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Galaxy environment plays a crucial role in quenching star formation in dwarf galaxies. In Milky Way (MW)-like environments, dwarf satellite quenching is primarily driven by ram pressure stripping (RPS), the direct removal of satellite gas…

Astrophysics of Galaxies · Physics 2026-04-10 Jingyao Zhu , Stephanie Tonnesen , Greg L. Bryan , Mary E. Putman

Observations of the low-mass satellites in the Local Group have shown high fractions of gas-poor, quiescent galaxies relative to isolated dwarfs, implying that the host halo environment plays an important role in the quenching of dwarf…

We present predictions for the quenching of star formation in satellite galaxies of the Local Group from a suite of 30 cosmological zoom simulations of Milky Way-like host galaxies. The Auriga simulations resolve satellites down to the…

Recent studies of galaxies in the local Universe, including those in the Local Group, find that the efficiency of environmental (or satellite) quenching increases dramatically at satellite stellar masses below ~ $10^8\ {\rm M}_{\odot}$.…

Isolated dwarf galaxies usually exhibit robust star formation but satellite dwarf galaxies are often devoid of young stars, even in Milky Way-mass groups. Dwarf galaxies thus offer an important laboratory of the environmental processes that…

Astrophysics of Galaxies · Physics 2023-06-07 Jenny E. Greene , Shany Danieli , Scott Carlsten , Rachael Beaton , Fangzhou Jiang , Jiaxuan Li

The evolution of dwarf satellites of the Milky Way is affected by the combination of ram pressure and tidal stripping, and internal feedback from massive stars. We investigate gas loss processes in the smallest satellites of the Milky Way…

Astrophysics of Galaxies · Physics 2016-08-03 Andrew Emerick , Mordecai-Mark Mac Low , Jana Grcevich , Andrea Gatto

We study the quenching of satellite galaxies by gradual depletion of gas due to star formation, by ram-pressure striping and by tidally triggered starburst. Using progenitors constrained by the empirical model of Lu et al., in which outflow…

Astrophysics of Galaxies · Physics 2015-06-16 Zhankui Lu , H. J. Mo

Ram pressure stripping is an important process in the evolution of both dwarf galaxies and large spirals. Large spirals are severely stripped in rich clusters and may be mildly stripped in groups. Dwarf galaxies can be severely stripped in…

Astrophysics · Physics 2011-02-11 J. A. Hester

We present 3D hydrodynamic simulations of ram pressure stripping in dwarf galaxies. Analogous studies on this subject usually deal with much higher ram pressures, typical of galaxy clusters, or mild ram pressure due to the gas halo of the…

Astrophysics · Physics 2009-11-10 A. Marcolini , F. Brighenti , A. D'Ercole

Low-mass galaxies are highly susceptible to environmental effects that can efficiently quench star formation. We explore the role of ram pressure in quenching low-mass galaxies ($M_{*}\sim10^{5-9}\,\rm{M}_{\odot}$) within 2 Mpc of Milky Way…

We combine observations of the Local Group with data from the NASA-Sloan Atlas to show the variation in the quenched fraction of satellite galaxies from low mass dwarf spheroidals and dwarf irregulars to more massive dwarfs similar to the…

Astrophysics of Galaxies · Physics 2015-06-22 Colin T. Slater , Eric F. Bell

We perform high-resolution N-Body+SPH simulations of gas-rich dwarf galaxy satellites orbiting within a Milky Way-sized halo and study for the first time the combined effects of tides and ram pressure. The structure of the galaxy models and…

Astrophysics · Physics 2009-11-11 Lucio Mayer , Chiara Mastropietro , James Wadsley , Joachim Stadel , Ben Moore

The circumgalactic medium (CGM) of star-forming dwarf galaxies plays a key role in regulating the galactic baryonic cycle. We investigate how susceptible the CGM of dwarf satellite galaxies is to ram pressure stripping (RPS) in Milky…

Astrophysics of Galaxies · Physics 2024-10-10 Jingyao Zhu , Stephanie Tonnesen , Greg L. Bryan , Mary E. Putman

We investigate the formation and evolution of dwarf galaxies in a high resolution, hydrodynamical cosmological simulation of a Milky Way sized halo and its environment. Our simulation includes gas cooling, star formation, supernova…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Till Sawala , Cecilia Scannapieco , Simon White

The underlying mechanisms driving the quenching of dwarf-mass satellite galaxies remain poorly constrained, but recent studies suggest they are particularly inefficient for those satellites with stellar mass 10$^{\rm 9}$ M$_{\odot}$. We…

Astrophysics of Galaxies · Physics 2015-08-14 Cameron Yozin , Kenji Bekki

We use SPH/N-body simulations to study the ram-pressure stripping of the gas of dwarf galaxies orbiting in a disc galaxy. The effects of the gaseous disc and halo on the satellites are analysed and the results are compared with the…

Astrophysics · Physics 2007-05-23 M. A. Gomez-Flechoso

We trace the cosmological origin of satellites around a dwarf galaxy using a very high resolution (12~pc/h) cosmological hydrodynamic zoom simulation. To realistically describe the formation and evolution of small-mass stellar satellites,…

Astrophysics of Galaxies · Physics 2019-09-04 Kyungwon Chun , Jihye Shin , Rory Smith , Sungsoo S. Kim

We are entering an era in which we will be able to detect and characterize hundreds of dwarf galaxies within the Local Volume. It is already known that a strong dichotomy exists in the gas content and star formation properties of field…

The faintest Local Group galaxies found lurking in and around the Milky Way halo provide a unique test bed for theories of structure formation and evolution on small scales. Deep Subaru and Hubble Space Telescope photometry demonstrates…

Astrophysics of Galaxies · Physics 2019-10-09 Donatella Romano , Francesco Calura , Annibale D'Ercole , C. Gareth Few

We use the \texttt{GRUMPY} galaxy formation model based on a suite of zoom-in, high-resolution, dissipationless $\Lambda$ Cold Dark Matter ($\Lambda$CDM) simulations of the Milky Way (MW) sized haloes to examine total matter density within…

Astrophysics of Galaxies · Physics 2023-08-02 Andrey Kravtsov , Zewei Wu
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