Results 71 to 80 of about 11,340 (164)

Stellar masses and mass ratios for Gaia open cluster members

Astronomy & Astrophysics
Context. Unresolved binaries in star clusters can bias stellar and cluster mass estimates. A proper treatment is therefore essential for studying the cluster dynamics and evolution. Aims.
Malhotra Sagar, Castro-Ginard Alfred, Anders Friedrich, Jordi Carme, Donada Judit, Luri Xavier, Balaguer-Núñez Lola, Qin Songmei, Jiang Yueyue, Župić Andrija   +9 more
doaj   +1 more source

Statistical Predictions of the Accreted Stellar Halos around Milky Way-Like Galaxies

The Open Journal of Astrophysics
In the $Λ$CDM paradigm, stellar halos form through the accretion and disruption of satellite galaxies. We introduce new semi-analytic modeling within the SatGen framework to track the ex-situ stellar components of Milky Way--like galaxies across large ...
J. Sebastian Monzon, Frank C. van den Bosch, Martin P. Rey   +2 more
doaj   +1 more source

Coevolution of Nuclear Star Clusters and Massive Black Holes: Extreme-mass-ratio Inspirals

The Astrophysical Journal
We explore extreme-mass-ratio inspirals (EMRIs) in the coevolution of massive black holes (MBHs) and nuclear star clusters (NSCs), which host diverse stellar populations across a wide range of masses. The dynamics are simulated self-consistently with GNC
Fupeng Zhang, Pau Amaro Seoane
doaj   +1 more source

Exploring the Evolution of a Dwarf Spheroidal Galaxy with Smoothed-particle Hydrodynamics Simulations. I. Stellar Feedback

The Astrophysical Journal
A fundamental question regarding the evolution of dwarf spheroidal galaxies is the identification of the key physical mechanisms responsible for gas depletion.
Roberto Hazenfratz, Paramita Barai, Gustavo A. Lanfranchi, Anderson Caproni   +3 more
doaj   +1 more source

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

A Census of Star Formation Histories of Massive Galaxies at 0.6 < z < 1 from Spectrophotometric Modeling Using Bagpipes and Prospector

The Astrophysical Journal
We present individual star formation histories (SFHs) of ∼3000 massive galaxies (log( M _* / M _⊙ ) > 10.5) from the Large Early Galaxy Astrophysics Census spectroscopic survey at a lookback time of ∼7 billion yr and quantify the population trends ...
Yasha Kaushal, Angelos Nersesian, Rachel Bezanson, Arjen van der Wel, Joel Leja, Adam Carnall, Anna Gallazzi, Stefano Zibetti, Gourav Khullar, Marijn Franx, Adam Muzzin, Anna de Graaff, Camilla Pacifici, Katherine E. Whitaker, Eric F. Bell, Marco Martorano   +15 more
doaj   +1 more source

The z = 9.625 Cosmic Gems galaxy was a compact “blue monster” propelled by massive star clusters★

Astronomy & Astrophysics
The recent discovery of five massive stellar clusters at z = 9.625 in the Cosmic Gems galaxy has raised the question about the formation mechanism of star clusters in the first 500 Myr after the Big Bang. We inferred the total stellar mass in clusters by
Vanzella E., Messa M., Adamo A., Loiacono F., Oguri M., Sharon K., Bradley L. D., Bergamini P., Meneghetti M., Claeyssens A., Welch B., Bradač M., Zanella A., Bolamperti A., Calura F., Hsiao T. Y.-Y., Zackrisson E., Ricotti M., Christensen L., Diego J. M., Bauer F. E., Xu X., Fujimoto S., Grillo C., Lombardi M., Rosati P., Resseguier T., Zitrin A., Bik A., Richard J., Abdurro’uf, Bhatawdekar R., Coe D., Frye B., Inoue A. K., Jimenez-Teja Y., Norman C., Rigby J. R., Trenti M., Hashimoto T.   +39 more
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

An Early Dark Matter–dominated Phase in the Assembly History of Milky Way–mass Galaxies Suggested by the TNG50 Simulation and JWST Observations

The Astrophysical Journal Letters
Whereas well-studied galaxies at cosmic noon are found to be baryon dominated within the effective radius, recent JWST observations of z ∼ 6–7 galaxies with stellar masses of only M _* ∼ 10 ^8−9 M _⊙ surprisingly indicate that they are dark matter ...
Anna de Graaff, Annalisa Pillepich, Hans-Walter Rix   +2 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