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200 papers

Fast radio bursts appear to exhibit large dispersion measures, typically exceeding any expected galactic interstellar contribution, especially along the moderate to high-galactic-latitude directions in which such events have been most often…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Brian Dennison

Molecular absorption lines measured along the line of sight of distant quasars are important probes of the gas evolution in galaxies as a function of redshift. A review is made of the handful of molecular absorbing systems studied so far,…

Astrophysics · Physics 2008-11-26 F. Combes

The increasing number of observations towards different environments in the Milky Way, as well as theoretical and experimental works, are improving our knowledge of the astrochemical processes in the interstellar medium (ISM). In this…

Astrophysics of Galaxies · Physics 2024-09-05 L. Colzi , V. M. Rivilla , M. T. Beltrán , C. Y. Law , E. Redaelli , M. Padovani

Millimeter (CO) observations of 5 double-nucleus ultraluminous infrared galaxy (ULIG) mergers are presented. With nuclear separations of 3-5 kpc, these galaxies are in the ``intermediate'' stages of the merger process. A preliminary…

Astrophysics · Physics 2009-09-25 A. S. Evans , J. A. Surace , J. M. Mazzarella , D. B Sanders

We report on first results of XMM-Newton observations of nearby starburst galaxies that form part of a multi-wavelength study of gaseous halos around late-type spiral galaxies and their dependence on the level of star formation activity in…

Astrophysics · Physics 2007-05-23 M. Ehle

Stars form in cold clouds of predominantly molecular (H2) gas. We are just beginning to understand how the formation, properties, and destruction of these clouds varies across the universe. In this chapter, we describe how the thermal line…

Astrophysics of Galaxies · Physics 2018-10-17 Adam K. Leroy , Alberto Bolatto , Erik Rosolowsky , Eva Schinnerer

The wavelength range 912-2000A (hereafter far-UV) provides access to absorption lines of the interstellar medium (ISM), circumgalactic medium (CGM), and intergalactic medium (IGM) in phases spanning a wide range of ionization, density,…

Astrophysics of Galaxies · Physics 2019-03-19 V. Lebouteiller , D. Kunth , J. Roman-Duval , P. Richter , C. Gry , B. James , A. Aloisi

It is now well established that chemistry in external galaxies is rich and complex. In this review I will explore whether one can use molecular emissions to determine their physical conditions. There are several considerations to bear in…

Astrophysics of Galaxies · Physics 2017-01-11 Serena Viti

We study the effects of feedback from active galactic nuclei (AGN) on emission from molecular gas in galaxy mergers by combining hydrodynamic simulations which include black holes with a three-dimensional, non-local thermodynamic…

The impact of non-thermal processes on the spectral energy distributions of galaxies can be dramatic, but such processes are often neglected in considerations of their structure and evolution. Particle acceleration associated with high mass…

High Energy Astrophysical Phenomena · Physics 2015-06-04 S. Ohm , J. A. Hinton

In these lectures I review observations of star-forming molecular clouds in our Galaxy and nearby galaxies to develop a physical intuition for understanding star formation in the local and high-redshift Universe. A lot of this material is…

Cosmology and Nongalactic Astrophysics · Physics 2012-11-05 Nick Z. Scoville

Active galactic nuclei (AGN) are one of the most luminous objects in the Universe, emitting powerful continuum and line emission across all wavelength bands. They represent an important link in the investigations of the galaxy evolution and…

The field of astrochemistry has seen major advances triggered by the completion of new powerful radio telescopes, with gains in sensitivity of receivers and in bandwidth. To date, about 330 molecular species are detected, in interstellar…

Astrophysics of Galaxies · Physics 2025-06-04 Charlotte Vastel , Francesco Fontani

ALMA will be able to detect a broad spectrum of molecular lines in galaxies. Current aperture synthesis observations indicate that the molecular line emission from galaxies is remarkably variable, even on kpc scales. Imaging spectroscopy at…

Astrophysics · Physics 2009-06-23 Jean L. Turner , David S. Meier

The sample of nearby LIRGs and ULIRGs for which dense molecular gas tracers have been measured is building up, allowing for the study of the physical and chemical properties of the gas in the variety of objects in which the most intense…

Astrophysics · Physics 2008-11-26 J. Gracia-Carpio , S. Garcia-Burillo , P. Planesas

Galaxies often contain large reservoirs of molecular gas which shape their evolution. This can be through cooling of the gas -- which leads to star formation, or accretion onto the central supermassive black hole -- which fuels AGN activity…

Astrophysics of Galaxies · Physics 2022-11-16 Tom Rose , B. R. McNamara , F. Combes , A. C. Edge , A. C. Fabian , M. Gaspari , H. Russell , P. Salomé , G. Tremblay , G. Ferland

We review the recent observations of protoplanetary disks together with relevant theoretical studies with an emphasis on the evolution of volatiles. In the last several years Atacama Large Millimeter/submillimeter Array (ALMA) provided…

Earth and Planetary Astrophysics · Physics 2024-11-05 Yuri Aikawa , Satoshi Okuzumi , Klaus Pontoppidan

Galactic winds are ubiquitously observed in galaxies both locally and in the high-redshift Universe. While these winds span many orders of magnitude in both temperature and density, observations of nearby galaxies show that the cold…

Astrophysics of Galaxies · Physics 2018-10-17 Justin Spilker , Kristina Nyland

This paper presents a review of ideas that interconnect Astrochemistry and Galactic Dynamics. Since these two areas are vast and not recent, each one has already been covered separately by several reviews. After a general historical…

Astrophysics of Galaxies · Physics 2021-05-25 E. Mendoza , N. Duronea , D. Ronsó , L. C. Corazza , F. van der Tak , S. Paron , L. -Å. Nyman

Long-duration gamma-ray bursts are associated with the explosions of massive stars and are accordingly expected to reside in star-forming regions with molecular gas (the fuel for star formation). Previous searches for carbon monoxide (CO),…

Astrophysics of Galaxies · Physics 2015-06-19 B. Hatsukade , K. Ohta , A. Endo , K. Nakanishi , Y. Tamura , T. Hashimoto , K. Kohno