The Effects of Photoionization on Galaxy Formation - II: Satellites in the Local Group

August 13, 2001

Local Group Dwarf Galaxies: Nature And Nurture

March 23, 2011

89% Match

Till Sawala, Cecilia Scannapieco, Simon White

Cosmology and Nongalactic As...

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 feedback, metal enrichment and UV heating. In total, 90 satellites and more than 400 isolated dwarf galaxies are formed in the simulation, allowing a systematic study of the internal and environmental processes that determine their evolution. We fi...

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The Formation History of the Ultra-Faint Dwarf Galaxies

October 2, 2013

89% Match

Thomas M. Brown, Jason Tumlinson, Marla Geha, Evan Kirby, Don A. VandenBerg, Jason S. Kalirai, Joshua D. Simon, Roberto J. Avila, Ricardo R. Munoz, Puragra Guhathakurta, Alvio Renzini, Henry C. Ferguson, ... , Gennaro Mario

Cosmology and Nongalactic As...

Astrophysics of Galaxies

We present early results from a Hubble Space Telescope survey of the ultra-faint dwarf galaxies. These Milky Way satellites were discovered in the Sloan Digital Sky Survey, and appear to be an extension of the classical dwarf spheroidals to low luminosities, offering a new front in the efforts to understand the missing satellite problem. Because they are the least luminous, most dark matter dominated, and least chemically evolved galaxies known, the ultra-faint dwarfs are the...

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Modeling the Connection Between Subhalos and Satellites in Milky Way-like Systems

September 14, 2018

89% Match

Ethan O. Nadler, Yao-Yuan Mao, ... , Wechsler Risa H.

Astrophysics of Galaxies

Cosmology and Nongalactic As...

We develop a comprehensive and flexible model for the connection between satellite galaxies and dark matter subhalos in dark matter-only zoom-in simulations of Milky Way (MW)--mass host halos. We systematically identify the physical and numerical uncertainties in the galaxy--halo connection and simulations underlying our method, including (i) the influence of host halo properties; (ii) the relationship between satellite luminosities and subhalo properties, including the effec...

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Satellite Systems around Galaxies in Hydrodynamic Simulations

July 11, 2006

89% Match

Noam I Libeskind, Shaun Cole, Carlos S Frenk, ... , Jenkins Adrian

Astrophysics

We investigate the properties of satellite galaxies formed in N-body/SPH simulations of galaxy formation in the $\Lambda$CDM cosmology. The simulations include the main physical effects thought to be important in galaxy formation and, in several cases, produce realistic spiral discs. In total, a sample of 9 galaxies of luminosity comparable to the Milky Way was obtained. At magnitudes brighter than the resolution limit, $M_V=-12$, the luminosity function of the satellite gala...

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The LBT Satellites of Nearby Galaxies Survey (LBT-SONG): The Diffuse Satellite Population of Local Volume Hosts

September 6, 2024

89% Match

A. Bianca Davis, Christopher T. Garling, Anna M. Nierenberg, Annika H. G. Peter, Amy Sardone, Christopher S. Kochanek, Adam K. Leroy, Kirsten J. Casey, Richard W. Pogge, Daniella M. Roberts, ... , Greco Johnny P.

Astrophysics of Galaxies

Cosmology and Nongalactic As...

We present the results of the Large Binocular Telescope Satellites Of Nearby Galaxies Survey (LBT-SONG) ``Far Sample,'' including survey completeness estimates. We find 10 satellite candidates in the inner virial regions of 13 star-forming galaxies outside the Local Group. The hosts are at distances between $\sim 5-11$ Mpc and have stellar masses in the little explored range of $\sim 5 \times 10^8 - 5\times 10^{10}~\text{M}_{\odot}$. Among the 10 satellite candidates, 3 are n...

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Milky Way Satellite Census. II. Galaxy--Halo Connection Constraints Including the Impact of the Large Magellanic Cloud

