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We present a detailed assessment of the global atomic hydrogen gas fraction in a sample of post-merger galaxies identified in the Sloan Digital Sky Survey (SDSS). Archival HI measurements of 47 targets are combined with new Arecibo…

Astrophysics of Galaxies · Physics 2018-05-23 Sara L. Ellison , Barbara Catinella , Luca Cortese

We study the baryon content of low mass galaxies selected from the Sloan Digital Sky Survey (SDSS DR8), focusing on galaxies in isolated environments where the complicating physics of galaxy-galaxy interactions are minimized. We measure…

Astrophysics of Galaxies · Physics 2015-08-26 Jeremy D. Bradford , Marla C. Geha , Michael R. Blanton

In this paper we study the molecular gas content of a representative sample of 67 of the most massive early-type galaxies in the local universe, drawn uniformly from the MASSIVE survey. We present new IRAM-30m telescope observations of 30…

We use cosmological hydrodynamical simulations to examine the physical properties of the gas in the circumgalactic media (CGM) of star-forming galaxies as a function of angular orientation. We utilise TNG50 of the IllustrisTNG project, as…

The use of galaxy clusters as cosmological probes hinges on our ability to measure their masses accurately and with high precision. Hydrostatic mass is one of the most common methods for estimating the masses of individual galaxy clusters,…

Cosmology and Nongalactic Astrophysics · Physics 2014-02-12 Kaylea Nelson , Erwin T. Lau , Daisuke Nagai , Douglas H. Rudd , Liang Yu

Galaxy clusters, the most massive, dark-matter-dominated, and most recently assembled structures in the Universe, are key tools for probing cosmology. However, uncertainties in scaling relations that connect cluster mass to observables like…

Cosmology and Nongalactic Astrophysics · Physics 2025-09-24 Giulia Cerini , Elena Bellomi , Nico Cappelluti , Sabina Khizroev , Erwin T. Lau , Priyamvada Natarajan , John ZuHone

Baryonic feedback is expected to play a key role in regulating the star formation of low-mass galaxies by producing galaxy-scale winds associated with mass-loading factors $\beta\!\sim\!1\!-\!50$. We have tested this prediction using a…

We present dynamical scaling relations for a homogeneous and representative sample of ~500 massive galaxies, selected only by stellar mass (>10^10 Msun) and redshift (0.025<z<0.05) as part of the ongoing GALEX Arecibo SDSS Survey. We…

Spherical density profiles and specific angular momentum profiles of Dark Matter halos found in cosmological N-body simulations have been measured extensively. The distribution of the total angular momentum of dark matter halos is also used…

Astrophysics · Physics 2017-08-23 Tom Abel , Rupert C. Croft , Lars Hernquist

The specific angular momenta ($j_t$) of stars, baryons as a whole and dark matter haloes contain clues of vital importance about how galaxies form and evolve. Using a sample of 70 spiral galaxies, we perform a preliminary analysis of $j_t$,…

Astrophysics of Galaxies · Physics 2023-08-22 Lan Zhang , Feilu Wang , Xiangxiang Xue , David Salzmann , Baifei Shen , Zehao Zhong , Gang Zhao

Gas masses tightly correlate with the virial masses of galaxy clusters, allowing for a precise determination of cosmological parameters by means of large-scale X-ray surveys. However, according to recent Suzaku X-ray measurements, gas mass…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 N. Battaglia , J. R. Bond , C. Pfrommer , J. L. Sievers

We investigate the co-evolution of the angular momentum of Milky Way-like galaxies, their circumgalactic gas, and their dark matter halos using zoom-in simulations from the Figuring Out Gas & Galaxies in Enzo (FOGGIE) suite. We examine how…

We use a combination of data from the MaNGA survey and MaNGA-like observations in IllustrisTNG100 to determine the prevalence of misalignment between the rotational axes of stars and gas. This census paper outlines the typical…

Astrophysics of Galaxies · Physics 2020-01-08 Christopher Duckworth , Rita Tojeiro , Katarina Kraljic

Here we utilise recent measures of galaxy total dynamical mass and X-ray gas luminosities (L$_{X,Gas}$) for a sample of 29 massive early-type galaxies from the SLUGGS survey to probe L$_{X,Gas}$--mass scaling relations. In particular, we…

Astrophysics of Galaxies · Physics 2016-10-26 Duncan A. Forbes , Adebusola Alabi , Aaron J. Romanowsky , Dong-Woo Kim , Jean P. Brodie , Giuseppina Fabbiano

This paper presents a new framework for understanding the relationship between a galaxy and its circumgalactic medium (CGM). It focuses on how imbalances between heating and cooling cause either expansion or contraction of the CGM. It does…

Astrophysics of Galaxies · Physics 2024-06-13 G. M. Voit , V. Pandya , D. B. Fielding , G. L. Bryan , C. Carr , M. Donahue , B. D. Oppenheimer , R. S. Somerville

The angular momentum properties of virialised dark matter haloes have been measured with good statistics in collisionless N-body simulations, but an equally accurate analysis of the baryonic spin is still missing. We employ the Illustris…

Cosmology and Nongalactic Astrophysics · Physics 2017-01-18 Jolanta Zjupa , Volker Springel

Recent integral field spectroscopy observations have found that about 11% of galaxies show star-gas misalignment. The misalignment possibly results from external effects such as gas accretion, interaction with other objects, and other…

As the largest gravitationally bound objects in the universe, clusters of galaxies may contain a fair sample of the baryonic mass fraction of the universe. Since the gas mass fraction from the hot ICM is believed to be constant in time, the…

Astrophysics · Physics 2009-10-30 K. Rines , W. Forman , U. Pen , C. Jones , R. Burg

Observations of the interstellar medium are key to deciphering the physical processes regulating star formation in galaxies. However, observational uncertainties and detection limits can bias the interpretation unless carefully modeled.…

Astrophysics of Galaxies · Physics 2020-12-14 Robert Feldmann

Aims: At intermediate redshift, galaxy groups/clusters are thought to impact galaxies (e.g. their angular momentum). We investigate whether the environment has an impact on the galaxies' angular momentum and identify underlying driving…

Astrophysics of Galaxies · Physics 2023-09-20 W. Mercier , B. Epinat , T. Contini , D. Krajnović , L. Ciesla , B. C. Lemaux , V. Abril-Melgarejo , L. Boogaard , D. Pelliccia
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