Results 21 to 30 of about 35,030 (307)

Manganese in dwarf spheroidal galaxies [PDF]

Astronomy & Astrophysics, 2012
We provide manganese abundances (corrected for the effect of the hyperfine structure) for a large number of stars in the dwarf spheroidal galaxies Sculptor and Fornax and for a smaller number in the Carina and Sextans dSph galaxies. Abundances had already been determined for a number of other elements in these galaxies including a and iron peak ones ...
North P., Cescutti G, Jablonka P.
openaire   +6 more sources

Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data. [PDF]

Physical Review Letters, 2015
The dwarf spheroidal satellite galaxies (dSphs) of the Milky Way are some of the most dark matter (DM) dominated objects known. We report on γ-ray observations of Milky Way dSphs based on six years of Fermi Large Area Telescope data processed with the ...
M. Ackermann, A. Albert, B. Anderson, W. Atwood, L. Baldini, G. Barbiellini, D. Bastieri, K. Bechtol, R. Bellazzini, E. Bissaldi, R. Blandford, E. Bloom, R. Bonino, E. Bottacini, T. Brandt, J. Bregeon, P. Bruel, R. Buehler, G. Caliandro, R. Cameron, R. Caputo, M. Caragiulo, P. Caraveo, C. Cecchi, E. Charles, A. Chekhtman, J. Chiang, G. Chiaro, S. Ciprini, R. Claus, J. Cohen-Tanugi, J. Conrad, A. Cuoco, S. Cutini, F. D’Ammando, A. De Angelis, F. de Palma, R. Desiante, S. Digel, L. Di Venere, P. Drell, A. Drlica-Wagner, R. Essig, C. Favuzzi, S. Fegan, E. Ferrara, W. Focke, A. Franckowiak, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, G. Gómez-Vargas, I. Grenier, S. Guiriec, M. Gustafsson, E. Hays, J. Hewitt, D. Horan, T. Jogler, G. Jóhannesson, M. Kuss, S. Larsson, L. Latronico, J. Li, L. Li, M. Llena Garde, F. Longo, F. Loparco, P. Lubrano, D. Malyshev, M. Mayer, M. Mazziotta, J. Mcenery, M. Meyer, P. Michelson, T. Mizuno, A. Moiseev, M. Monzani, A. Morselli, S. Murgia, É. Nuss, T. Ohsugi, M. Orienti, E. Orlando, J. Ormes, D. Paneque, J. Perkins, M. Pesce-Rollins, F. Piron, G. Pivato, T. Porter, S. Rainò, R. Rando, M. Razzano, A. Reimer, O. Reimer, S. Ritz, M. Sánchez-Conde, A. Schulz, N. Sehgal, C. Sgro’, E. Siskind, F. Spada, G. Spandre, P. Spinelli, L. Strigari, H. Tajima, H. Takahashi, J. Thayer, L. Tibaldo, D. Torres, E. Troja, G. Vianello, M. Werner, B. Winer, K. Wood, M. Wood, G. Zaharijas, S. Zimmer   +125 more
semanticscholar   +1 more source

1I/‘Oumuamua as an N2 Ice Fragment of an Exo‐Pluto Surface II: Generation of N2 Ice Fragments and the Origin of ‘Oumuamua

Journal of Geophysical Research: Planets, Volume 126, Issue 5, May 2021., 2021
Abstract The origin of the interstellar object 1I/‘Oumuamua has defied explanation. In a companion paper (Jackson & Desch, 2021), we show that a body of N2 ice with axes 45 m × 44 m × 7.5 m at the time of observation would be consistent with its albedo, nongravitational acceleration, and lack of observed CO or CO2 or dust.
S. J. Desch, A. P. Jackson
wiley   +1 more source

