Results 11 to 20 of about 12,786 (266)
Dwarf Cepheids in the Carina Dwarf Spheroidal Galaxy [PDF]
The Astronomical Journal, 1998 We have discovered 20 dwarf Cepheids (DC) in the Carina dSph galaxy from the analysis of individual CCD images obtained for a deep photometric study of the system.
Arnold R. +9 more
core +5 more sources
HI Observations Towards the Sagittarius Dwarf Spheroidal Galaxy [PDF]
, 1999 We have measured the 21-cm line of Galactic HI over more than 50 square degrees in the direction of the Sagittarius dwarf spheroidal galaxy. The data show no evidence of HI associated with the dwarf spheroidal which might be consider analogous to the ...
Burton, W. B., Lockman, Felix J.
core +5 more sources
Metallicity gradients in the Sagittarius dwarf spheroidal Galaxy [PDF]
Astronomy & Astrophysics, 2001 Metallicity gradients in the Sagittarius dwarf Galaxy (Sgr) are investigated by using infrared photometric data from the 2MASS survey. To search for metallicity effects, the giant branch in a field situated near the Center of the Sgr is compared to the ...
Alard +16 more
core +7 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.
Matthew Nichols, Yves Revaz, P. Jablonka
openalex +5 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
Manganese in dwarf spheroidal galaxies [PDF]
Astronomy & Astrophysics, 2012 We provide manganese abundances (corrected for the effect of the hyperfine structure) for a large number of stars in the dwarf spheroidal galaxies Sculptor and Fornax and for a smaller number in the Carina and Sextans dSph galaxies. Abundances had already been determined for a number of other elements in these galaxies including a and iron peak ones ...
North P., Cescutti G, Jablonka P.
openaire +6 more sources
Dwarf spheroidal galaxies: Keystones of galaxy evolution [PDF]
Publications of the Astronomical Society of the Pacific, 1994 Dwarf spheroidal galaxies are the most insignificant extragalactic stellar systems in terms of their visibility, but potentially very significant in terms of their role in the formation and evolution of much more luminous galaxies. We discuss the present observational data and their implications for theories of the formation and evolution of both dwarf
Gallagher III, John S. +1 more
openaire +2 more sources
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
Mass Modelling of dwarf Spheroidal Galaxies [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractWe study the origin and properties of unbound stars in the kinematic samples of dwarf spheroidal galaxies. For this purpose we have run a high resolution N-body simulation of a two-component dwarf galaxy orbiting in a Milky Way potential. We create mock kinematic data sets by observing the dwarf in different directions.
Klimentowski, J +5 more
openaire +3 more sources
Kinematic subpopulations in dwarf spheroidal galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 Submitted to ...
Ural, Uğur +9 more
openaire +3 more sources