December 6, 2019

89% Match

E. O. DES Collaboration Nadler, R. H. DES Collaboration Wechsler, K. DES Collaboration Bechtol, Y. -Y. DES Collaboration Mao, G. DES Collaboration Green, A. DES Collaboration Drlica-Wagner, M. DES Collaboration McNanna, S. DES Collaboration Mau, A. B. DES Collaboration Pace, J. D. DES Collaboration Simon, A. DES Collaboration Kravtsov, S. DES Collaboration Dodelson, T. S. DES Collaboration Li, A. H. DES Collaboration Riley, M. Y. DES Collaboration Wang, T. M. C. DES Collaboration Abbott, M. DES Collaboration Aguena, S. DES Collaboration Allam, J. DES Collaboration Annis, S. DES Collaboration Avila, G. M. DES Collaboration Bernstein, E. DES Collaboration Bertin, D. DES Collaboration Brooks, D. L. DES Collaboration Burke, A. Carnero DES Collaboration Rosell, M. Carrasco DES Collaboration Kind, J. DES Collaboration Carretero, M. DES Collaboration Costanzi, Costa L. N. DES Collaboration da, Vicente J. DES Collaboration De, S. DES Collaboration Desai, A. E. DES Collaboration Evrard, B. DES Collaboration Flaugher, P. DES Collaboration Fosalba, J. DES Collaboration Frieman, J. DES Collaboration García-Bellido, E. DES Collaboration Gaztanaga, D. W. DES Collaboration Gerdes, D. DES Collaboration Gruen, J. DES Collaboration Gschwend, G. DES Collaboration Gutierrez, W. G. DES Collaboration Hartley, S. R. DES Collaboration Hinton, K. DES Collaboration Honscheid, E. DES Collaboration Krause, K. DES Collaboration Kuehn, N. DES Collaboration Kuropatkin, O. DES Collaboration Lahav, M. A. G. DES Collaboration Maia, J. L. DES Collaboration Marshall, F. DES Collaboration Menanteau, R. DES Collaboration Miquel, A. DES Collaboration Palmese, F. DES Collaboration Paz-Chinchón, A. A. DES Collaboration Plazas, E. DES Collaboration Sanchez, B. DES Collaboration Santiago, V. DES Collaboration Scarpine, S. DES Collaboration Serrano, M. DES Collaboration Smith, M. DES Collaboration Soares-Santos, E. DES Collaboration Suchyta, G. DES Collaboration Tarle, D. DES Collaboration Thomas, ... , Walker A. R. DES Collaboration

Astrophysics of Galaxies

Cosmology and Nongalactic As...

The population of Milky Way (MW) satellites contains the faintest known galaxies and thus provides essential insight into galaxy formation and dark matter microphysics. Here we combine a model of the galaxy--halo connection with newly derived observational selection functions based on searches for satellites in photometric surveys over nearly the entire high Galactic latitude sky. In particular, we use cosmological zoom-in simulations of MW-like halos that include realistic L...

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Reconciling dwarf galaxies with LCDM cosmology: Simulating a realistic population of satellites around a Milky Way-mass galaxy

February 18, 2016

89% Match

Andrew R. Wetzel, Philip F. Hopkins, Ji-hoon Kim, Claude-Andre Faucher-Giguere, ... , Quataert Eliot

Astrophysics of Galaxies

Low-mass "dwarf" galaxies represent the most significant challenges to the cold dark matter (CDM) model of cosmological structure formation. Because these faint galaxies are (best) observed within the Local Group (LG) of the Milky Way (MW) and Andromeda (M31), understanding their formation in such an environment is critical. We present first results from the Latte Project: the Milky Way on FIRE (Feedback in Realistic Environments). This simulation models the formation of a MW...

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The Missing Satellite Problem Outside of the Local Group. II. Statistical Properties of Satellites of Milky Way-like Galaxies

July 25, 2022

89% Match

Masashi Nashimoto, Masayuki Tanaka, Masashi Chiba, Kohei Hayashi, ... , Okamoto Takashi

Astrophysics of Galaxies

We present a new observation of satellite galaxies around seven Milky Way (MW)-like galaxies located outside of the Local Group (LG) using Subaru/Hyper Suprime-Cam imaging data to statistically address the missing satellite problem. We select satellite galaxy candidates using magnitude, surface brightness, S\'{e}rsic index, axial ratio, full width half maximum, and surface brightness fluctuation cuts, followed by visual screening of false-positives such as optical ghosts of b...

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The SAGA Survey. IV. The Star Formation Properties of 101 Satellite Systems around Milky Way-mass Galaxies

April 22, 2024

89% Match

Marla 5 and 6 Geha, Yao-Yuan 5 and 6 Mao, Risa H. 5 and 6 Wechsler, Yasmeen 5 and 6 Asali, Erin 5 and 6 Kado-Fong, Nitya 5 and 6 Kallivayalil, Ethan O. 5 and 6 Nadler, Erik J. 7 and 10 Tollerud, Benjamin 7 and 10 Weiner, Mithi A. C. de los 7 and 10 Reyes, ... , Wu John F. 7 and 10

Astrophysics of Galaxies

Cosmology and Nongalactic As...

We present the star-forming properties of 378 satellite galaxies around 101 Milky Way analogs in the Satellites Around Galactic Analogs (SAGA) Survey, focusing on the environmental processes that suppress or quench star formation. In the SAGA stellar mass range of 10^6 to 10^10 solar masses, we present quenched fractions, star-forming rates, gas-phase metallicities, and gas content. The fraction of SAGA satellites that are quenched increases with decreasing stellar mass and s...

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Satellites of Simulated Galaxies: survival, merging, and their relation to the dark and stellar halos

April 13, 2007

89% Match

L. V. Sales, J. F. Navarro, ... , Steinmetz M.

Astrophysics

We study the population of satellite galaxies formed in a suite of N-body/gasdynamical simulations of galaxy formation in a LCDM universe. We find little spatial or kinematic bias between the dark matter and the satellite population. The velocity dispersion of the satellites is a good indicator of the virial velocity of the halo: \sigma_{sat}/V_{vir}=0.9 +/- 0.2. Applied to the Milky Way and M31 this gives V_{vir}^{MW}=109 +/- 22$ km/s and V_{vir}^{M31} = 138 +/- 35 km/s, res...

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