Searching for TeV Dark Matter in Irregular Dwarf Galaxies with HAWC Observatory

The Astrophysical Journal, 2023
We present the results of dark matter (DM) searches in a sample of 31 dwarf irregular (dIrr) galaxies within the field of view of the HAWC Observatory.
R. Alfaro, C. Alvarez, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, R. Babu, E. Belmont-Moreno, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, E. De la Fuente, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, M. Durocher, J. C. Díaz-Vélez, C. Espinoza, K. L. Fan, N. Fraija, J. A. García-González, F. Garfias, M. M. González, J. P. Harding, S. Hernández-Cadena, D. Huang, F. Hueyotl-Zahuantitla, A. Iriarte, V. Joshi, S. Kaufmann, D. Kieda, J. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, J. A. Matthews, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, N. Omodei, Y. Pérez Araujo, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, H. Salazar, D. Salazar-Gallegos, A. Sandoval, J. Serna-Franco, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, L. Villaseñor, X. Wang, E. Willox, H. Zhou, C. de León, The HAWC Collaboration, V. Gammaldi, E. Karukes, P. Salucci   +72 more
doaj   +1 more source

Orbital Evidences for Dark-matter-free Milky Way Dwarf Spheroidal Galaxies [PDF]

Astrophysical Journal, 2020
The nature of Milky Way dwarf spheroidals (MW dSphs) has been questioned, in particular whether they are dominated by dark matter (DM). Here we investigate an alternative scenario, for which tidal shocks are exerted by the MW to DM-free dSphs after a ...
F. Hammer, Yanbin Yang, Frédéric Arenou, Jianling Wang, Hefan Li, P. Bonifacio, C. Babusiaux   +6 more
semanticscholar   +1 more source

Mass Modelling of dwarf Spheroidal Galaxies [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractWe study the origin and properties of unbound stars in the kinematic samples of dwarf spheroidal galaxies. For this purpose we have run a high resolution N-body simulation of a two-component dwarf galaxy orbiting in a Milky Way potential. We create mock kinematic data sets by observing the dwarf in different directions.
Klimentowski, J, Łokas, E L, Kazantzidis, S, Prada, F, Mayer, L, Mamon, G A   +5 more
openaire   +3 more sources

Kinematic subpopulations in dwarf spheroidal galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2010
Submitted to ...
Ural, Uğur, Wilkinson, Mark I., Koch, Andreas, Gilmore, Gerard, Beers, Timothy C., Belokurov, V., Wyn Evans, N., Grebel, E.K., Vidrih, Simon, Zucker, D. B.   +9 more
openaire   +3 more sources

Dwarfs in Void Environments (DIVE): The Stellar Kinematics of Void Dwarf Galaxies Using the Keck Cosmic Web Imager

The Astrophysical Journal, 2023
Dwarf galaxies located in extremely underdense cosmic voids are excellent test beds for disentangling the effects of large-scale environments on galaxy formation and evolution. We present the first results of the Dwarfs in Void Environments Survey, which
Mithi A. C. de los Reyes, Evan N. Kirby, Zhuyun Zhuang, Charles C. Steidel, Yuguang Chen, Coral Wheeler   +5 more
doaj   +1 more source

New Type Ia Supernova Yields and the Manganese and Nickel Problems in the Milky Way and Dwarf Spheroidal Galaxies [PDF]

Astrophysical Journal, 2019
In our quest to identify the progenitors of Type Ia supernovae (SNe Ia), we first update the nucleosynthesis yields for both near-Chandrasekhar- (Ch) and sub-Ch-mass white dwarfs (WDs) for a wide range of metallicities with our 2D hydrodynamical code and
C. Kobayashi, S. Leung, K. Nomoto
semanticscholar   +1 more source

Combined dark matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS [PDF]

