The growth and entrainment of cold gas in a hot wind
Max Gronke,S. Peng Oh +1 more
Reads0
Chats0
TLDR
In this paper, the authors showed that cooling is often not efficient enough to prevent the destruction of cold gas, and identified regions of parameter space where the cooling efficiency of the mixed, ''warm'' gas is sufficiently large to contribute new comoving cold gas which can significantly exceed the original cold gas mass.Abstract:
Both absorption and emission line studies show that cold gas around galaxies is commonly outflowing at speeds of several hundred km$\,\textrm{s}^{-1}$. This observational fact poses a severe challenge to our theoretical models of galaxy evolution since most feedback mechanisms (e.g., supernovae feedback) accelerate hot gas, and the timescale it takes to accelerate a blob of cold gas via a hot wind is much larger than the time it takes to destroy the blob. We revisit this long-standing problem using three-dimensional hydrodynamical simulations with radiative cooling. Our results confirm previous findings, that cooling is often not efficient enough to prevent the destruction of cold gas. However, we also identify regions of parameter space where the cooling efficiency of the mixed, `warm' gas is sufficiently large to contribute new comoving cold gas which can significantly exceed the original cold gas mass. This happens whenever, $t_{\mathrm{cool, mix}}/t_{\mathrm{cc}} < 1$, where $t_{\mathrm{cool,mix}}$ is the cooling time of the mixed warm gas and $t_{\mathrm{cc}}$ is the cloud-crushing time. This criterion is always satisfied for a large enough cloud. Cooling `focuses' stripped material onto the tail where mixing takes place and new cold gas forms. A sufficiently large simulation domain is crucial to capturing this behavior.read more
Citations
More filters
Journal ArticleDOI
UV and Hα HST Observations of Six GASP Jellyfish Galaxies
Marco Gullieuszik,Eric Giunchi,Bianca M. Poggianti,Alessia Moretti,Claudia Scarlata,Daniela Calzetti,A. Werle,Anita Zanella,Mario Radovich,Callum Bellhouse,D. Bettoni,Andrea Franchetto,Jacopo Fritz,Y. Jaff'e,Sean L. McGee,Matilde Mingozzi,Alessandro Omizzolo,Stephanie Tonnesen,Marc Verheijen,Benedetta Vulcani +19 more
TL;DR: In this paper , the authors used a combination of broadband (UV to I) filters and a narrowband Hα filter to detect star-forming clumps in the tails and disks of six jellyfish galaxies from the GASP survey.
Journal ArticleDOI
Multiphase turbulence in galactic haloes: effect of the driving
TL;DR: In this article , the authors investigate the effects of different types of forcing on the morphology of the gas, its temperature and density distributions, sources and sinks of enstrophy, as well as the kinematics of hot and cold X-ray emitting and H$\alpha$ emitting gas.
Journal ArticleDOI
Hubble Space Telescope [O III] emission-line kinematics in two nearby QSO2s: a case for X-ray feedback
Anna Trindade Falcao,S. B. Kraemer,Travis Fischer,D. M. Crenshaw,Mitchell Revalski,Henrique R. Schmitt,W. P. Maksym,Marianne Vestergaard,Marianne Vestergaard,Martin Elvis,C. M. Gaskell,Fred Hamann,Luis C. Ho,J. B. Hutchings,Richard F. Mushotzky,Hagai Netzer,Thaisa Storchi-Bergmann,T. J. Turner,Martin Ward +18 more
TL;DR: In this paper, a dynamical study of the narrow-line regions in two nearby type 2 quasars (QSO2s) is presented, based on detailed photoionization models of the emission line gas, including the effects of internal dust, to apply to observations of large-scale outflows from these active galactic nuclei (AGNs).
Journal ArticleDOI
Escaping the maze: a statistical sub-grid model for cloud-scale density structures in the interstellar medium
TL;DR: In this article , the authors derived a statistical model to calculate the unresolved small-scale ISM density structure from coarse-grained, volume-averaged quantities such as the gas clumping factor and mean density <ρ > V.
Journal ArticleDOI
VERTICO V: The environmentally driven evolution of the inner cold gas discs of Virgo cluster galaxies
Adam Bene Watts,Luca Cortese,Barbara Catinella,Toby Brown,Christine D. Wilson,N. Zabel,Ian D. Roberts,Timothy A. Davis,Mallory D. Thorp,Aeree Chung,Adam R. H. Stevens,Sara L. Ellison,Kristine Spekkens,Laura C. Parker,Yannick M. Bah'e,V. Villanueva,Mar'ia Jim'enez-Donaire,Dhruv Bisaria,Alessandro Boselli,Alberto D. Bolatto,Bumhyun Lee +20 more
TL;DR: In this article , the authors studied the H i and molecular gas within the optical discs of Virgo cluster galaxies on 1.2-kpc scales with spatially resolved scaling relations between stellar and molecular densities and found that the removal of neutral atomic hydrogen (H i) at large radii is well studied, while the environment impacts the remaining gas in the centres of galaxies, which are dominated by molecular gas.
References
More filters
Journal ArticleDOI
Cooling Functions for Low-Density Astrophysical Plasmas
TL;DR: In this article, the cooling functions for a plasma slab are investigated under equilibrium and nonequilibrium conditions, over a range of 10 4 -10 85 K and for a variety of abundances.
Journal ArticleDOI
Galactic Winds
TL;DR: Galactic winds are the primary mechanism by which energy and metals are recycled in galaxies and are deposited into the intergalactic medium New observations are revealing the ubiquity of this process, particularly at high redshift as discussed by the authors.
Journal ArticleDOI
yt: A Multi-code Analysis Toolkit for Astrophysical Simulation Data
Matthew J. Turk,Britton D. Smith,Jeffrey S. Oishi,Stephen Skory,Samuel W. Skillman,Tom Abel,Michael L. Norman +6 more
TL;DR: Yt, an open source, community-developed astrophysical analysis and visualization toolkit, is presented and its methods for reading, handling, and visualizing data, including projections, multivariate volume rendering, multi-dimensional histograms, halo finding, light cone generation, and topologically connected isocontour identification are reported.
Journal ArticleDOI
A Multi-Code Analysis Toolkit for Astrophysical Simulation Data
Matthew J. Turk,Britton D. Smith,Jeffrey S. Oishi,Stephen Skory,Samuel W. Skillman,Tom Abel,Michael L. Norman +6 more
TL;DR: In this paper is an open source, community-developed astrophysical analysis and visualization toolkit, which is oriented around physically relevant quantities rather than quantities native to astrophysical simulation codes, including Enzo's structure adaptive mesh refinement (AMR).
Journal ArticleDOI
Athena: a new code for astrophysical mhd
TL;DR: Results from a test suite which includes problems in one-, two-, and three-dimensions for both hydrodynamics and MHD are given, not only to demonstrate the fidelity of the algorithms, but also to enable comparisons to other methods.