Results 31 to 40 of about 159,199 (212)

DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of Our Nearest Neighbor

The Astrophysical Journal, 2023
We present Dark Energy Spectroscopic Instrument (DESI) observations of the inner halo of M31, which reveal the kinematics of a recent merger—a galactic immigration event—in exquisite detail.
Arjun Dey, Joan R. Najita, Sergey E. Koposov, J. Josephy-Zack, Gabriel Maxemin, Eric F. Bell, C. Poppett, E. Patel, L. Beraldo e Silva, A. Raichoor, D. Schlegel, D. Lang, A. Meisner, Adam D. Myers, J. Aguilar, S. Ahlen, C. Allende Prieto, D. Brooks, A. P. Cooper, K. S. Dawson, A. de la Macorra, P. Doel, A. Font-Ribera, Juan García-Bellido, S. Gontcho A Gontcho, J. Guy, K. Honscheid, R. Kehoe, T. Kisner, A. Kremin, M. Landriau, L. Le Guillou, Michael E. Levi, T. S. Li, Paul Martini, R. Miquel, J. Moustakas, Jundan Nie, N. Palanque-Delabrouille, F. Prada, E. F. Schlafly, Ray M. Sharples, Gregory Tarlé, Yuan-Sen Ting, L. Tyas, M. Valluri, Risa H. Wechsler, H. Zou   +47 more
doaj   +1 more source

A recurrent nova super-remnant in the Andromeda galaxy [PDF]

Nature, 2019
30 pages, 8 ...
Darnley, M.J., Hounsell, R., O’Brien, T.J., Henze, M., Rodríguez-Gil, P., Shafter, A.W., Shara, M.M., Vaytet, N.M.H., Bode, M.F., Ciardullo, R., Davis, B.D., Galera-Rosillo, R., Harman, D.J., Harvey, E.J., Healy, M.W., Ness, J.-U., Ribeiro, V.A.R.M., Williams, S.C.   +17 more
openaire   +7 more sources

Satellites and stellar streams of the Andromeda Galaxy [PDF]

, 2020
One of the theories of galactic evolution is that large structures grow, hierarchically, from the merger and accretion of smaller ones. Evidence for this lies in the spectacular stellar streams observed around the Milky Way, Andromeda and other galaxies ...
Preston, Janet
core   +1 more source

Utopia Remembers: The Soviet Past in the Imagined Communist Future

The Russian Review, Volume 85, Issue 4, Page 478-494, October 2026.
Abstract After a twenty‐five‐year hiatus, the reappearance of utopian literature in 1957 prompted Soviet literary watchdogs to corral the subgenre into an ideologically‐acceptable mold. A key requirement was for future generations to be depicted as reverently commemorating the past.
Antony Kalashnikov
wiley   +1 more source

Xanthomonas euvesicatoria Associated With Outbreaks of Bacterial Blight of Onion in Central Brazil

Plant Pathology, Volume 75, Issue 4, July‐August 2026.
An investigation into bacterial blight (Xanthomonas euvesicatoria) outbreaks in Brazilian onions highlights the critical role of weeds and leftover soybeans as pathogen reservoirs. Effective disease control requires managing these alternative hosts. ABSTRACT Since 2018, outbreaks of typical bacterial blight caused by Xanthomonas have been observed in ...
Luciellen da Costa Ferreira, Angelica Rodrigues Alves, Wellington da Silva Macedo, Maurício Rossato, Valter Rodrigues Oliveira, Alice M. Quezado‐Duval   +5 more
wiley   +1 more source

The large-scale structure of the halo of the Andromeda galaxy. I. Global stellar density, morphology and metallicity properties [PDF]

, 2015
We present an analysis of the large-scale structure of the halo of the Andromeda galaxy, based on the Pan-Andromeda Archeological Survey (PAndAS), currently the most complete map of resolved stellar populations in any galactic halo. Despite the presence
Penarrubia, J, Babul, Arif, Bernard, E.J, Fardal, Mark, Tanvir, Nial R, Martin, Nicolas F, Collins, Michelle L., Navarro, J F, Rich, R M, Widrow, L. M., Ibata, Rodrigo A, Mackey, Alasdair, McConnachie, Alan W, Chapman, Scott C., Irwin, Mike, Ferguson, A. M. N., Lewis, Geraint   +16 more
core   +1 more source

Questions Should Have Answers

European Journal of Philosophy, Volume 34, Issue 2, Page 423-440, June 2026.
ABSTRACT Making sense of the world often requires one to come up with new ideas, including ideas one had previously been unable to think of. How and when should this be done? I propose and defend a norm of rationality linking wondering, belief, and abilities to conceive: one must not both wonder a question and reject all answers to it that one can ...
Michael Deigan
wiley   +1 more source

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

Discovery of 20 UV-emitting SNRs in M31 with UVIT

The Astronomical Journal, 2023
We present the first catalog of supernova remnants (SNRs) in M31 that exhibit diffuse ultraviolet (UV) emission. UV images of M31 were obtained by the Ultraviolet Imaging Telescope (UVIT) on the AstroSat satellite, and the list of SNRs was obtained from ...
Denis Leahy, Christopher Monaghan, Sujith Ranasinghe   +2 more
doaj   +1 more source

A comparison of the Andromeda and Milky Way galaxies [PDF]

Symposium - International Astronomical Union, 1985
A comparison of some of the basic properties of M31 and the Milky Way indicates that in almost every respect M31 is larger than the Galaxy. It is more luminous, redder, more massive, and of earlier Hubble type. A detailed comparison of the spiral structure, based on optical tracers, for comparable areas in the outer parts of each galaxy shows ...
openaire   +1 more source