International Conference on Rebooting Computing, 2019
The search for Dark Matter (DM) has great potential to reveal physics beyond the Standard Model. As such, searches for evidence of DM particles are being carried out using a wide range of techniques, such as direct searches for DM particles, searches for
C. Armand, H. Abdalla, F. Aharonian, F. Ait-Benkhali, O. Anguener, C. Arcaro, T. Armstrong, H. Ashkar, Michael Backes, V. Barbosa Martins, A. Barnacka, M. Barnard, R. Batzofin, Y. Becherini, D. Berge, K. Bernloehr, B. Bi, Markus Boettcher, C. Boisson, J. Bolmont, Mathieu Bony (de), M. Breuhaus, R. Brose, F. Brun, T. Bulik, T. Bylund, F. Cangemi, S. Caroff, J. Catalano, P. Chambéry, T. Chand, Andrew Chen, G. Cotter, Malgorzata Curlo, H. Dalgleish, J. Damascene Mbarubucyeye, I. Davids, James O. J. Davies, J. Devin, A. Djannati-Ataï, A. Dmytriiev, A. Donath, Victor Doroshenko, L. Dreyer, L. du Plessis, Connor V. Duffy, K. Egberts, S. Einecke, J. Ernenwein, S. Fegan, K. Feijen, A. Fiasson, G. Fichet de Clairfontaine, G. Fontaine, Lott Frans, M. Fuessling, S. Funk, S. Gabici, Y. Gallant, G. Giavitto, L. Giunti, D. Glawion, J. Glicenstein, M. Grondin, S. Hattingh, M. Haupt, G. Hermann, W. Hofmann, C. Hoischen, T. Holch, M. Holler, D. Horns, Zhiqiu Huang, D. Huber, M. Hörbe, M. Jamrozy, F. Jankowsky, I. Jung, E. Kasai, K. Katarzyński, U. Katz, D. Khangulyan, B. Khélifi, S. Klepser, W. Kluźniak, N. Komin, R. Konno, K. Kosack, D. Kostunin, M. Kreter, G. Kukec Mezek, A. Kundu, G. Lamanna, S. Le Stum, A. Lemière, M. Lemoine-Goumard, J. Lenain, Fabian Leuschner, Chris Levy, T. Lohse, A. Luashvili, I. Lypova, J. Mackey, J. Majumdar, D. Malyshev, D. Malyshev, P. Marchegiani, A. Marcowith, A. Mares, G. Marti'i-Devesa, R. Marx, G. Maurin, P. Meintjes, M. Meyer, A. Mitchell, R. Moderski, L. Mohrmann, Alessandro Montanari, C. Moore, P. Morris, E. Moulin, J. Muller, T. Murach, K. Nakashima, Mathieu Naurois (de), H. Ndiyavala, J. Niemiec, A. Noel, P. O’Brien, L. Oberholzer, S. Ohm, Emma Ona-Wilhelmi (de), M. Ostrowski, S. Panny, M. Panter, D. Parsons, G. Peron, S. Pita, V. Poireau, D. Prokhorov, H. Prokoph, G. Puehlhofer, M. Punch, A. Quirrenbach, P. Reichherzer, A. Reimer, O. Reimer, Q. Remy, M. Renaud, B. Reville, F. Rieger, C. Romoli, G. Rowell, B. Rudak, H. Rueda Ricarte, Edna Ruiz Velasco, V. Sahakian, Simon Sailer, H. Salzmann, David Sánchez, A. Santangelo, Manami Sasaki, Johannes Schaefer, H. Schutte, U. Schwanke, F. Schüssler, M. Senniappan, A. Seyffert, J. Shapopi, K. Shiningayamwe, R. Simoni, A. Sinha, H. Sol, H. Spackman, A. Specovius, S. Spencer, M. Spir-Jacob, L. Stawarz, R. Steenkamp, C. Stegmann, S. Steinmassl, C. Steppa, Lei Sun, Tadayuki Takahashi, Takaaki Tanaka, T. Tavernier, A. Taylor, R. Terrier, H. Thiersen, C. Thorpe-Morgan, M. Tluczykont, L. Tomankova, M. Tsirou, N. Tsuji, R. Tuffs, Y. Uchiyama, J. V. D. van der Walt, C. van Eldik, C. van Rensburg, B. van Soelen, G. Vasileiadis, J. Veh, C. Venter, P. Vincent, J. Vink, H. Völk, S. Wagner, J. Watson, Richard