Results 101 to 110 of about 10,594 (212)

Nearby primitive galaxies offer a window into the early universe. [PDF]

Proc Natl Acad Sci U S A, 2022
Croswell K.
europepmc   +1 more source

The dwarf spheroidal galaxy Andromeda I

The Astrophysical Journal, 1990
Images of Andromeda I in the visual and near-infrared show a giant branch characteristic of galactic globular clusters of intermediate metallicity. The distance of the galaxy is estimated from the tip of the giant branch to be 790 + or - 60 kpc. The physical dimensions and luminosity are similar to those of the dwarf spheroidal in Sculptor. There is no
Jeremy Mould, Jerome Kristian
openaire   +1 more source

Extinction Distributions in Nearby Star-resolved Galaxies. I. M31

The Astronomical Journal
An extinction distribution of the Andromeda galaxy (M31) is constructed with member stars as tracers by fitting multiband photometric data from UKIRT/WFCAM, Panoramic Survey Telescope and Rapid Response System 1, and Gaia DR3.
Yuxi Wang, Jian Gao, Yi Ren, Bingqiu Chen   +3 more
doaj   +1 more source

China's 'sky eye': exploring the universe by measuring faint cosmic radio signals. [PDF]

Natl Sci Rev, 2023
Zhao W.
europepmc   +1 more source

AstroSat UVIT Survey of M31: New Compact Source Catalog

The Astrophysical Journal Supplement Series
An ultraviolet survey of M31 was carried out during 2017–2023 with the UltraViolet Imaging Telescope (UVIT) instrument on board the AstroSat Observatory. Here we present far- and near-ultraviolet (FUV and NUV) observations from the M31 UVIT survey, which
Denis Leahy, Sujith Ranasinghe, Saptadwipa Mitra, Kripansh Rawal   +3 more
doaj   +1 more source

The Hubble Space Telescope Survey of M31 Satellite Galaxies. IV. Survey Overview and Lifetime Star Formation Histories

The Astrophysical Journal
From >1000 orbits of HST imaging, we present deep homogeneous resolved star color–magnitude diagrams that reach the oldest main-sequence turnoff and uniformly measured star formation histories (SFHs) of 36 dwarf galaxies (−6 ≥ M _V ≥ −17) associated with
Alessandro Savino, Daniel R. Weisz, Andrew E. Dolphin, Meredith J. Durbin, Nitya Kallivayalil, Andrew Wetzel, Jay Anderson, Gurtina Besla, Michael Boylan-Kolchin, Thomas M. Brown, James S. Bullock, Andrew A. Cole, Michelle L. M. Collins, M. C. Cooper, Alis J. Deason, Aaron L. Dotter, Mark Fardal, Annette M. N. Ferguson, Tobias K. Fritz, Marla C. Geha, Karoline M. Gilbert, Puragra Guhathakurta, Rodrigo Ibata, Michael J. Irwin, Myoungwon Jeon, Evan N. Kirby, Geraint F. Lewis, Dougal Mackey, Steven R. Majewski, Nicolas Martin, Alan McConnachie, Ekta Patel, R. Michael Rich, Evan D. Skillman, Joshua D. Simon, Sangmo Tony Sohn, Erik J. Tollerud, Roeland P. van der Marel   +37 more
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HST Proper Motion of Andromeda III. Another Satellite Coorbiting the M31 Satellite Plane

The Astrophysical Journal
We measure the absolute proper motion of Andromeda III (And III) using Advanced Camera for Surveys/Wide Field Channel and WFPC2 exposures spanning an unprecedented 22 yr time baseline.
Dana I. Casetti-Dinescu, Marcel S. Pawlowski, Terrence M. Girard, Kosuke Jamie Kanehisa, Alexander Petroski, Max Martone, Vera Kozhurina-Platais, Imants Platais   +7 more
doaj   +1 more source

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. Theconsequencesof theenergytransferare quitedramatic forall objects. Themostdramaticchanges takeplaceat thenuclear level.
H. A. Harutyunian, A.M. Grigoryan, A. Khasawneh, A. A. Torosyan   +3 more
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The Molecular Clouds of M31

The Astrophysical Journal
Deep interferometric observations of CO and dust continuum emission are obtained with the Submillimeter Array at 230 GHz to investigate the physical nature of the giant molecular cloud (GMC) population in the Andromeda galaxy (M31).
Charles J. Lada, Jan Forbrich, Glen Petitpas, Sébastien Viaene   +3 more
doaj   +1 more source

Can the New Neutrino Telescopes Reveal the Gravitational Properties of Antimatter?

Advances in Astronomy, 2011
We argue that the hypothesis of the gravitational repulsion between matter and antimatter can be tested at the Ice Cube, a neutrino telescope, recently constructed at the South Pole.
Dragan Slavkov Hajdukovic
doaj   +1 more source