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Open AccessJournal ArticleDOI

Molecular gas in the Andromeda galaxy

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.

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Journal ArticleDOI

Galactic Structure Based on the ATLASGAL 870 μm Survey

TL;DR: The ATLASGAL 870 μm continuum survey conducted with the APEX telescope is the first one covering the whole inner Galactic plane (60° > l > 60° and b < ± 15) in submillimeter (submm) continuum emission tracing the cold dust of dense and young star-forming regions as mentioned in this paper.
Journal ArticleDOI

Synthesizing Observations and Theory to Understand Galactic Magnetic Fields: Progress and Challenges

TL;DR: In this paper, the authors present the present knowledge on azimuthal modes, field parities, and the properties of non-axisymmetric spiral features called magnetic arms.
Journal ArticleDOI

GASP. XXII. The Molecular Gas Content of the JW100 Jellyfish Galaxy at z ∼ 0.05: Does Ram Pressure Promote Molecular Gas Formation?

TL;DR: In this article, an unexpected large amount of molecular gas (∼ 2.5 × 10 10 M), 30% of which is located in the stripped gas tail out to ∼35 kpc from the galaxy center, was found.
Journal ArticleDOI

Properties of M31 - I. Dust. Basic properties and a discussion about age-dependent dust heating

TL;DR: In this article, the distribution of dust and its characteristics in the closest neighbor spiral galaxy M31 were analyzed using the Spitzer IRAC/MIPS maps of M31 and compared to dust emission models allowing us to constrain the dust mass, the intensity of the mean radiation field, the abundance of polycyclic aromatic hydrocarbon (PAH) particles.
Book ChapterDOI

Dynamics of Disks and Warps

TL;DR: In this paper, a review of theoretical work on the stellar dynamics of galaxy disks is presented, and all known collective global instabilities are identified, and their mechanisms described in terms of local wave mechanics.
References
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Journal ArticleDOI

A survey of interstellar H I from L-alpha absorption measurements. II

TL;DR: The Copernicus satellite surveyed the spectral region near L alpha to obtain column densities of interstellar HI toward 100 stars as discussed by the authors, and the value of the mean ratio of total neutral hydrogen to color excess was found to equal 5.8 x 10 to the 21st power atoms per (sq cm x mag).
Journal ArticleDOI

The Milky Way in Molecular Clouds: A New Complete CO Survey

TL;DR: In this article, a large-scale CO survey of the first and second Galactic quadrants and the nearby molecular cloud complexes in Orion and Taurus, obtained with the CfA 1.2 m telescope, was combined with 31 other surveys obtained over the past two decades with that instrument and a similar telescope on Cerro Tololo in Chile, to produce a new composite CO survey.
Journal ArticleDOI

Linear regression in astronomy. II

TL;DR: A wide variety of least-squares linear regression procedures used in observational astronomy, particularly investigations of the cosmic distance scale, are presented and discussed in this article, where a formula for the intercept offset between two parallel data sets, which propagates slope errors from one regression to the other, and a generalization of the Working-Hotelling confidence bands to nonstandard least squares lines.
Journal ArticleDOI

Determining structure in molecular clouds

TL;DR: In this paper, an automatic, objective routine for analyzing the clumpy structure in a spectral line position-position-velocity data cube is described, which works by first contouring the data at a multiple of the rms noise of the observations, then searching for peaks of emission which locate the clumps, and then following them down to lower intensities.
Journal ArticleDOI

The FCRAO Extragalactic CO Survey. I. The Data

TL;DR: In this article, the authors describe the galaxy sample, present the data, and determine global CO fluxes and radial distributions for the galaxies in the FCRAO Extragalactic CO Survey.
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