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We study the interstellar medium (ISM) properties as a function of the molecular gas size for 77 infrared-selected galaxies at $z \sim 1.3$. Molecular gas sizes are measured on ALMA images that combine CO(2-1), CO(5-4) and underlying…

The properties of the interstellar medium (ISM) surrounding a planetary system can impact planetary climate through a number of mechanisms, including changing the size of the astrosphere (one of the major shields for cosmic rays) as well as…

Astrophysics of Galaxies · Physics 2015-07-15 Marshall C. Johnson , Seth Redfield , Adam G. Jensen

We present magnetohydrodynamic (MHD) simulations of the star-forming multiphase interstellar medium (ISM) in stratified galactic patches with gas surface densities $\Sigma_\mathrm{gas} =$ 10, 30, 50, and 100 $\mathrm{M_\odot\,pc^{-2}}$. The…

Astrophysics of Galaxies · Physics 2023-04-14 Tim-Eric Rathjen , Thorsten Naab , Stefanie Walch , Daniel Seifried , Philipp Girichidis , Richard Wünsch

We have analyzed HCN(1-0) and CS(2-1) line profiles obtained with high signal-to-noise ratios toward distinct positions in three selected objects in order to search for small-scale structure in molecular cloud cores associated with regions…

Astrophysics of Galaxies · Physics 2011-08-31 L. E. Pirogov , I. I. Zinchenko

We discuss results from numerical simulations of star cluster formation in the turbulent interstellar medium (ISM). The thermodynamic behavior of the star-forming gas plays a crucial role in fragmentation and determines the stellar mass…

Astrophysics · Physics 2015-05-13 Ralf S. Klessen , Paul C. Clark , Simon C. O. Glover

Small-scale density fluctuations can significantly affect reionization but are typically modelled quite crudely. Unresolved fluctuations in numerical simulations and analytical calculations are included using a gas clumping factor,…

Cosmology and Nongalactic Astrophysics · Physics 2021-05-06 Michele Bianco , Ilian T. Iliev , Kyungjin Ahn , Sambit K. Giri , Yi Mao , Hyunbae Park , Paul R. Shapiro

The study of the development of structures on multiple scales in the cold interstellar medium has experienced rapid expansion in the past decade, on both the observational and the theoretical front. Spectral line studies at (sub-)millimeter…

High-resolution JWST-MIRI images now allow us to resolve in great detail the multi-scale nature of the emission in nearby star-forming galaxies, from compact star-forming regions to large-scale diffuse emission, giving new insights into…

We use high-resolution maps of the molecular interstellar medium (ISM) in the centres of eighty-six nearby galaxies from the millimetre-Wave Interferometric Survey of Dark Object Masses (WISDOM) and Physics at High Angular Resolution in…

Pulsar dispersion measures (DMs) have been used to model the electron density of the interstellar medium (ISM) in the Galactic disk as a plane-parallel medium, despite significant scatter in the DM-distance distribution and strong evidence…

Astrophysics of Galaxies · Physics 2020-07-10 Stella Koch Ocker , James M. Cordes , Shami Chatterjee

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

Stellar and nebular abundance indicators reveal that there exists significant abundance fluctuations in the interstellar medium (ISM) of gas-rich galaxies. It is shown that at the present observed solar level of O/H $\sim 6 \times 10^{-4}$,…

Astrophysics · Physics 2007-05-23 Jean-Rene ROY , Daniel KUNTH

The interstellar medium (ISM) is a key ingredient of galaxies and their evolution, consisting of multiphase, turbulent dust and gas. Some of the star-forming regions in our Galaxy originate from cloud-cloud and wind-cloud collisions, which…

Astrophysics of Galaxies · Physics 2024-07-17 Sebastián Navarrete , Bryan J. Pinargote , Wladimir E. Banda-Barragán

The [CII] 157.74 $\mu$m fine structure transition is one of the brightest and most well-studied emission lines in the far-infrared (FIR), produced in the interstellar medium (ISM) of galaxies. We study its properties in sub-pc resolution…

Astrophysics of Galaxies · Physics 2024-03-05 Alon Gurman , Chia-Yu Hu , Amiel Sternberg , Ewine F. van Dishoeck

Context: Dust grains undergo significant growth in star-forming environments, especially in dense regions prone to gravitational collapse. Although dust is generally assumed to represent $1 \%$ of the gas mass, dust density variations are…

Astrophysics of Galaxies · Physics 2026-01-14 V. Vallucci-Goy , P. Hennebelle , U. Lebreuilly , G. Verrier

We present new ALMA dust continuum observations of 101 $\log(\mathrm{M}_* / \mathrm{M}_\odot)$ > 9.5 galaxies in the COSMOS field to study the effect of environment on the interstellar medium at z ~ 0.7. At this redshift, our targets span a…

Astrophysics of Galaxies · Physics 2019-03-26 S. K. Betti , Alexandra Pope , N. Scoville , Min S. Yun , H. Aussel , J. Kartaltepe , K. Sheth

Supersonic flows in the interstellar medium (ISM) are believed to be a key driver of the molecular cloud formation and evolution. Among molecular clouds' properties, the ratio between the solenoidal and compressive modes of turbulence plays…

Astrophysics of Galaxies · Physics 2022-05-18 Masato I. N. Kobayashi , Tsuyoshi Inoue , Kengo Tomida , Kazunari Iwasaki , Hiroki Nakatsugawa

We present an empirical dynamical model of the local interstellar medium based on 270 radial-velocity measurements for 157 sight lines toward nearby stars. Physical-parameter measurements (i.e., temperature, turbulent velocity, depletions)…

Astrophysics · Physics 2007-09-28 Seth Redfield , Jeffrey L. Linsky

Observations have suggested substantial departures from pressure equilibrium in the interstellar medium (ISM) in the plane of the Galaxy, even on scales under 50 pc. Nevertheless, multi-phase models of the ISM assume at least locally…

Astrophysics · Physics 2007-05-23 Mordecai-Mark Mac Low , Dinshaw Balsara , Miguel A. Avillez , Jongsoo Kim

Abridged. Understanding the detailed structure of the interstellar gas is essential for our knowledge of the star formation process. The small-scale structure of the interstellar medium (ISM) is a direct consequence of the galactic scales…

Astrophysics of Galaxies · Physics 2018-03-21 Patrick Hennebelle