Results 91 to 100 of about 399,477 (315)

Gas heating from spinning and non-spinning evaporating primordial black holes

Physics Letters B, 2021
Primordial black holes (PBHs) from the early Universe constitute a viable dark matter (DM) candidate and can span many orders of magnitude in mass. Light PBHs with masses around 1015 g contribute to DM and will efficiently evaporate through Hawking ...
Ranjan Laha, Philip Lu, Volodymyr Takhistov   +2 more
doaj   +1 more source

STELLAR KINEMATICS AND METALLICITIES IN THE ULTRA-FAINT DWARF GALAXY RETICULUM II [PDF]

, 2015
We present Magellan/M2FS, Very Large Telescope/GIRAFFE, and Gemini South/GMOS spectroscopy of the newly discovered Milky Way satellite Reticulum II. Based on the spectra of 25 Ret II member stars selected from Dark Energy Survey imaging, we measure a ...
J. Simon, A. Drlica-Wagner, Ting S. Li, B. Nord, M. Geha, K. Bechtol, E. Balbinot, E. Buckley-Geer, Huan Lin, J. Marshall, B. Santiago, L. Strigari, Mei-Yu Wang, Risa Wechsler, Risa Wechsler, B. Yanny, T. Abbott, A. Bauer, Gary Bernstein, E. Bertin, D. Brooks, D. Burke, D. Burke, D. Capozzi, A. Rosell, M. Kind, M. Kind, C. D'Andrea, L. Costa, D. DePoy, S. Desai, H. Diehl, S. Dodelson, S. Dodelson, C. Cunha, J. Estrada, A. Evrard, A. F. Neto, E. Fernandez, D. Finley, B. Flaugher, J. Frieman, J. Frieman, E. Gaztañaga, D. Gerdes, D. Gruen, R. Gruendl, R. Gruendl, K. Honscheid, D. James, S. Kent, K. Kuehn, N. Kuropatkin, O. Lahav, M. Maia, M. March, P. Martini, C. Miller, R. Miquel, R. Ogando, A. Romer, A. Roodman, A. Roodman, E. Rykoff, E. Rykoff, M. Sako, E. Sánchez, M. Schubnell, I. Sevilla, R. C. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M. Swanson, G. Tarlé, J. Thaler, D. Tucker, V. Vikram, A. Walker, W. Wester   +79 more
semanticscholar   +1 more source

On the origin of the stellar halo and multiple stellar populations in the globular cluster NGC 1851

, 2011
We propose that the observed stellar halo around the globular cluster (GC) NGC 1851 is evidence for its formation in the central region of its defunct host dwarf galaxy.
Anderson, Bedin, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bellazzini, Burkert, Capuzzo-Dolcetta, Capuzzo-Dolcetta, Carballo-Bello, Carraro, Carraro, Carretta, Carretta, Cohen, Cohen, Correnti, Crnojević, Côté, Da Costa, David Yong, Dinescu, Dinescu, D’Ercole, Forbes, Freeman, Freeman, Freeman, Georgiev, Goerdt, Governato, Gratton, Han, Harris, Hernquist, Johnson, Kauffmann, Kenji Bekki, Kraft, Küpper, Lee, Lokas, Mackey, Marino, Marino, Milone, Milone, Miyamoto, Navarro, Norris, Oh, Olszewski, Pflamm-Altenburg, Piotto, Renzini, Salaris, Salucci, Smith, Smith, Sugimoto, Ventura, Villanova, Wetzel, Yong, Yong   +69 more
core   +1 more source

Photoionization and the formation of dwarf galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 1996
compressed postscript, 5 pages including 4 embedded figures.
Neal Katz, George Efstathiou, Thomas R. Quinn   +2 more
openaire   +3 more sources

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

Ratio, EarlyView.
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

The Andromeda Galaxy and Its Star Formation History

Universe, 2023
The state of knowledge of the properties of the Andromeda Galaxy (also known as M31) is reviewed. The spatial structure of the Andromeda Galaxy, its main source populations, and the properties of its gas and dust are discussed.
Denis Leahy
doaj   +1 more source

Dense cloud cores revealed by CO in the low metallicity dwarf galaxy WLM [PDF]

Nature, 2015
Understanding stellar birth requires observations of the clouds in which they form. These clouds are dense and self-gravitating, and in all existing observations they are molecular, with H2 the dominant species and carbon monoxide (CO) the best available
M. Rubio, B. Elmegreen, D. Hunter, E. Brinks, J. Cortés, P. Cigan   +5 more
semanticscholar   +1 more source

Tools for Learning—Promoting Reflection for Student Teachers' Development of PCK

Journal of Research in Science Teaching, Volume 62, Issue 8, Page 1902-1922, October 2025.
ABSTRACT This paper investigates how the coherent integration of three different tools for reflection during a science methods course can contribute to student teachers' planning and enactment of science teaching, that is, their development of pedagogical content knowledge (PCK).
Pernilla Nilsson, Anne‐Marie Cederqvist   +1 more
wiley   +1 more source

HYDRA II: A FAINT AND COMPACT MILKY WAY DWARF GALAXY FOUND IN THE SURVEY OF THE MAGELLANIC STELLAR HISTORY [PDF]

, 2015
We present the discovery of a new dwarf galaxy, Hydra II, found serendipitously within the data from the ongoing Survey of the Magellanic Stellar History conducted with the Dark Energy Camera on the Blanco 4 m Telescope.
N. Martin, N. Martin, D. Nidever, G. Besla, K. Olsen, A. Walker, A. K. Vivas, R. Gruendl, C. Kaleida, R. Muñoz, R. Blum, A. Saha, B. Conn, E. Bell, Y. Chu, Y. Chu, M. Cioni, T. D. Boer, C. Gallart, C. Gallart, Shoko Jin, A. Kunder, S. Majewski, D. Martínez-Delgado, A. Monachesi, M. Monelli, M. Monelli, Lara Monteagudo, Lara Monteagudo, N. Noël, E. Olszewski, G. Stringfellow, R. V. D. Marel, D. Zaritsky   +33 more
semanticscholar   +1 more source

The post-infall evolution of a satellite galaxy

, 2015
As galaxy simulations increase in resolution more attention is being paid towards the evolution of dwarf galaxies and how the simulations compare to observations. Despite this increasing resolution we are however, far away from resolving the interactions
Jablonka, Pascale, Nichols, Matthew, Revaz, Yves   +2 more
core   +2 more sources