White, A. Wierzcholska, Y. Wong, H. Yassin, A. Yusafzai, M. Zacharias, R. Zanin, D. Zargaryan, A. Zdziarski, A. Zech, Sylvia J. Zhu, A. Zmija, S. Zouari, N. Żywucka, A. Abeysekara, A. Albert, R. Alfaro, C. Álvarez, Juan de Dios Álvarez Romero, J. Angeles Camacho, J. C. Arteaga Velázquez, Arun Babu Kollamparambil, D. Avila Rojas, H. Ayala Solares, R. Babu, V. Baghmanyan, A. Barber, J. Becerra González, E. Belmont-Moreno, S. Benzvi, D. Berley, C. Brisbois, K. C. Caballero Mora, Tomás Capistrán Rojas, A. Carramiñana, S. Casanova, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, S. Coutiño de León, E. de la Fuente, C. de León, Lorenzo Diaz, R. Díaz Hernández, J. C. Díaz Vélez, B. Dingus, M. Durocher, M. DuVernois, R. Ellsworth, K. Engel, María Catalina Espinoza Hernández, Jason Fan, K. Fang, M. Fernandez Alonso, B. Fick, H. Fleischhack, J. L. Flores, N. Fraija, Diego Garcia Aguilar, J. García-González, J. L. García-Luna, G. Garcia-Torales, F. Garfias, G. Giacinti, H. Goksu, M. González, J. Goodman, J. P. Harding, S. Hernández Cadena, I. Herzog, J. Hinton, Dezhi Huang, F. Hueyotl-Zahuantitla, M. Hui, B. Humensky, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, H. Jhee, V. Joshi, G. Kunde, S. Kunwar, A. Lara, Jason Lee, William H. Lee, D. Lennarz, H. León Vargas, J. Linnemann, A. Longinotti, R. López-Coto, G. Luis-Raya, J. Lundeen, K. Malone, V. Marandon, O. Martinez, Israel Martinez Castellanos, H. Martínez Huerta, J. Martínez-Castro, J. Matthews, J. Mcenery, P. Miranda-Romagnoli, Jorge Antonio Morales Soto, E. Moreno Barbosa, M. Mostafá, A. Nayerhoda, L. Nellen, M. Newbold, M. Nisa, R. Noriega-Papaqui, L. Olivera-Nieto, N. Omodei, A. Peisker, Y. Pérez Araujo, Eucario Gonzalo Pérez Pérez, C. Rho, C. Rivière, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, F. Salesa Greus, A. Sandoval, M. Schneider, H. Schoorlemmer, J. Serna-Franco, G. Sinnis, A. Smith, W. Springer, P. Surajbali, I. Taboada, M. Tanner, K. Tollefson, I. Torres, Ramiro Torres Escobedo, Rhiannon M. Turner, F. Ureña-Mena, L. Villaseñor, Xiaojie Wang, I. Watson, T. Weisgarber, Felix Werner, E. Willox, Joshua R. Wood, G. Yodh, A. Zepeda, Hao Zhou, M. Capasso, R. Ong, I. Sadeh, P. Kaaret, Weidong Jin, W. Benbow, R. Mukherjee, R. Prado, Matt Lundy, Sameer Patel, P. Moriarty, Gernot Maier, A. Furniss, K. Ragan, David Williams, J. Buckley, L. Fortson, J. Quinn, J. Holder, C. Giuri, E. Pueschel, D. Nieto, C. Adams, S. O’Brien, D. Ribeiro, K. Pfrang, O. Gueta, G. Foote, A. Weinstein, Sajan Kumar, T. Williamson, D. Tak, Conor McGrath, T. Kleiner, M. Pohl, Paul Reynolds, B. Hona, D. Hanna, M. Santander, G. Sembroski, S. Patel, M. Errando, M. Kertzman, O. Hervet, Mireia Nievas-Rosillo, Mark Lang, E. Roache, T. Humensky, R. Shang, V. Vassiliev, A. Chromey, A. Falcone, J. Christiansen, A. Otte, A. Gent, A. Brill, J. Ryan, K. Farrell, G. Gillanders, Q. Feng, A. Archer, D. Kieda   +414 more
semanticscholar   +1 more source