Results 81 to 90 of about 52,093 (177)

Can past gamma-ray bursts explain both INTEGRAL and ATIC/PAMELA/Fermi anomalies simultaneously?

, 2010
Gamma-ray bursts (GRBs) have been invoked to explain both the 511 keV emission from the galactic bulge and the high-energy positron excess inferred from the ATIC, PAMELA, and Fermi data.
Alexander Kusenko, Antoine Calvez, G. Cavallo, J. Binney, K. Z. Stanek, R. Ortiz   +5 more
core   +1 more source

Sgr A* Spin and Mass Estimates through the Detection of Multiple Extremely Large Mass Ratio Inspirals

The Astrophysical Journal
We analyze the parameter estimation accuracy that can be achieved for the mass and spin of Sgr A*, the supermassive black hole in our Galactic center, by detecting multiple extremely large mass ratio inspirals (XMRIs).
Verónica Vázquez-Aceves, Yiren Lin, Alejandro Torres-Orjuela   +2 more
doaj   +1 more source

The DREAMS Project: Disentangling the Impact of Halo-to-halo Variance and Baryonic Feedback on Milky Way Dark Matter Density Profiles

The Astrophysical Journal
In this work, we utilize a new suite of Milky Way–mass halos from the DREAMS Project, simulated with cold dark matter (CDM), to quantify the influence of baryon feedback and intrinsic halo-to-halo variance on dark matter density profiles.
Alex M. Garcia, Jonah C. Rose, Paul Torrey, Andrea Caputo, Mariangela Lisanti, Andrew B. Pace, Hongwan Liu, Abdelaziz Hussein, Haozhe Liu, Francisco Villaescusa-Navarro, John Barry, Ilem Leisher, Belén Costanza, Jonathan Kho, Ethan Lilie, Jiaxuan Li, Niusha Ahvazi, Aklant Bhowmick, Tri Nguyen, Stephanie O’Neil, Xiaowei Ou, Xuejian Shen, Arya Farahi, Nitya Kallivayalil, Lina Necib, Mark Vogelsberger   +25 more
doaj   +1 more source

Sensitivity Projections for Dark Matter Searches with the Fermi Large Area Telescope

, 2016
The nature of dark matter is a longstanding enigma of physics; it may consist of particles beyond the Standard Model that are still elusive to experiments. Among indirect search techniques, which look for stable products from the annihilation or decay of
Ajello, Marco, Albert, Andrea, Anderson, Brandon, Baldini, Luca, Bechtol, Keith, Bloom, Elliott, Caputo, Regina, Ceraudo, Francesco, Charles, Eric, Cohen-Tanugi, Johann, Cuoco, Alessandro, Di Mauro, Mattia, Digel, Seth, Drlica-Wagner, Alex, Gaskins, Jennifer, Gomez-Vargas, German, Gustafsson, Michael, Meyer, Manuel, Mirabal, Nestor, Razzano, Massimiliano, Sanchez-Conde, Miguel, Tibaldo, Luigi, Wood, Matthew, Zaharijas, Gabrijela, Zimmer, Stephan   +24 more
core   +3 more sources

Dissipative Dark Matter on FIRE. II. Observational Signatures and Constraints from Local Dwarf Galaxies

The Astrophysical Journal
We analyze the first cosmological baryonic zoom-in simulations of galaxies in dissipative self-interacting dark matter (dSIDM). The simulations utilize the FIRE-2 galaxy formation physics with the inclusion of dissipative dark matter self-interactions ...
Xuejian Shen, Philip F. Hopkins, Lina Necib, Fangzhou Jiang, Michael Boylan-Kolchin, Andrew Wetzel   +5 more
doaj   +1 more source

Solar and stellar photospheric abundances

Living Reviews in Solar Physics, 2016
The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical foundations.
Carlos Allende Prieto
doaj   +1 more source

Dissipationless Formation and Evolution of the Milky Way Nuclear Star Cluster

, 2012
Abridged: In one widely discussed model for the formation of nuclear star clusters (NSCs), massive globular clusters spiral into the center of a galaxy and merge to form the nucleus. It is now known that at least some NSCs coexist with supermassive black
Agarwal, Alessandra Mastrobuono-Battisti, Antonini, Bartko, Bekki, Böker, Carollo, Charbonnel, Côté, David Merritt, Do, Ebisuzaki, Emsellem, Fabio Antonini, Ferrarese, Figer, Figer, Gebhardt, Genzel, Ghez, Gillessen, Gualandris, Hashimoto, Haşegan, Ibata, Jordán, Lauer, Loose, Lotz, Makino, Matthews, Merritt, Merritt, Merritt, Meynet, Milosavljević, Miocchi, Murali, Ostriker, Pesce, Pfuhl, Poon, Portegies Zwart, Roberto Capuzzo-Dolcetta, Rosenberg, Saha, Schaerer, Schaerer, Schaller, Schinnerer, Schinnerer, Schödel, Schödel, Seth, Seth, Sjouwerman, Spitzer, Takahashi, Wehner, Zhao   +59 more
core   +1 more source

Discovery and Spectroscopic Confirmation of Aquarius III: A Low-mass Milky Way Satellite Galaxy

The Astrophysical Journal
We present the discovery of Aquarius III, an ultra-faint Milky Way satellite galaxy identified in the second data release of the DECam Local Volume Exploration survey.
W. Cerny, A. Chiti, M. Geha, B. Mutlu-Pakdil, A. Drlica-Wagner, C. Y. Tan, M. Adamów, A. B. Pace, J. D. Simon, D. J. Sand, A. P. Ji, T. S. Li, A. K. Vivas, E. F. Bell, J. L. Carlin, J. A. Carballo-Bello, A. Chaturvedi, Y. Choi, A. Doliva-Dolinsky, O. Y. Gnedin, G. Limberg, C. E. Martínez-Vázquez, S. Mau, G. E. Medina, M. Navabi, N. E. D. Noël, V. M. Placco, A. H. Riley, I. U. Roederer, G. S. Stringfellow, C. R. Bom, P. S. Ferguson, D. J. James, D. Martínez-Delgado, P. Massana, D. L. Nidever, J. D. Sakowska, L. Santana-Silva, N. F. Sherman, E. J. Tollerud, DELVE Collaboration   +40 more
doaj   +1 more source

Photometric Analysis of 30 Contact Binaries in M31

The Astrophysical Journal
M31, as the largest galaxy in the Local Group, is of significant importance for the study of stellar formation and evolution. Based on the data of 5859 targets observed in M31 by Gu et al., we selected 30 contact binaries by visual inspection for further
Xiang Gao, Kai Li, Li-Heng Wang, Hai-bo Yuan, Hong-rui Gu, Ya-Ni Guo   +5 more
doaj   +1 more source

Validating the CROCODILE Model Within the AGORA Galaxy Simulation Framework

Galaxies
Numerical galaxy formation simulations are sensitive to numerical methods and sub-grid physics models, making code comparison projects essential for quantifying uncertainties.
Pablo Granizo, Yuri Oku, Kentaro Nagamine   +2 more
doaj   +1 more source