Results 71 to 80 of about 11,151 (256)

Tidal stripping as a mechanism for placing globular clusters on wide orbits: the case of MGC1 in M31

, 2019
The globular clusters of large spiral galaxies can be divided into two populations: one which formed in-situ and one which comprises clusters tidally stripped away from other galaxies.
Andersson, Eric P., Davies, Melvyn B.
core   +1 more source

Causal theories of spacetime

Noûs, Volume 58, Issue 1, Page 202-224, March 2024.
Abstract We develop a new version of the causal theory of spacetime. Whereas traditional versions of the theory seek to identify spatiotemporal relations with causal relations, the version we develop takes causal relations to be the grounds for spatiotemporal relations. Causation is thus distinct from, and more basic than, spacetime. We argue that this
Sam Baron, Baptiste Le Bihan
wiley   +1 more source

Dark matter halos and the anisotropy of ultra-high energy cosmic rays [PDF]

, 1999
Several explanations for the existence of Ultra High Energy Cosmic Rays invoke the idea that they originate from the decay of massive particles created in the reheating following inflation.
A.A. Watson, Afanasiev, Beck, Benakli, Benson, Berezinsky, Berezinsky, Berezinsky, Binney, Bird, Bird, Bird, Birkel, Caldwell, Chi, Coleman, Ding, Dubinski, Dubinski, Dubovsky, Efimov, Farrar, Fisher, Frenk, G.A. Medina Tanco, Greisen, Hayashida, Hillas, Hillas, Hillas, Hoffman, Katz, Katz, Kephart, Kravtsov, Kronberg, Lawrence, Linsley, Linsley, Linsley, Medina Tanco, Medina Tanco, Medina Tanco, Medina Tanco, Navarro, Reid, Sciama, Stanev, Stanev, Takeda, Takeda, Uchihori, Vallée, van der Marel, Warren, Watson, Watson, Winn, Zatsepin   +58 more
core   +2 more sources

Investigating variations in the dust emissivity index in the Andromeda Galaxy [PDF]

, 2021
Gayathri Athikkat-Eknath, S. Eales, M. W. L. Smith, Andreas Schruba, K. A. Marsh, A. P. Whitworth   +5 more
openalex   +1 more source

Molecular gas in the Andromeda galaxy [PDF]

Astronomy & Astrophysics, 2006
We present a new 12CO(J=1-0)-line survey of the Andromeda galaxy, M31, covering the bright disk with the highest resolution to date (85 pc along the major axis), observed On-the-Fly (in italics) with the IRAM 30-m telescope. We discuss the distribution of the CO emission and compare it with the distributions of HI and emission from cold dust traced at ...
Nieten, Ch., Neininger, N., Guelin, M., Ungerechts, H., Lucas, R., Berkhuijsen, E. M., Beck, R., Wielebinski, R.   +7 more
openaire   +2 more sources

Reflecting on Our Present Self‐Awareness of Not Having Found Any Life Beyond Earth

Earth and Space Science, Volume 11, Issue 1, January 2024.
Abstract Ever gazed at the stars and wondered if we’re alone? Scientists have been on a quest to find life beyond Earth, but no aliens yet. It’s tough because space is huge, and potential life is incredibly far away, making it difficult to detect their signals. Despite this, our ability to search is improving.
Stuart F. Taylor, Jonathan H. Jiang, Nick Searra, Philip E. Rosen   +3 more
wiley   +1 more source

Exploring the Structures and Substructures of the Andromeda Satellite Dwarf Galaxies Cassiopeia III, Perseus I, and Lacerta I

The Astronomical Journal, 2023
We present results from wide-field imaging of the resolved stellar populations of the dwarf spheroidal galaxies Cassiopeia III (And XXXII) and Perseus I (And XXXIII), two satellites in the outer stellar halo of the Andromeda galaxy (M31).
Katherine L. Rhode, Nicholas J. Smith, Denija Crnojevic, David J. Sand, Ryan A. Lambert, Enrico Vesperini, Madison V. Smith, Steven Janowiecki, John J. Salzer, Ananthan Karunakaran, Kristine Spekkens   +10 more
doaj   +1 more source

Tracing Galaxy Formation with Stellar Halos II: Relating Substructure in Phase- and Abundance-Space to Accretion Histories [PDF]

, 2008
This paper explores the mapping between the observable properties of a stellar halo in phase- and abundance-space and the parent galaxy's accretion history in terms of the characteristic epoch of accretion and mass and orbits of progenitor objects.
Andreea Font, Brant E. Robertson, Fardal M. A., Geehan J. J., Helmi A., James S. Bullock, Kathryn V. Johnston, Knebe A., Renda A., Samuel N. Leitner, Sanjib Sharma   +10 more
core   +2 more sources

Weighing the Milky Way and Andromeda galaxies with artificial intelligence [PDF]

, 2023
Pablo Villanueva-Domingo, Francisco Villaescusa-Navarro, Shy Genel, Daniel Anglés‐Alcázar, Lars Hernquist, Federico Marinacci, David N. Spergel, Mark Vogelsberger, Desika Narayanan   +8 more
openalex   +1 more source

Dust around Massive Stars Is Agnostic to Galactic Environment: New Insights from PHAT/BEAST

The Astrophysical Journal
Resolving the environments of massive stars is crucial for understanding their formation mechanisms and their impact on galaxy evolution. An important open question is whether massive stars found in diffuse regions outside spiral arms formed in situ or ...
Christina Willecke Lindberg, Claire E. Murray, Julianne J. Dalcanton, J. E. G. Peek, Karl D. Gordon   +4 more
doaj   +1 more source