Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Brian W. O'Shea"'
Autor:
Anna C. Wright, Jason Tumlinson, Molly S. Peeples, Brian W. O’Shea, Cassandra Lochhaas, Lauren Corlies, Britton D. Smith, Nguyen Binh, Ramona Augustin, Raymond C. Simons
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 70 (2024)
Over the next decade, the astronomical community will be commissioning multiple wide-field observatories well suited for studying stellar halos in both integrated light and resolved stars. In preparation for this, we use five high-resolution cosmolog
Externí odkaz:
https://doaj.org/article/54e03a67377c4634a28f5c11d6165905
Publikováno v:
The Astrophysical Journal Letters, Vol 942, Iss 2, p L34 (2023)
Magnetized turbulence is ubiquitous in many astrophysical and terrestrial plasmas but no universal theory exists. Even the detailed energy dynamics in magnetohydrodynamic (MHD) turbulence are still not well understood. We present a suite of subsonic,
Externí odkaz:
https://doaj.org/article/32d040b8e0184a7a95de66398e2b9b58
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 2, p 107 (2023)
Precipitation is potentially a mechanism through which the circumgalactic medium (CGM) can regulate a galaxy’s star formation. Here, we present idealized simulations of isolated Milky Way–like galaxies intended to examine the ability of galaxies
Externí odkaz:
https://doaj.org/article/9f309ea5398f4e16999daaa69292d9c9
Autor:
Cassandra Lochhaas, Jason Tumlinson, Molly S. Peeples, Brian W. O’Shea, Jessica K. Werk, Raymond C. Simons, James Juno, Claire Kopenhafer, Ramona Augustin, Anna C. Wright, Ayan Acharyya, Britton D. Smith
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 1, p 43 (2023)
The circumgalactic medium (CGM) is often assumed to exist in or near hydrostatic equilibrium, with the regulation of accretion and the effects of feedback treated as perturbations to a stable balance between gravity and thermal pressure. We investiga
Externí odkaz:
https://doaj.org/article/5a22a2fd66d0467086e75452785db3e4
Autor:
John A. Regan, John H. Wise, Tyrone E. Woods, Turlough P. Downes, Brian W. O'Shea, Michael C. Norman
Publikováno v:
The Open Journal of Astrophysics, Vol 3, Iss 1 (2020)
Externí odkaz:
https://doaj.org/article/4b311b4f09804d82be8507c0792341b5
Publikováno v:
The Open Journal of Astrophysics, Vol 3 (2020)
The formation of supermassive stars has generally been studied under the assumption of rapid accretion of pristine metal-free gas. Recently it was found, however, that gas enriched to metallicities up to Z + 10^-3 Solar can also facilitate supermassi
Externí odkaz:
https://doaj.org/article/96eaecfb6418477499e16491d77aa937
Autor:
Cassandra Lochhaas, Jason Tumlinson, Molly S. Peeples, Brian W. O’Shea, Jessica K. Werk, Raymond C. Simons, James Juno, Claire Kopenhafer, Ramona Augustin, Anna C. Wright, Ayan Acharyya, Britton D. Smith
The circumgalactic medium (CGM) is often assumed to exist in or near hydrostatic equilibrium with the regulation of accretion and the effects of feedback treated as perturbations to a stable balance between gravity and thermal pressure. We investigat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2e01749eb1590178940f0a422f3941d
http://arxiv.org/abs/2206.09925
http://arxiv.org/abs/2206.09925
Autor:
Nicolas Lehner, Claire Kopenhafer, John M. O’Meara, J. Christopher Howk, Michele Fumagalli, J. Xavier Prochaska, Ayan Acharyya, Brian W. O’Shea, Molly S. Peeples, Jason Tumlinson, Cameron B. Hummels
Publikováno v:
The Astrophysical Journal
We present the KODIAQ-Z survey aimed to characterize the cool, photoionized gas at 2.2100) between absorbers separated by less than 500 km/s imply that the metals are poorly mixed in 14.6
Comment: Submitted to the Astrophysical Journal. Comments
Comment: Submitted to the Astrophysical Journal. Comments
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 495:594-599
Recent observations show that the star formation rate (SFR) in the {\it Phoenix} cluster's central galaxy is $\sim 500$ M$_\odot$ yr$^{-1}$. Even though {\it Phoenix} is a massive cluster ($M_{200} \approx 2.0\times 10^{15}$ M$_\odot$; $z\approx 0.6$
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 492:3021-3031
Using the Renaissance suite of simulations we examine the emergence of pristine atomic cooling haloes that are both metal-free and star-free in the early Universe. The absence of metals prevents catastrophic cooling, suppresses fragmentation, and may