Results 31 to 40 of about 51,668 (266)
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
doaj +1 more source
X-ray and Radio Variability of M31*, The Andromeda Galaxy Nuclear Supermassive Black Hole [PDF]
, 2009 We confirm our earlier tentative detection of M31* in X-rays and measure its light-curve and spectrum. Observations in 2004-2005 find M31* rather quiescent in the X-ray and radio.
Baganoff +50 more
core +2 more sources
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
openaire +1 more source
Stellar Kinematics in the Complicated Inner Spheroid of M31: Discovery of Substructure Along the Southeastern Minor Axis and its Relationship to the Giant Southern Stream [PDF]
, 2007 We present the discovery of a kinematically-cold stellar population along the SE minor axis of the Andromeda galaxy (M31) that is likely the forward continuation of M31's giant southern stream.
Battaglia G. +17 more
core +2 more sources
Spectroscopic Observations of Planetary Nebulae in the Northern Spur of M31 [PDF]
, 2013 We present spectroscopy of three planetary nebulae (PNe) in the Northern Spur of the Andromeda Galaxy (M31) obtained with the Double Spectrograph on the 5.1 m Hale Telescope at the Palomar Observatory.
Fang, X. +4 more
core +2 more sources
The Metal-Poor Halo of the Andromeda Spiral Galaxy (M31) [PDF]
, 2006 We present spectroscopic observations of red giant branch (RGB) stars over a large expanse in the halo of the Andromeda spiral galaxy (M31), acquired with the DEIMOS instrument on the Keck II 10-m telescope.
David B. Reitzel +9 more
core +2 more sources
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.
openaire +2 more sources
The outer halo globular cluster system of M31 - II. Kinematics [PDF]
, 2014 We present a detailed kinematic analysis of the outer halo globular cluster (GC) system of M31. Our basis for this is a set of new spectroscopic observations for 78 clusters lying at projected distances between Rproj ~20-140 kpc from the M31 centre ...
Babul, A. +15 more
core +1 more source
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
openaire +1 more source
ChildrenBackground: Reports on the survival of infants born at periviable gestation (GA of ≤24 weeks and birth weight of
Ibrahim Qattea +5 more
doaj +1 more source