Results 51 to 60 of about 337,928 (232)

ANGULAR MOMENTUM OF DWARF GALAXIES [PDF]

The Astrophysical Journal Letters, 2016
ABSTRACT We present measurements of baryonic mass and specific angular momentum (sAM) in 14 rotating dwarf Irregular (dIrr) galaxies from the LITTLE THINGS sample.
Kirsty M. Butler, Danail Obreschkow, Se-Heon Oh   +2 more
openaire   +2 more sources

Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies [PDF]

, 2016
We present the first joint analysis of gamma-ray data from the MAGIC Cherenkov telescopes and the Fermi Large Area Telescope (LAT) to search for gamma-ray signals from dark matter annihilation in dwarf satellite galaxies.
M. L. Ahnen, S. Ansoldi, L. A. Antonelli, P. Antoranz, A. Babić, B. Banerjee, P. Bangale, U. D. Almeida, J. Barrio, J. Gonz'alez, W. Bednarek, E. Bernardini, B. Biasuzzi, A. Biland, O. Blanch, S. Bonnefoy, G. Bonnoli, F. Borracci, T. Bretz, E. Carmona, A. Carosi, A. Chatterjee, R. Clavero, P. Colin, E. Colombo, J. Contreras, J. Cortina, S. Covino, P. D. Vela, F. Dazzi, A. Angelis, B. Lotto, E. O. Wilhelmi, C. Mendez, F. Pierro, D., D. Prester, D. Dorner, M. Doro, S. Einecke, D. Glawion, D. Elsaesser, A. Fern'andez-Barral, D. Fidalgo, M. V. Fonseca, L. Font, K. Frantzen, C. Fruck, D. Galindo, R. L'opez, M. Garczarczyk, D. G. Terrats, M. Gaug, P. Giammaria, N. Godinovi'c, A. G. Muñoz, D. Guberman, A. Hahn, Y. Hanabata, M. Hayashida, J. Herrera, J. Hose, D. Hrupec, G. Hughes, W. Idec, K. Kodani, Y. Konno, H. Kubo, J. Kushida, A. Barbera, D. Lelas, E. Lindfors, S. Lombardi, F. Longo, M. L'opez, R. L'opez-Coto, A. L'opez-Oramas, E. Lorenz, P. Majumdar, M. Makariev, K. Mallot, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, B. Marcote, M. Mariotti, M. Mart'inez, D. Mazin, U. Menzel, J. Miranda, R. Mirzoyan, A. Moralejo, E. Moretti, D. Nakajima, V. Neustroev, A. Niedźwiecki, M. Rosillo, K. Nilsson, K. Nishijima, K. Noda, R. Orito, A. Overkemping, S. Paiano, J. Palacio, M. Palatiello, D. Paneque, R. Paoletti, J. Paredes, X. Paredes-Fortuny, M. Persic, J. Poutanen, P. Moroni, E. Prandini, I. Puljak, W. Rhode, M. Rib'o, J. Rico, J. Garcia, T. Saito, K. Satalecka, C. Schultz, T. Schweizer, S. Shore, A. Sillanpaa, J. Sitarek, I. Šnidarić, D. Sobczynska, A. Stamerra, T. Steinbring, M. Strzys, L. Takalo, H. Takami, F. Tavecchio, P. Temnikov, T. Terzi'c, D. Tescaro, M. Teshima, J. Thaele, D. Torres, T. Toyama, A. Treves, V. Verguilov, I. Vovk, J. Ward, M. Will, M. H. Wu, R. Zanin, J. Aleksi'c, M. Wood, B. Anderson, E. Bloom, J. Cohen-Tanugi, A. Drlica-Wagner, M. Mazziotta, M. S'anchez-Conde, L. Strigari   +156 more
semanticscholar   +1 more source

Dynamics of Dwarf Galaxies Disfavor Stellar-Mass Black Holes as Dark Matter. [PDF]

Physical Review Letters, 2017
We study the effects of black hole dark matter on the dynamical evolution of stars in dwarf galaxies. We find that mass segregation leads to a depletion of stars in the center of dwarf galaxies and the appearance of a ring in the projected stellar ...
S. Koushiappas, A. Loeb
semanticscholar   +1 more source

RECONCILING DWARF GALAXIES WITH ΛCDM COSMOLOGY: SIMULATING A REALISTIC POPULATION OF SATELLITES AROUND A MILKY WAY–MASS GALAXY [PDF]

