Results 21 to 30 of about 7,707 (224)
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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THE WOLF-RAYET CONTENT OF M31 [PDF]
The Astrophysical Journal, 2012 Wolf-Rayet stars are evolved massive stars, and the relative number of WC-type and WN-type WRs should vary with the metallicity of the host galaxy, providing a sensitive test of stellar evolutionary theory. However, past studies of the WR content of M31 have been biased towards detecting WC stars, as their emission line signatures are much stronger ...
Neugent Kathryn +2 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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Proper motions of the satellites of M31 [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 Abstract We predict the range of proper motions of 19 satellite galaxies of M31 that would rotationally stabilize the M31 plane of satellites consisting of 15–20 members as identified by Ibata et al. Our prediction is based purely on the current positions and line-of-sight velocities of these satellites and the assumption that the plane ...
Ben Hodkinson, Jakub Scholtz
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Microlensing towards LMC and M31 [PDF]
Proceedings of the International Astronomical Union, 2004 The nature and the location of the lenses discovered in the microlensing surveys done so far towards the LMC remain unclear. Motivated by these questions we computed the optical depth for the different intervening populations and the number of expected events for self-lensing, using a recently drawn coherent picture of the geometrical structure and ...
jetzer, Ph. +2 more
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Planetary Nebula Kinematics in M31 [PDF]
The Astrophysical Journal, 2004 accepted to ApJ; main body of paper is 36 pages, including 14 ...
Hurley-Keller, Denise +3 more
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M31* and its circumnuclear environment [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 Submitted to MNRAS, 33 pages, 9 figures.
Li, Z, Wang, QD, Wakker, BP
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The M31 pixel lensing plan campaign : macho lensing and self-lensing signals [PDF]
, 2014 A.G. was supported by NSF grant AST-1103471. M.D. is thankful to Qatar National Research Fund (QNRF), member of Qatar Foundation, for support by grant NPRP 09-476-1-078. P.J.
SCARPETTA, Gaetano +78 more
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The Astrophysical Journal, 1974 The nucleus of M31 was photographed at a resolution of 0.2 sec with the 91-cm balloon-borne Stratoscope II telescope. At the half-intensity level, the nucleus was observed to be elliptical with its major axis lying in position angle of 63 (plus or minus 5) deg.
E. S. Light +2 more
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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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