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The properties of interstellar dust grains are being scrutinized more than ever before, with the advent of large facilities. Infrared emission from dust grains is a powerful asset than can help constrain their physical and chemical…

Models for the formation and evolution of galaxies readily predict physical properties such as the star formation rates, metal enrichment histories, and, increasingly, gas and dust content of synthetic galaxies. Such predictions are…

Cosmology and Nongalactic Astrophysics · Physics 2009-12-15 Charlie Conroy , Martin White , James E. Gunn

Observations give evidences of the presence of metals in the intergalactic medium (IGM). The stars responsible for transforming hydrogen and helium into more complex atoms do not form outside the galaxies in the standard scenario of galaxy…

Astrophysics · Physics 2009-11-11 Yohan Dubois , Romain Teyssier

The metal content of clusters of galaxies and its relation to their stellar content is revisited making use of a cluster sample for which all four basic parameters are homogeneously measured within consistent radii, namely core-excised…

Astrophysics of Galaxies · Physics 2015-06-22 A. Renzini , S. Andreon

The interstellar medium contains filamentary structure over a wide range of scales. Understanding the role of this structure, both as a conduit of gas across the scales and a diagnostic tool of local physics, is a major focus of star…

Astrophysics of Galaxies · Physics 2022-03-24 A. Hacar , S Clark , F. Heitsch , J. Kainulainen , G. Panopoulou , D. Seifried , R. Smith

The interstellar medium is characterised by an intricate filamentary network which exhibits complex structures. These show a variety of different shapes (e.g. junctions, rings, etc.) deviating strongly from the usually assumed cylindrical…

Astrophysics of Galaxies · Physics 2021-07-14 Elena Hoemann , Stefan Heigl , Andreas Burkert

Recently published paper [PRL 114, 147701 (2015)] contains several misleading statements and misinterpretations of known facts. The main massage of the paper [PRL 114, 147701 (2015)] is as follows: "We have shown that explicit symmetry…

Optics · Physics 2015-10-28 C. Simovski , A. Miroshnichenko , P. Belov , A. Krasnok

We present evidence of a >10-sigma detection of the 10 micron silicate dust absorption feature in the spectrum of the gravitationally lensed quasar PKS 1830-211, produced by a foreground absorption system at redshift 0.886. We have examined…

Astrophysics of Galaxies · Physics 2015-06-03 Monique C. Aller , Varsha P. Kulkarni , Donald G. York , Giovanni Vladilo , Daniel E. Welty , Debopam Som

In the past, laboratory experiments and theoretical calculations showed a mismatch in derived sticking properties of silicates in the context of planetesimal formation. It has been proposed by Kimura et al. (2015) that this mismatch is due…

Earth and Planetary Astrophysics · Physics 2019-05-29 Tobias Steinpilz , Jens Teiser , Gerhard Wurm

The interstellar medium (ISM) is the material that fills the space between the stars in all galaxies; it is a multi-phase medium in pressure equilibrium, with densities and temperatures covering over 6 orders of magnitude. Although…

Astrophysics of Galaxies · Physics 2025-04-03 Amelie Saintonge

Elemental and isotopic abundances are the fossils of galactic archaeology. The observed [X/Fe]-[Fe/H] relations in the Galactic bulge and disk and the mass-metallicity relation of galaxies are roughly reproduced with chemodynamical…

Astrophysics of Galaxies · Physics 2012-02-16 Chiaki Kobayashi

This paper provides a quantitative account of a recently introduced mechanism of mechanical alignment of suprathermally rotating grains. These rapidly rotating grains are essentially not susceptible to random torques arising from gas-grain…

Astrophysics · Physics 2009-10-28 Alex Lazarian , Michael Efroimsky

The interstellar medium (ISM) is an inseparable part of the Milky Way ecosystem whose evolutionary history remains a challenging question. We trace the evolution of the molecular ISM using a sample of Young Stellar Objects (YSO) association…

Astrophysics of Galaxies · Physics 2022-07-20 Guang-Xing Li , Ji-Xuan Zhou , Bing-Qiu Chen

The past century of interstellar dust has brought us from first ignoring it to finding that it is an important component of the interstellar medium and plays an important role in the evolution of galaxies, the formation of stars and…

Astrophysics · Physics 2007-05-23 Aigen Li , J. Mayo Greenberg

The bulk of cosmic matter resides in a dilute reservoir that fills the space between galaxies, the intergalactic medium (IGM). The history of this reservoir is intimately tied to the cosmic histories of structure formation, star formation,…

Cosmology and Nongalactic Astrophysics · Physics 2016-10-05 Matthew McQuinn

Gates et al (astro-ph/9606132) have raised several issues in their Comment on our Letter (Phys. Rev. Lett. Vol. 76, p.3886 (1996); astro-ph/9605001). We clarify these issues and show that our results are robust, and there is no…

Astrophysics · Physics 2007-05-23 R. Cowsik , Charu Ratnam , P. Bhattacharjee

The intergalactic magnetic field within filaments should be less polluted by magnetised outflows from active galaxies than magnetic fields in clusters. Therefore, filaments may be a better laboratory to study magnetic field amplification by…

Astrophysics · Physics 2009-11-13 M. Bruggen , M. Ruszkowski , A. Simionescu , M. Hoeft , C. Dalla Vecchia

We discuss the present state of knowledge and thought concerning the spread in age found among Galactic globular clusters, with some discussion of the implications for what happened during the earliest stages of the formation of the Milky…

Astrophysics · Physics 2009-07-28 Peter B. Stetson , Don A. VandenBerg , Michael Bolte

Observed metal abundances in the intracluster medium (ICM) of galaxy groups and clusters, $Z_{ICM}$, exceed what is expected from present-day stellar populations alone. Galaxy clusters are presumed to be near closed-box systems, allowing…

High Energy Astrophysical Phenomena · Physics 2025-11-21 Anne E Blackwell , Joel N Bregman , Sophia Chan Davis

The abundances of gas and dust (solids and complex molecules) in the interstellar medium (ISM) as well as their composition and structures impact practically all of astrophysics. Fundamental processes from star formation to stellar winds to…

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