Results 21 to 30 of about 7,749 (214)
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 +8 more
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The Astrophysical Journal, 1984 Maps of M31 have been obtained at wavelengths of 12, 25, 60, and 100 microns. Emission is detected from the center and from a ring of 50 arcmin radius. The ring is that also seen in H I, in H II, and in radio continuum radiation. The spectrum of the central emission suggests a hotter dust temperature than in the ring. M31 is a weak infrared source, the
Habing, H.J. +10 more
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Symposium - International Astronomical Union, 1974 The luminosity of the brightest Hiiregions of M31 was determined with the NRAO 3-element interferometer at 3.7 cm and 11 cm wavelength. It is unlikely that M31 has any superbright Hiiregions such as W51 or W49; our Galaxy has between 10 and 20 Hiiregions that are more luminous than any in M31.
J. H. Spencer, B. F. Burke
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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 +2 more
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Could M31 be the result of a major merger?
EPJ Web of Conferences, 2012 We investigated a scenario in which M31 could be the remnant of a gas-rich major merger. Galaxy merger simulations, highly constrained by observations, were run using GADGET 2 in order to reproduce M31. We succeeded in reproducing the global shape of M31,
Puech M. +5 more
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Time-domain studies of M31 [PDF]
Astronomical Review, 2016 M31, our closest neighboring galaxy, is a stepping stone to studies of stellar evolution, star formation, galaxy evolution, and cosmology. However, due to the difficulties of performing photometry in such crowded fields and the lack of wide cameras to encompass the entire galaxy, there has not been a complete census of the stellar contents of M31.
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On the Gamma-Ray Emission of the Andromeda Galaxy M31
The Astrophysical Journal Letters, 2023 Using the γ -ray data obtained with the Large Area Telescope on board the Fermi Gamma-ray Space Telescope (Fermi) for ∼14 yr, we examine the high-energy emission emanating from the center of the Andromeda galaxy M31.
Yi Xing +3 more
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The Astrophysical Journal, 1997 This Letter gives the results of a determination of the thickness and the optimum inclination (i.e., the angle between the galactic plane and the tangent plane) of M31, which are 1.01 kpc and 775, respectively. The method for determining the thickness of spiral galaxies is proposed by Peng, on the basis of the solution of Poisson's equation for a ...
Jun Ma, Qiu-He Peng, Qiu-Sheng Gu
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ChildrenBackground: Reports on the survival of infants born at periviable gestation (GA of ≤24 weeks and birth weight of
Ibrahim Qattea +5 more
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Constraints on the Formation of M31’s Stellar Halo from the SPLASH Survey
Galaxies, 2017 The SPLASH (Spectroscopic and Photometric Landscape of Andromeda’s Stellar Halo) Survey has observed fields throughout M31’s stellar halo, dwarf satellites, and stellar disk.
Karoline Gilbert
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