Results 1 to 10 of about 10,967 (146)
Dwarf Cepheids in the Carina Dwarf Spheroidal Galaxy [PDF]
The Astronomical Journal, 1998 20 pages of text, 7 ...
Denise Hurley-Keller +2 more
openaire +7 more sources
Globular clusters and dwarf spheroidal galaxies [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2008 Abstract Traditionally, globular clusters and dwarf spheroidal galaxies have been distinguished by using one or more of the following criteria: (i) mass, (ii) luminosity, (iii) size, (iv) mass-to-light ratio and (v) spread in metallicity.
Babcock H. W. +3 more
openaire +5 more sources
Manganese in dwarf spheroidal galaxies [PDF]
Astronomy & Astrophysics, 2012 19 pages, 10 figures, accepted for publication in Astronomy & ...
Mike Irwin +14 more
openaire +7 more sources
Laboratory exploration of mineral precipitates from Europa's subsurface ocean
Journal of Applied Crystallography, Volume 54, Issue 5, Page 1455-1479, October 2021., 2021 Precipitation experiments from a model Europan ocean solution subjected to fast and slow freezing suggest that the highly hydrated Na–Mg sulfate phase Na2Mg(SO4)2·16H2O is one of the lowest‐temperature mineral phases likely to be stable on Europa's surface and may therefore be astrobiologically significant.The precipitation of hydrated phases from a ...
Stephen P. Thompson +5 more
wiley +1 more source
Journal of Geophysical Research: Planets, Volume 126, Issue 5, May 2021., 2021 Abstract The origin of the interstellar object 1I/‘Oumuamua has defied explanation. In a companion paper (Jackson & Desch, 2021), we show that a body of N2 ice with axes 45 m × 44 m × 7.5 m at the time of observation would be consistent with its albedo, nongravitational acceleration, and lack of observed CO or CO2 or dust.
S. J. Desch, A. P. Jackson
wiley +1 more source
The Andromeda Dwarf Spheroidal Galaxies [PDF]
Symposium - International Astronomical Union, 1999 Our current knowledge of M31's dwarf spheroidal companions is reviewed. Two topics of recent interest constitute the bulk of this review. First, color-magnitude diagrams reaching below the horizontal branch have been constructed for two M31 dwarf spheroidals, based on images from HST/WFPC2. The horizontal branches are predominantly red in both galaxies,
Taft E. Armandroff, Gary S. Da Costa
openaire +3 more sources
The Progenitors of Dwarf Spheroidal Galaxies [PDF]
The Astronomical Journal, 2003 Dwarf spheroidal (dSph) galaxies present an evolutionary puzzle that we explore in 40 early- and late-type dwarfs in the Local Group and nearby field. Although dSphs formed stars over extended periods, today all but one are free of detectable interstellar matter (ISM), even in the Fornax dSph, where stars still formed 100 Myr ago.
J. S. Gallagher +2 more
openaire +3 more sources
Dwarf Spheroidal Galaxies in the Virgo Cluster [PDF]
The Astrophysical Journal, 1998 We present a study of the smallest and faintest galaxies found in a very deep photographic R band survey of regions of the Virgo Cluster, totalling over 3 square degrees, made with the UK Schmidt Telescope. The objects we detect have the same physical sizes and surface brightnesses as Local Group dwarf spheroidal galaxies.
Jones, JB +3 more
openaire +6 more sources
Life and times of dwarf spheroidal galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 12 pages, 6 figures, MNRAS ...
SALVADORI, STEFANIA +2 more
openaire +5 more sources
Gravitational tides and dwarf spheroidal galaxies [PDF]
Astronomy & Astrophysics, 2014 The effect of the local environment on the evolution of dwarf spheroidal galaxies is poorly understood. We have undertaken a suite of simulations to investigate the tidal impact of the Milky Way on the chemodynamical evolution of dwarf spheroidals that resemble present day classical dwarfs using the SPH code GEAR.
Pascale Jablonka +3 more
openaire +6 more sources