Across the Local Group
Adam K. Leroy,Alberto D. Bolatto,Karl D. Gordon,Karin Sandstrom,Pierre Gratier,Erik Rosolowsky,Charles W. Engelbracht,N. Mizuno,Edvige Corbelli,Yasuo Fukui,Akiko Kawamura +10 more
TL;DR: In this paper, the authors modeled the dust mass along the line of sight from infrared (IR) emission and then solved for the alpha-CO that best allows a single gas-to-dust ratio (delta_GDR) to describe each system.
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On the fraction of star formation occurring in bound stellar clusters
TL;DR: In this article, the authors present a theoretical framework in which bound stellar clusters arise naturally at the high-density end of the hierarchy of the interstellar medium (ISM) and due to short free-fall times, these high density regions achieve high local star formation efficiencies, enabling them to form bound clusters.
References
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Posted Content
Cold Massive Molecular Clouds in the Inner Disk of M31
TL;DR: In this paper, the authors present new interferometric CO(1-0) and single-dish CO(3-2) observations of the central parts of D478, a large (> 200 pc) dark dust cloud located in a quiescent region of the inner disk of M31 where single-and multi-scale CO(2-1) observations were previously obtained.
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The Andromeda galaxy.
TL;DR: In this article, a comparison of M31 with the Milky Way is presented, showing that M31 has a Galaxian nature, while M31 does not. But M31 is more stable than M31.
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Molecules in galaxies. I: CO observations in a spiral arm of M31
Barbara S. Ryden,Antony A. Stark +1 more
TL;DR: In this paper, a 4 x 20 arcmin spiral arm region of M31 is mapped in C-12O (J = 1-0), using the Bell Laboratories 7 m antenna.
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Improving the triaxial bulge model of M31
S. L. Berman,Laurent Loinard +1 more
TL;DR: In this article, a detailed hydrodynamical model of the gas flow in the triaxial gravitational potential of the bulge of the Andromeda galaxy (M31) has been proposed by Berman, and shown to provide excellent agreement with the CO emission-line velocities observed along its major axis.
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Neutral hydrogen in the Andromeda Nebula – III. The velocity field
TL;DR: In this article, les cartes de contour des vitesses radiales for les 20 kpc entourant le noyau are presented, and the dynamique du gaz d'hydrogene neutre dans le disque de la galaxie.