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Related papers: Shining A Light On Galactic Outflows: Photo-Ionize…

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We present a suite of one-dimensional spherically-symmetric hydrodynamic simulations that study the atomic ionization structure of galactic outflows. We track the ionization state of the outflowing gas with a non-equilibrium atomic…

Astrophysics of Galaxies · Physics 2019-05-01 William J Gray , Evan Scannapieco , Matthew D. Lehnert

Galactic outflows are believed to play an important role in regulating star formation in galaxies, but estimates of the outflowing mass and momentum have historically been based on uncertain assumptions. Here, we measure the mass, momentum,…

Astrophysics of Galaxies · Physics 2017-06-28 John Chisholm , Christy A. Tremonti , Claus Leitherer , Yanmei Chen

To reionize the early universe, high-energy photons must escape the galaxies that produce them. It has been suggested that stellar feedback drives galactic outflows out of star-forming regions, creating low density channels through which…

Astrophysics of Galaxies · Physics 2017-09-13 J. Chisholm , I. Orlitová , D. Schaerer , A. Verhamme , G. Worseck , Y. I. Izotov , T. X. Thuan , N. G. Guseva

We present spatially-resolved measurements of the ionized gas masses and mass outflow rates for six low-redshift ($z \leq$ 0.02) active galaxies. In this study, we expand our sample to galaxies with more complex gas kinematics modeled as…

Galactic outflows regulate the amount of gas galaxies convert into stars. However, it is difficult to measure the mass outflows remove because they span a large range of temperatures and phases. Here, we study the rest-frame ultraviolet…

Astrophysics of Galaxies · Physics 2017-12-27 J. Chisholm , R. Bordoloi , J. R. Rigby , M. Bayliss

We report on a sample of 51 nearby, star-forming galaxies observed with the Cosmic Origin Spectrograph on the Hubble Space Telescope. We calculate Si II kinematics and densities arising from warm gas entrained in galactic outflows. We use…

Astrophysics of Galaxies · Physics 2015-10-07 John Chisholm , Christina A. Tremonti , Claus Leitherer , Yanmei Chen , Aida Wofford , Britt Lundgren

We use the large spectroscopic data set of the MOSFIRE Deep Evolution Field survey to investigate the kinematics and energetics of ionised gas outflows. Using a sample of 598 star-forming galaxies at redshift 1.4 < $z$ < 3.8, we decompose…

To evaluate the impact of stellar feedback, it is critical to estimate the mass outflow rates of galaxies. Past estimates have been plagued by uncertain assumptions about the outflow geometry, metallicity, and ionization fraction. Here we…

Astrophysics of Galaxies · Physics 2016-08-17 John Chisholm , Christy A. Tremonti , Claus Leitherer , Yanmei Chen

Galactic-scale outflows regulate the stellar mass growth and chemical enrichment of galaxies, yet key outflow properties such as the chemical composition and mass loss rate remain largely unknown. We address these properties with Keck/ESI…

Astrophysics of Galaxies · Physics 2018-09-14 Tucker Jones , Daniel P. Stark , Richard S. Ellis

Active galactic nuclei (AGN) can launch outflows of ionized gas that may influence galaxy evolution, and quantifying their full impact requires spatially resolved measurements of the gas masses, velocities, and radial extents. We previously…

We measure Doppler shifts of interstellar absorption lines in HST/STIS spectra of individual star clusters in nearby UV-selected galaxies. Values for systemic velocities, which are needed to quantify outflow speeds, are taken from the…

Astrophysics · Physics 2008-11-26 C. M. Schwartz , C. L. Martin , R. Chandar , C. Leitherer , T. M. Heckman , M. S. Oey

We present semi-analytic models of galactic outflows, constrained by available observations on high redshift star formation and reionization. Galactic outflows are modeled in a manner akin to models of stellar wind blown bubbles. Large…

Astrophysics · Physics 2009-11-13 Saumyadip Samui , Kandaswamy Subramanian , Raghunathan Srianand

We report the results of analyses of galactic outflows in a sample of 45 low-redshift starburst galaxies in the COS Legacy Archive Spectroscopic SurveY (CLASSY), augmented by five additional similar starbursts with COS data. The outflows…

Galactic outflows provide important feedback effects to regulate the evolution of host galaxies. Two primary diagnostics of outflows are broad and/or blueshifted emission and absorption lines. Even though well-established methods exist to…

We investigate the properties of star formation-driven outflows by using a large spectroscopic sample of ~160,000 local "normal" star forming galaxies, drawn from the SDSS, spanning a wide range of star formation rates and stellar masses.…

Astrophysics of Galaxies · Physics 2016-03-16 Claudia Cicone , Roberto Maiolino , Alessandro Marconi

We selected 35 low-mass SFGs (7.9<log(M$_*$/M$_{\odot}$)<10.3) from deep spectroscopic surveys based on their CIII]1908 emission. We used follow-up NIR observations to examine their rest-optical emission lines and identify ionized outflow…

Astrophysics of Galaxies · Physics 2023-08-09 M. Llerena , R. Amorín , L. Pentericci , A. Calabrò , A. E. Shapley , K. Boutsia , E. Pérez-Montero , J. M. Vílchez , K. Nakajima

Galactic outflows are known to consist of several gas phases, however, so far the connection between these multiple phases has been investigated little and only in a few objects. In this paper, we analyse MUSE/VLT data of 26 local (U)LIRGs…

Absorption line studies are essential to understanding the origin, nature, and impact of starburst-driven galactic outflows. Such studies have revealed a multiphase medium with a number of poorly-understood features leading to a need to…

Astrophysics of Galaxies · Physics 2018-09-19 J'Neil Cottle , Evan Scannapieco , Marcus Bruggen

We investigate galactic-scale outflowing winds in 72 star-forming galaxies at z~1 in the Extended Groth Strip. Galaxies were selected from the DEEP2 survey and follow-up LRIS spectroscopy was obtained covering SiII, CIV, FeII, MgII, and MgI…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 K. A. Kornei , A. E. Shapley , C. L. Martin , A. L. Coil , J. M. Lotz , D. Schiminovich , K. Bundy , K. G. Noeske
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