Results 91 to 100 of about 370,839 (289)

Is the Andromeda galaxy approaching our galaxy Milky Way?

Communications of the Byurakan Astrophysical Observatory
Nodoubt that thedarkenergycarrier interactswiththebaryonicmatter. Due tothis interaction someportionsofenergyaretransferringgraduallytoallbaryonicobjectsandtheirsystemswithoutany exceptionatallhierarchical levelsof thebaryonicworld.
H. Harutyunian, A.M. Grigoryan, A. Khasawneh, A. A. Torosyan   +3 more
semanticscholar   +1 more source

Search for dark matter gamma-ray emission from the Andromeda Galaxy with the High-Altitude Water Cherenkov Observatory [PDF]

Journal of Cosmology and Astroparticle Physics, 2018
The Andromeda Galaxy (M31) is a nearby (∼780 kpc) galaxy similar to our own Milky Way. Observational evidence suggests that it resides in a large halo of dark matter (DM), making it a good target for DM searches.
A. Albert, R. Alfaro, C. Alvarez, J. Álvarez, R. Arceo, J. C. Arteaga-Velázquez, D. Rojas, H. Solares, A. Becerril, E. Belmont-Moreno, S. Benzvi, A. Bernal, C. Brisbois, K. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, M. Castillo, U. Cotti, J. Cotzomi, S. D. de León, C. D. León, S. Dichiara, B. Dingus, M. DuVernois, J. C. Díaz-Vélez, C. Eckner, K. Engel, O. Enŕıquez-Rivera, C. Espinoza, D. Fiorino, N. Fraija, E. D. L. Fuente, A. Galván-Gámez, J. García-González, F. Garfias, A. G. Muñoz, M. González, 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, G. Kunde, D. Lennarz, H. L. Vargas, J. Linnemann, A. Longinotti, G. Raya, R. Luna-García, K. Malone, S. Marinelli, O. Martinez, J. Martínez-Castro, H. Martínez-Huerta, J. Matthews, P. Miranda-Romagnoli, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, M. Newbold, M. Nisa, R. Noriega-Papaqui, R. Pelayo, J. Pretz, E. Pérez-Pérez, Z. Ren, C. Rho, C. Rivière, D. Rosa-González, M. Rosenberg, E. Ruiz-Velasco, E. Ruiz-Velasco, H. Salazar, F. Greus, A. Sandoval, M. Schneider, M. Arroyo, G. Sinnis, A.J. Smith, R. Springer, P. Surajbali, I. Taboada, O. Tibolla, K. Tollefson, I. Torres, T. Ukwatta, L. Villaseñor, T. Weisgarber, S. Westerhoff, J. Wood, T. Yapici, G. Zaharijas, A. Zepeda, H. Zhou   +101 more
semanticscholar   +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

THEHERSCHELEXPLOITATION OF LOCAL GALAXY ANDROMEDA (HELGA). II. DUST AND GAS IN ANDROMEDA [PDF]

The Astrophysical Journal, 2012
We present an analysis of the dust and gas in Andromeda, using Herschel images sampling the entire far-infrared peak. We fit a modified-blackbody model to ~4000 quasi-independent pixels with spatial resolution of ~140pc and find that a variable dust-emissivity index (beta) is required to fit the data. We find no significant long-wavelength excess above
Luigi Spinoglio, Vianney Lebouteiller, Haley Louise Gomez, Christine D. Wilson, B. O'Halloran, Gianfranco Gentile, Mathew W. Smith, Robert Braun, E. Mentuch, S. C. Madden, Benjamin L. Schulz, Walter Kieran Gear, Jacopo Fritz, Asantha Cooray, Joris Verstappen, G. P. Ford, David L. Clements, J. A. D. L. Blommaert, Steve Eales, Luca Cortese, Maarten Baes, I. De Looze, Jason M. Kirk, Karl D. Gordon, Karl D. Gordon, Alessandro Boselli, George J. Bendo, Mat Page, Julia Roman-Duval, David A. Thilker, Médéric Boquien   +30 more
openaire   +11 more sources

Collision tomography: Physical properties of possible progenitors of the Andromeda stellar stream [PDF]

, 2016
To unveil a progenitor of the Andromeda Giant Stellar Stream, we investigate the interaction between an accreting satellite galaxy and the Andromeda Galaxy using an $N$-body simulation. A comprehensive parameter study with 247 models is performed by varying size and mass distribution of the progenitor dwarf galaxy.
arxiv   +1 more source

A New Giant Stellar Structure in the Outer Halo of M31

, 2004
The Sloan Digital Sky Survey has revealed an overdensity of luminous red giant stars ~ 3 degrees (40 projected kpc) to the northeast of M31, which we have called Andromeda NE.
Bell, Eric F., Brewington, Howard, Brinkmann, J., Grebel, Eva K., Harvanek, Michael, Holtzman, Jon A., Ivezic, Zeljko, Kleinman, S. J., Kniazev, Alexei Y., Krzesinski, Jurek, Lamb, Don Q., Long, Dan, Martinez-Delgado, David, Newman, Peter R., Nitta, Atsuko, Rix, Hans-Walter, Rockosi, Constance M., Snedden, Stephanie A., Walterbos, Rene A. M., Zucker, Daniel B.   +19 more
core   +2 more sources

A New Luminous Blue Variable in the Outskirts of the Andromeda Galaxy [PDF]

Astrophysical Journal, 2019
The hot massive luminous blue variables (LBVs) represent an important evolutionary phase of massive stars. Here, we report the discovery of a new LBV—LAMOST J0037+4016 in the distant outskirt of the Andromeda galaxy.
Yang Huang, Huaiwei Zhang, Chun Wang, Bing-Gan Chen, Yang-Wei Zhang, Jincheng Guo, H.-B. Yuan, M. Xiang, Z. Tian, Guangxing Li, Xiaowei Liu   +10 more
semanticscholar   +1 more source

Elemental Abundances in M31: Individual and Coadded Spectroscopic [Fe/H] and [α/Fe] throughout the M31 Halo with SPLASH

The Astrophysical Journal, 2023
We present spectroscopic chemical abundances of red giant branch stars in Andromeda (M31), using medium-resolution ( R ∼ 6000) spectra obtained via the Spectroscopic and Photometric Landscape of Andromeda’s Stellar Halo survey.
J. Leigh Wojno, Karoline M. Gilbert, Evan N. Kirby, Ivanna Escala, Puragra Guhathakurta, Rachael L. Beaton, Jason Kalirai, Masashi Chiba, Steven R. Majewski   +8 more
doaj   +1 more source

Ellipticities of Globular Clusters in the Andromeda Galaxy [PDF]

Symposium - International Astronomical Union, 1988
A program of investigation of globular clusters' structural parameters in nearby galaxies has been initiated at the Rozhen National Observatory, Bulgaria (Spassova and Staneva 1984). Here we report on the projected ellipticities of 88 bright globular clusters in M 31, obtained on plates taken with the 2 m Ritchey-Chretien telescope at Rozhen (16 m ...
Nedka M. Spassova, Anelia V. Staneva, V. Golev   +2 more
openaire   +3 more sources

Scientific photography and astronomy: Technology applied to understanding the universe

Mètode Science Studies Journal: Annual Review
In 1925, Edwin Hubble took the first step towards increasing the size of the known universe by several orders of magnitude using the precarious photographic methods available at the time: glass plates and photosensitive emulsions.
Fernando Abalos Vazquez, Javier Ábalos
doaj   +1 more source