Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Oscar Agertz"'
Autor:
Santi Roca-Fàbrega, Ji-hoon Kim, Joel R. Primack, Minyong Jung, Anna Genina, Loic Hausammann, Hyeonyong Kim, Alessandro Lupi, Kentaro Nagamine, Johnny W. Powell, Yves Revaz, Ikkoh Shimizu, Clayton Strawn, Héctor Velázquez, Tom Abel, Daniel Ceverino, Bili Dong, Thomas R. Quinn, Eun-jin Shin, Alvaro Segovia-Otero, Oscar Agertz, Kirk S. S. Barrow, Corentin Cadiou, Avishai Dekel, Cameron Hummels, Boon Kiat Oh, Romain Teyssier, The AGORA Collaboration
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 125 (2024)
In this fourth paper from the AGORA Collaboration, we study the evolution down to redshift z = 2 and below of a set of cosmological zoom-in simulations of a Milky Way mass galaxy by eight of the leading hydrodynamic simulation codes. We also compare
Externí odkaz:
https://doaj.org/article/2e77e568bc9c4dc7b124e20e3b476a68
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 86 (2024)
Recent observations of high-redshift galaxies ( z ≲ 7) reveal that a substantial fraction have turbulent, gas-rich disks with well-ordered rotation and elevated levels of star formation. In some instances, disks show evidence of spiral arms, with b
Externí odkaz:
https://doaj.org/article/fdffd3711dc34fa5a3ae0ea9b5cbe027
Autor:
Govind Nandakumar, Nils Ryde, Gregory Mace, Kyle F. Kaplan, Niels Nieuwmunster, Daniel Jaffe, R. Michael Rich, Mathias Schultheis, Oscar Agertz, Eric Andersson, Christopher Sneden, Emily Strickland, Brian Thorsbro
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 96 (2024)
We report the first high-resolution, detailed abundances of 21 elements for giants in the Galactic bulge/bar within 1° of the Galactic plane, where high extinction has rendered such studies challenging. Our high-signal-to-noise-ratio and high-resolu
Externí odkaz:
https://doaj.org/article/bf5f45303b7749b9adcb30db679f884c
Publikováno v:
The Astrophysical Journal, Vol 947, Iss 2, p 80 (2023)
Recent observations of high-redshift galactic disks ( z ≈ 1–3) show a strong negative trend in the dark-matter (DM) fraction f _DM with increasing baryon surface density. For this to be true, the inner baryons must dominate over DM in early massi
Externí odkaz:
https://doaj.org/article/be5e826b6002486c8843e72401e96e58
Autor:
Martin P Rey, Oscar Agertz, Tjitske K Starkenburg, Florent Renaud, Gandhali D Joshi, Andrew Pontzen, Nicolas F Martin, Diane K Feuillet, Justin I Read
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 521:995-1012
We present a new suite of cosmological zoom-in hydrodynamical ($\approx 20\, \mathrm{pc}$ spatial resolution) simulations of Milky-Way mass galaxies to study how a varying mass ratio for a Gaia-Sausage-Enceladus (GSE) progenitor impacts the $z=0$ che
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1026b29c5ea2e61e0c241c42de0176b8
https://doi.org/10.1093/mnras/stad513
https://doi.org/10.1093/mnras/stad513
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 516:4922-4931
The correspondence between galaxy major mergers and starburst activity is well-established observationally and in simulations of low redshift galaxies. However, the evolution of the properties of interactions and of the galaxies involved suggests tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7fb92b98eeeade2bf35eea5c0d1182e
https://doi.org/10.1093/mnras/stac2557
https://doi.org/10.1093/mnras/stac2557
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 508:352-370
The morphology of gas-rich disc galaxies at redshift ~1-3 is dominated by a few massive clumps. The process of formation or assembly of these clumps and their relation to molecular clouds in contemporary spiral galaxies are still unknown. Using simul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::579ec03bced4d658c73ab25d72a99bd7
https://doi.org/10.1093/mnras/stab2604
https://doi.org/10.1093/mnras/stab2604
From starburst to quenching: merger-driven evolution of the star formation regimes in a shell galaxy
Shell galaxies make a class of tidally distorted galaxies, characterised by wide concentric arc(s), extending out to large galactocentric distances with sharp outer edges. Recent observations of young massive star clusters in the prominent outer shel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2c4ed7dbcae8402dfb867af62299ba9
http://arxiv.org/abs/2210.16333
http://arxiv.org/abs/2210.16333
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 502:L29-L34
In the outskirts of nearby spiral galaxies, star formation is observed in extremely low gas surface densities. Star formation in these regions, where the interstellar medium is dominated by diffuse atomic hydrogen, is difficult to explain with classi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6710284a607262cda022227aba5fa289
https://doi.org/10.1093/mnrasl/slaa201
https://doi.org/10.1093/mnrasl/slaa201
The specific angular momenta ($j\equiv J/M$) of stars ($j_{\star}$), gas ($j_{\mathrm{gas}}$), baryons as a whole ($j_{\mathrm{b}}$) and dark matter haloes ($j_{\mathrm{h}}$) contain clues of vital importance about how galaxies form and evolve. Using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6f4335cd090d90cd081046557e39501
http://arxiv.org/abs/2204.02695
http://arxiv.org/abs/2204.02695