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
Citations
More filters
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.
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 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.
Journal ArticleDOI
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
More filters
Journal ArticleDOI
Cold Massive Molecular Clouds in the Inner Disk of M31
TL;DR: In this article, the authors presented new interferometric 12CO (1-0) and single-dish 12CO(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.
Journal ArticleDOI
Hydrodynamic simulations of the triaxial bulge of M31
TL;DR: In this paper, the potential of the stellar bulge is derived from its surface brightness profile, which is assumed to be triaxial and rotating in the same plane as the disk in order to explain the twisted nature of M31's central isophotes and the non circular gas velocities in the inner disk.
Journal ArticleDOI
Molecular Spiral Arms in M31
Laurent Loinard,Laurent Loinard,Thomas M. Dame,E. Koper,J. Lequeux,Patrick Thaddeus,Judith S. Young +6 more
TL;DR: In this paper, a high-resolution, high-sensitivity CO(1-0) survey of a large fraction of the south-west star-forming "ring" 20 kpc in diameter was made with the 14 m FCRAO telescope and its QUARRY receiver array.