, 2016
Low-mass “dwarf” galaxies represent the most significant challenges to the cold dark matter (CDM) model of cosmological structure formation. Because these faint galaxies are (best) observed within the Local Group (LG) of the Milky Way (MW) and Andromeda (
A. Wetzel, P. Hopkins, Ji-hoon Kim, C. Faucher-Giguére, D. Keres̆, E. Quataert   +5 more
semanticscholar   +1 more source

Evolution of Terrestrial Planetary Bodies and Implications for Habitability

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract The terrestrial planetary bodies of our solar system—Mercury, Venus, Earth, and Mars—share a common origin through nebular accretion and early magma ocean differentiation, yet they diverged significantly in geological evolution, tectonic regimes, and habitability.
Peter A. Cawood, Eva E. Stüeken, Priyadarshi Chowdhury, Chris J. Hawkesworth, Jacob A. Mulder   +4 more
wiley   +1 more source

CONSTRAINTS ON MACHO DARK MATTER FROM COMPACT STELLAR SYSTEMS IN ULTRA-FAINT DWARF GALAXIES [PDF]

, 2016
I show that a recently discovered star cluster near the center of the ultra-faint dwarf galaxy Eridanus II provides strong constraints on massive compact halo objects (MACHOs) of ≳5 M⊙ as the main component of dark matter.
Timothy D. Brandt
semanticscholar   +1 more source

Dust in Nearby DWARF Galaxies [PDF]

Symposium - International Astronomical Union, 1994
The aim of the present paper is to look for the gas-to-dust ratio in different types of galaxies and for a correlation between this ratio and the metallicity in dwarf galaxies. The recent compilation of data on nearby galaxies by Schmidt & Boller (1992, hereinafter SB) including HI and dust ...
K.-H. Schmidt, T. Boller
openaire   +1 more source

Visionaries and Crackpots, Maniacs and Saints: Existential Risk and the Politics of Longtermism

Ratio, Volume 38, Issue 4, Page 268-278, December 2025.
ABSTRACT Despite advancing strong claims about our collective priorities, longtermism has received little attention in debates in political philosophy. I first provide an account of longtermism that highlights the way it departs from established work on intergenerational justice.
Alex McLaughlin
wiley   +1 more source

Dark Matter Limits from Dwarf Spheroidal Galaxies with the HAWC Gamma-Ray Observatory [PDF]

, 2017
The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field of view observatory sensitive to 500 GeV–100 TeV gamma-rays and cosmic rays. It can also perform diverse indirect searches for dark matter annihilation and decay.
A. Albert, R. Alfaro, C. Alvarez, J. Álvarez, R. Arceo, J. C. Arteaga-Vel'azquez, D. Rojas, H. Solares, N. Bautista-Elivar, A. Becerril, E. Belmont-Moreno, S. Benzvi, A. Bernal, J. Braun, C. Brisbois, K. Caballero-Mora, T. Capistr'an, A. Carramiñana, S. Casanova, M. Castillo, U. Cotti, J. Cotzomi, S. León, C. D. Le'on, E. D. L. Fuente, R. Hernández, B. Dingus, M. DuVernois, J. C. Díaz-Vélez, R. Ellsworth, K. Engel, D. Fiorino, N. Fraija, J. A. Garc'ia-Gonz'alez, F. Garfias, M. Gonz'alez, J. Goodman, Z. Hampel-Arias, J. P. Harding, S. Hernández, A. Hernández-Almada, B. Hona, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, S. Kaufmann, D. Kieda, R. Lauer, D. Lennarz, H. L. Vargas, J. Linnemann, A. Longinotti, M. Proper, G. Raya, R. Luna-García, R. L'opez-Coto, K. Malone, S. Marinelli, I. Martinez-Castellanos, J. Mart'inez-Castro, H. Mart'inez-Huerta, J. Matthews, P. Miranda-Romagnoli, E. Moreno, M. Mostafá, L. Nellen, M. Newbold, M. Nisa, R. Noriega-Papaqui, R. Pelayo, J. Pretz, E. G. P'erez-P'erez, Z. Ren, C. Rho, C. Rivière, D. Rosa-González, M. Rosenberg, E. Ruiz-Velasco, F. Greus, A. Sandoval, M. Schneider, H. Schoorlemmer, G. Sinnis, A. Smith, R. Springer, P. Surajbali, I. Taboada, O. Tibolla, K. Tollefson, I. Torres, G. Vianello, T. Weisgarber, S. Westerhoff, J. Wood, T. Yapici, P. Younk, H. Zhou   +97 more
semanticscholar   +1 more source

New Arabic Records From Cairo on Supernovae 1181 and 1006

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer, H. Halm, R. Neuhäuser, D. L. Neuhäuser   +3 more
wiley   +1 more source