Results 51 to 60 of about 159,862 (240)
Pegasus W: An Ultrafaint Dwarf Galaxy Outside the Halo of M31 Not Quenched by Reionization
The Astrophysical Journal, 2023 We report the discovery of an ultrafaint dwarf (UFD) galaxy, Pegasus W, located on the far side of the Milky Way–M31 system and outside the virial radius of M31.
Kristen B. W. McQuinn +5 more
doaj +1 more source
Bar quenching in gas-rich galaxies [PDF]
Astronomy & Astrophysics, 2018 Galaxy surveys have suggested that rapid and sustained decrease in the star-formation rate (SFR), “quenching”, in massive disk galaxies is frequently related to the presence of a bar. Optical and near-IR observations reveal that nearly 60% of disk galaxies in the local universe are barred, thus it is important to understand the relationship between ...
Khoperskov, S. +4 more
openaire +7 more sources
The Evolution of Environmental Quenching Timescales to $z\sim1.6$ [PDF]
, 2018 Using a sample of 4 galaxy clusters at $1.35 < z < 1.65$ and 10 galaxy clusters at $0.85 < z < 1.35$, we measure the environmental quenching timescale, $t_Q$, corresponding to the time required after a galaxy is accreted by a cluster for it to fully ...
Cerulo, P. +20 more
core +3 more sources
The Astrophysical Journal, 2023 We study the spatially resolved stellar populations of 444 galaxies at 0.3 < z < 6.0 in two clusters (WHL 0137–08 and MACS 0647+70) and a blank field, combining imaging data from the Hubble Space Telescope and JWST to perform spatially resolved spectral ...
Abdurro’uf +22 more
doaj +1 more source
The Hubble Sequence in Groups: The Birth of the Early-Type Galaxies [PDF]
, 2010 The physical mechanisms and timescales that determine the morphological signatures and the quenching of star formation of typical (~L*) elliptical galaxies are not well understood.
Carollo, C. M., Feldmann, R., Mayer, L.
core +2 more sources
Galaxy zoo: stronger bars facilitate quenching in star-forming galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACTWe have used Galaxy Zoo DECaLS (GZD) to study strong and weak bars in disc galaxies. Out of the 314 000 galaxies in GZD, we created a volume-limited sample (0.01 < z < 0.05, Mr < − 18.96) which contains 1867 galaxies with reliable volunteer bar classifications in the ALFALFA footprint.
Tobias Géron +6 more
openaire +4 more sources
Estimation of the Galaxy Quenching Rate in the Illustris Simulation [PDF]
, 2020 Quenching is a key topic in exploring the formation and evolution of galaxies. In this work, we study the quenching rate, i.e., the variation in the fraction of quenched galaxies per unit time, of the Illustris-1 simulation. By building the quenched fraction function $f(m,\rho, t)$ of each snapshot in the simulation, we derive an accurate form of ...
arxiv +1 more source
Bar quenching: Evidence from star-formation-rate indicators [PDF]
A&A 651, A107 (2021), 2021 The central regions of star-forming barred spiral galaxies can be devoid of star formation because of the redistribution of gas along the length of the bar. However, there can be gas outside the length of the bar that can host star formation. We study a sample of barred disc galaxies in the local Universe with an aim to discriminate between centrally ...
arxiv +1 more source
Do cluster properties affect the quenching rate? [PDF]
, 2014 The quenching rate is known to depend on galaxy stellar mass and environment, however, possible dependences on the hosting halo properties, such as mass, richness, and dynamical status, are still debated.
Andreon, S., Raichoor, A.
core +2 more sources
Using large galaxy surveys to distinguish z~0.5 quiescent galaxy models [PDF]
, 2014 One of the most striking properties of galaxies is the bimodality in their star-formation rates. A major puzzle is why any given galaxy is star-forming or quiescent, and a wide range of physical mechanisms have been proposed as solutions. We consider how
Cohn, J. D., White, Martin
core +2 more sources