Results 21 to 30 of about 51,668 (266)
Open Astronomy, 2022 We compare the results on the chemical composition of four globular clusters (GCs) in M31 (Bol 6, Bol 20, Bol 45, and Bol 50) (Maricheva M. 2021. Study of integrated spectra of four globular clusters in M 31. Astrophys. Bull. 76:389–404. doi: https://doi.
Sharina Margarita Eugene +1 more
doaj +1 more source
Monthly Notices of the Royal Astronomical Society, 2002 Recent work by several groups has established the properties of the dwarf satellites to M31. We reexamine the reported kinematics of this group employing a fresh technique we have developed previously. By calculating the distribution of a chi statistic (which we define in the paper) for the M31 system, we conclude that the total mass (disk plus halo ...
Gottesman, S. T. +2 more
openaire +2 more sources
Searching for Radio Outflows from M31* with VLBI Observations
The Astrophysical Journal, 2023 As one of the nearest and most dormant supermassive black holes (SMBHs), M31* provides a rare but promising opportunity for studying the physics of black hole accretion and feedback at the quiescent state. Previous Karl G.
Sijia Peng +5 more
doaj +1 more source
A single-merger scenario for the formation of the giant stream and the warp of M31 [PDF]
, 2013 We propose that the accretion of a dwarf spheroidal galaxy provides a common origin for the giant southern stream and the warp of M31. We run about 40 full N-body simulations with live M31, infalling galaxies with varying masses and density profiles, and
Colin, Jacques +2 more
core +2 more sources
M31 Transverse Velocity and Local Group Mass from Satellite Kinematics [PDF]
, 2008 We present several different statistical methods to determine the transverse velocity vector of M31. The underlying assumptions are that the M31 satellites on average follow the motion of M31 through space, and that the galaxies in the outer parts of the
Dunn A. M. +8 more
core +1 more source
Globular Cluster and Galaxy Formation: M31, the Milky Way and Implications for Globular Cluster Systems of Spiral Galaxies [PDF]
, 2004 The globular cluster (GC) systems of the Milky Way and of our neighboring spiral galaxy, M31, comprise 2 distinct entities, differing in 3 respects. 1. M31 has young GCs, ages from ~100 Myr to 5 Gyr old, as well as old globular clusters.
Bajaja E. +19 more
core +4 more sources
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
openaire +2 more sources
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
openaire +3 more sources
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
doaj +1 more source
Planetary nebulae in M32 and the bulge of M31: Line intensities and oxygen abundances [PDF]
, 1998 We present spectroscopy of planetary nebulae in M32 and in the bulge of M31 that we obtained with the MOS spectrograph at the Canada-France-Hawaii Telescope. Our sample includes 30 planetary nebulae in M31 and 9 planetary nebulae in M32. We also observed
McCall, Marshall L. +2 more
core +2 more sources