Results 101 to 110 of about 282,692 (200)

Stellar-Mass Black Holes

Symmetry
Stellar-mass black holes (3 M⊙≲MBH≲150 M⊙) are the natural product of the evolution of heavy stars (Mstar≳20 M⊙). In our Galaxy, we expect that 108–109 stellar-mass black holes have been formed from the gravitational collapse of heavy stars, but currently we know fewer than 100 objects.
openaire   +2 more sources

The Outskirt Stellar Mass of Low-redshift Massive Galaxies Is an Excellent Halo Mass Proxy in Illustris/IllustrisTNG Simulations

The Astrophysical Journal
Recent observations suggest that the extended stellar halos of low-redshift massive galaxies are tightly connected to the assembly of their dark matter halos.
Shuo Xu, Song Huang, Alexie Leauthaud, Benedikt Diemer, Katya Leidig, Carlo Cannarozzo, Conghao Zhou   +6 more
doaj   +1 more source

On the Signature of Black Holes on the Quenched Stellar Mass Function

The Astrophysical Journal
As star-forming galaxies approach or exceed a stellar mass of around 10 ^11 M _⊙ , they are increasingly likely to be quenched in a process generically called mass quenching.
Antonio J. Porras-Valverde, John C. Forbes   +1 more
doaj   +1 more source

Mass Ejection Driven by Sudden Energy Deposition in Stellar Envelopes

The Astrophysical Journal
A number of stellar astrophysical phenomena, such as tidal novae and planetary engulfment, involve sudden injection of subbinding energy in a thin layer within the star, leading to mass ejection of the stellar envelope.
Nicholas J. Corso, Dong Lai
doaj   +1 more source

Shooting for the Stars: Jet-mode Feedback and AGN Jet Deceleration from Stellar Mass Loading

The Astrophysical Journal
Active Galactic Nucleus (AGN) jets are thought to be vital ingredients in galaxy evolution through the action of kinetic feedback; however, how narrow, relativistic outflows couple to galaxies remains an open question.
Talia M. O’Shea, Sebastian Heinz, Melinda Soares-Furtado, Zsofi Igo, Andrea Merloni   +4 more
doaj   +1 more source

Evidence that Mass Loss on the Red Giant Branch Decreases with Metallicity

The Astrophysical Journal
Mass loss on the red giant branch (RGB) influences stellar evolution, properties of stellar populations, and Galactic chemical enrichment, yet remains poorly constrained observationally. Current models provide limited insight into how stellar properties,
Yaguang Li
doaj   +1 more source

Large Dark Matter Content and Steep Metallicity Profile Predicted for Ultradiffuse Galaxies Formed in High-spin Halos

The Astrophysical Journal
We study the stellar properties of a sample of simulated ultradiffuse galaxies (UDGs) with stellar mass M _⋆ = 10 ^7.5 –10 ^9 M _⊙ , selected from the TNG50 simulation, where UDGs form mainly in high-spin dwarf-mass halos.
José A. Benavides, Laura V. Sales, Mario. G. Abadi, Mark Vogelsberger, Federico Marinacci, Lars Hernquist   +5 more
doaj   +1 more source

Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data

The Open Journal of Astrophysics
We develop a framework to study the relation between the stellar mass of a galaxy and the total mass of its host dark matter halo using galaxy clustering and galaxy-galaxy lensing measurements. We model a wide range of scales, roughly from $\sim 100 \; {\
G. Zacharegkas, C. Chang, J. Prat, W. Hartley, S. Mucesh, A. Alarcon, O. Alves, A. Amon, K. Bechtol, M. R. Becker, G. Bernstein, J. Blazek, A. Campos, A. Carnero Rosell, M. Carrasco Kind, R. Cawthon, R. C. Chen, A. Choi, J. Cordero, C. P. Davis, J. DeRose, H. Diehl, S. Dodelson, C. Doux, A. Drlica-Wagner, K. Eckert, T. F. Eifler, J. Elvin-Poole, S. Everett, X. Fang, A. Ferte, M. Gatti, G. Giannini, D. Gruen, R. A. Gruendl, I. Harrison, H. Huang, E. M. Huff, M. Jarvis, E. Krause, N. Kuropatkin, P. F. Leget, N. MacCrann, J. McCullough, J. Myles, A. N. Alsina, S. Pandey, M. Raveri, R. P. Rollins, A. Roodman, A. J. Ross, E. Rykoff, C. Sánchez, L. F. Secco, I. Sevilla-Noarbe, E. Sheldon, T. Shin, M. A. Troxel, I. Tutusaus, B. Yanny, B. Yin, Y. Zhang, J. Zuntz, M. Aguena, F. Andrade-Oliveira, D. Bacon, D. Brooks, D. L. Burke, J. Carretero, F. J. Castander, L .N. da Costa, M. E. da Silva Pereira, T. M. Davis, J. De Vicente, B. Flaugher, J. Frieman, J. Garcia-Bellido, E. Gaztañaga, G. Gutierrez, S. R. Hinton, D. L. Hollowood, D. J. James, K. Kuehn, O. Lahav, S. Lee, J. L. Marshall, J. Mena-Fernandez, R. Miquel, J. J. Mohr, R. L. C. Ogando, A. A. Plazas Malagon, A. Porredon, S. Samuroff, E. Sanchez, M. Smith, M. Soares-Santos, E. Suchyta, M. E. C. Swanson, D. L. Tucker, V. Vikram, N. Weaverdyck, P. Wiseman, M. Yamamoto   +102 more
doaj   +1 more source

Environmental Evidence for Overly Massive Black Holes in Low-mass Galaxies and a Black Hole–Halo Mass Relation at z ∼ 5

The Astrophysical Journal
JWST observations have unveiled faint active galactic nuclei (AGNs) at high redshift that provide insights into the formation of supermassive black holes (SMBHs). However, disentangling their stellar from AGN light is challenging.
Jorryt Matthee, Rohan P. Naidu, Gauri Kotiwale, Lukas J. Furtak, Ivan Kramarenko, Ruari Mackenzie, Jenny Greene, Angela Adamo, Rychard J. Bouwens, Claudia Di Cesare, Anna-Christina Eilers, Anna de Graaff, Kasper E. Heintz, Daichi Kashino, Michael V. Maseda, Sandro Tacchella, Alberto Torralba   +16 more
doaj   +1 more source

Metallicities and Refined Stellar Parameters for 52 Cool Dwarfs with Transiting Planets and Planet Candidates

The Astrophysical Journal Supplement Series
We collected near-infrared spectra of 65 cool stars with the NASA Infrared Telescope Facility and analyzed them to calculate accurate metallicities and stellar parameters.
Rebecca Gore, Steven Giacalone, Courtney D. Dressing, Emma V. Turtelboom, Ashley Schroeder, Charles D. Fortenbach, Kevin K. Hardegree-Ullman, Jon K. Zink, Andrew W. Mayo, Joshua E. Schlieder, Jessie L. Christiansen   +10 more
doaj   +1 more source