Results 41 to 50 of about 916 (166)

Triples as Links between Binary Black Hole Mergers, Their Electromagnetic Counterparts, and Galactic Black Holes

The Astrophysical Journal Letters
We propose a formation pathway linking black holes (BHs) observed in gravitational-wave (GW) mergers, wide BH–stellar systems uncovered by Gaia, and accreting low-mass X-ray binaries (LMXBs).
Smadar Naoz, Zoltán Haiman, Eliot Quataert, Liz Holzknecht   +3 more
doaj   +1 more source

MOSEL Survey: JWST Reveals Major Mergers/strong Interactions Drive the Extreme Emission Lines in the Early Universe

The Astrophysical Journal Letters, 2023
Extreme emission line galaxies (EELGs), where nebular emissions contribute 30%–40% of the flux in certain photometric bands, are ubiquitous in the early Universe ( z > 6).
Anshu Gupta, Ravi Jaiswar, Vicente Rodriguez-Gomez, Ben Forrest, Kim-Vy Tran, Themiya Nanayakkara, Anishya Harshan, Elisabete da Cunha, Glenn G. Kacprzak, Michaela Hirschmann   +9 more
doaj   +1 more source

On the Formation of GW231123 in Population III Star Clusters

The Astrophysical Journal Letters
GW231123 is a binary black hole (BBH) merger whose primary component lies within or above the pair-instability mass gap, while the secondary component falls within this gap.
Shuai Liu, Long Wang, Ataru Tanikawa, Weiwei Wu, Michiko S. Fujii   +4 more
doaj   +1 more source

Overmassive Supermassive Black Holes in SDSS Close Galaxy Pairs

The Astrophysical Journal
Supermassive black holes (SMBHs) and their host galaxies coevolve through channels such as hierarchical merging and active galactic nuclei (AGN) feedback, establishing tight scaling relations between SMBH masses and the properties of the host galaxies ...
Maggie C. Huber, Julia M. Comerford, Joseph Simon   +2 more
doaj   +1 more source

The major merger–active galactic nucleus connection up to cosmic noon

Astronomy & Astrophysics
Galaxy major mergers are a potential mechanism for triggering active galactic nuclei (AGN) activity, but their role remains debated, particularly beyond the local Universe.
La Marca A., Margalef-Bentabol B., Wang L., Trager S. C., Rodriguez-Gomez V., Martin G.   +5 more
doaj   +1 more source

The Role of Cluster Environments in Quiescent Galaxy Stellar Halo Assembly

The Astrophysical Journal
External interactions drive galaxy stellar mass growth and morphological evolution. As stellar halos—assembled largely via hierarchical accretion—preserve signatures of these processes, their growth probes how environment regulates galaxy evolution.
Devin J. Williams, Ivana Damjanov, Marcin Sawicki, Harrison Souchereau, Lingjian Chen, Guillaume Desprez, Angelo George, Stephen Gwyn, Stéphane Arnouts   +8 more
doaj   +1 more source

Bulgeless Evolution And the Rise of Discs (BEARD)

Astronomy & Astrophysics
We study the formation and evolution of bulgeless galaxies within the Milky Way-Andromeda analogue sample of the TNG50 simulation. Through kinematic decomposition with MORDOR, we identified bulgeless galaxies with a bulge-to-disc mass ratio of B/D ≤ 0.08,
Rosas-Guevara Yetli, Méndez-Abreu Jairo, de Lorenzo-Cáceres Adriana, Cardona-Barrero Salvador, Arjona-Gálvez Elena, Chamorro Cazorla Mario, Corsini Enrico Maria, Costantin Luca, Cuomo Virginia, Di Cintio Arianna, Fernandez David, Gasparri Daniele, Marrero-de la Rosa Carlos, Mayya Divakara, Morelli Lorenzo, Muñoz-Tuñón Casiana, Pinna Francesca, Pizzella Alessandro, Román Javier, Rosa Gonzalez Daniel, Sánchez-Janssen Rubén, Vega Olga, Zarattini Stefano   +22 more
doaj   +1 more source

Resolved Mass Assembly and Star Formation in Milky Way Progenitors since z = 5 from JWST/CANUCS: From Clumps and Mergers to Well-ordered Disks

The Astrophysical Journal
We present a resolved study of 877 progenitors of Milky Way Analogs (MWAs) at 0.3 
Vivian Yun Yan Tan, Adam Muzzin, Ghassan T. E. Sarrouh, Jacqueline Antwi-Danso, Visal Sok, Naadiyah Jagga, Gregor Rihtaršič, Westley Brown, Roberto Abraham, Yoshihisa Asada, Guillaume Desprez, Kartheik Iyer, Nicholas S. Martis, Rosa M. Mérida, Lamiya A. Mowla, Gaël Noirot, Kiyoaki Christopher Omori, Marcin Sawicki, Roberta Tripodi, Chris J. Willott   +19 more
doaj   +1 more source

The Mass Density of Merging Binary Black Holes over Cosmic Time

The Astrophysical Journal
The connection between the binary black hole (BBH) mergers observed by LIGO-Virgo-KAGRA and their stellar progenitors remains uncertain. Specifically, the fraction ϵ of stellar mass that ends up in BBH mergers and the delay time τ between star formation ...
Aryanna Schiebelbein-Zwack, Maya Fishbach   +1 more
doaj   +1 more source

Theory, Simulations, and Observations of Stellar Mergers

Annual Review of Astronomy and Astrophysics
Stellar mergers are responsible for a great variety of astrophysical phenomena. They form blue straggler stars, give rise to spectacular transients, and produce some of the most massive stars in the Universe. Here, we focus on mergers from binary evolution and stellar collisions but do not cover mergers involving compact objects ...
openaire   +2 more sources