Results 21 to 30 of about 370,839 (289)
RED SUPERGIANTS IN THE ANDROMEDA GALAXY (M31) [PDF]
The Astrophysical Journal, 2009 Red supergiants are a short-lived stage in the evolution of moderately massive stars (10-25Mo), and as such their location in the H-R diagram provides an exacting test of stellar evolutionary models. Since massive star evolution is strongly affected by the amount of mass-loss a star suffers, and since the mass-loss rates depend upon metallicity, it is ...
Philip Massey +7 more
openalex +6 more sources
Millisecond pulsars and the gamma-ray excess in Andromeda [PDF]
, 2018 The Fermi Gamma-Ray Space Telescope has provided evidence for diffuse gamma-ray emission in the central parts of the Milky Way and the Andromeda galaxy. This excess has been interpreted either as dark matter annihilation emission or as emission from thousands of millisecond pulsars (MSPs).
Antonini, Fabio +2 more
arxiv +5 more sources
THE PAndAS VIEW OF THE ANDROMEDA SATELLITE SYSTEM. I. A BAYESIAN SEARCH FOR DWARF GALAXIES USING SPATIAL AND COLOR-MAGNITUDE INFORMATION [PDF]
Astrophysical Journal, 2013 We present a generic algorithm to search for dwarf galaxies in photometric catalogs and apply it to the Pan-Andromeda Archaeological Survey (PAndAS).
Nicolas F Martin +2 more
exaly +3 more sources
Measuring the Mass of Missing Baryons in the Halo of Andromeda Galaxy with Gamma-Ray Observations [PDF]
Astrophysical Journal, 2021 It has been suggested that a huge amount of baryon resides in the circumgalactic medium (CGM) extending out to the virial radii of galaxies. In this work we attempt to measure the baryon mass in the CGM with a novel method based on the gamma-ray ...
Yi Zhang +5 more
openalex +3 more sources
Inflow of low-metallicity cool gas in the halo of the Andromeda galaxy [PDF]
, 2021 As the closest L ∗ galaxy to our own Milky Way, the Andromeda galaxy (M31) is an ideal laboratory for studies of galaxy evolution. The AMIGA project has recently provided observations of the cool ( T ∼ 10 4 K) phase of the circumgalactic medium (CGM) of ...
Andrea Afruni +2 more
openalex +3 more sources
Andromeda IX: A New Dwarf Spheroidal Satellite of M31 [PDF]
Astrophysical Journal, 2004 We report the discovery of a new dwarf spheroidal satellite of M31, Andromeda IX, based on resolved stellar photometry from the Sloan Digital Sky Survey (SDSS). Using both SDSS and public archival data we have estimated its distance and other physical properties, and compared these to the properties of a previously known dwarf spheroidal companion ...
Daniel B Zucker +2 more
exaly +2 more sources
ANDROMEDA XXVIII: A DWARF GALAXY MORE THAN 350 kpc FROM ANDROMEDA [PDF]
Astrophysical Journal Letters, 2011 We report the discovery of a new dwarf galaxy, Andromeda XXVIII, using data from the recently-released SDSS DR8. The galaxy is a likely satellite of Andromeda, and, at a separation of $365^{+17}_{-1}$ kpc, would be one of the most distant of Andromeda's satellites.
Eric F Bell, Nicolas F Martin
exaly +2 more sources
Unidentified Line in X-Ray Spectra of the Andromeda Galaxy and Perseus Galaxy Cluster [PDF]
Physical Review Letters, 2014 We report a weak line at 3.52±0.02 keV in x-ray spectra of the Andromeda galaxy and the Perseus galaxy cluster observed by the metal-oxide-silicon (MOS) and p-n (PN) CCD cameras of the XMM-Newton telescope.
Oleg Ruchayskiy
exaly +2 more sources
A recurrent nova super-remnant in the Andromeda galaxy [PDF]
Nature, 2017 The accretion of hydrogen onto a white dwarf star ignites a classical nova eruption1,2—a thermonuclear runaway in the accumulated envelope of gas, leading to luminosities up to a million times that of the Sun and a high-velocity mass ejection that ...
M. Darnley +23 more
semanticscholar +11 more sources
The Faint Globular Cluster in the Dwarf Galaxy Andromeda I [PDF]
Publications of the Astronomical Society of Australia, 2017 Observations of globular clusters in dwarf galaxies can be used to study a variety of topics, including the structure of dark matter halos and the history of vigorous star formation in low-mass galaxies. We report on the properties of the faint globular cluster (M_V ~ -3.4) in the M31 dwarf galaxy Andromeda I. This object adds to the growing population
Anil C Seth, David J Sand, Jay Strader
exaly +2 more sources