Results 31 to 40 of about 307,688 (344)
An equatorial ultra iron-poor star identified in BOSS
, 2015 We report the discovery of SDSS J131326.89-001941.4, an ultra iron-poor red giant star ([Fe/H] ~ -4.3) with a very high carbon abundance ([C/Fe]~ +2.5).
Aguado, D. S. +8 more
core +1 more source
White dwarf stars with carbon atmospheres [PDF]
Nature, 2007 White dwarfs represent the endpoint of stellar evolution for stars with initial masses between approximately 0.07 and 8-10, where is the mass of the Sun (more massive stars end their life as either black holes or neutron stars). The theory of stellar evolution predicts that the majority of white dwarfs have a core made of carbon and oxygen, which ...
Dufour, Patrick +3 more
openaire +4 more sources
ANALYSIS OF THE SPECTRAL ENERGY DISTRIBUTION OFTHE COOLEST RCrB TYPE CARBON STAR DY Per
Odessa Astronomical Publications, 2008 We analysed the spectral energy distribution of the evolved carbon star DY Per by spectral synthesis technique. The red giant shows the photometric features of R CrB type stars.
L. A. Yakovina +3 more
doaj +1 more source
Wolf 1465: Not a Bright Dwarf Carbon Star
, 2018 Wolf 1465 has been suggested as a candidate for a bright dwarf carbon star.
Dimitriadis, Georgios, Margon, Bruce
core +1 more source
Discovery of interstellar anions in Cepheus star-forming region [PDF]
, 2011 We report the detection of microwave emission lines from the hydrocarbon anion C6H- and its parent neutral C6H in the star-forming region L1251A (in Cepheus), and the pre-stellar core L1512 (in Auriga).
Bell +35 more
core +2 more sources
Nuclear Physics A, 2005 The triple alpha process plays an important role in the production of 12C in stars. Its rate is known with an accuracy of about 12%. We examine the corresponding uncertainties introduced in the description of pre-supernova stars, of nucleosynthesis in a core-collapse SN explosion, and of the production of 12C during the third dredge-up in asymptotic ...
openaire +2 more sources
The Frequency of Carbon Stars among Extremely Metal-poor Stars [PDF]
The Astrophysical Journal, 2005 We demonstrate that there are systematic scale errors in the [Fe/H] values determined by the Hamburg/ESO Survey (and by inference by the HK Survey in the past) for certain extremely metal poor highly C-enhanced giants. The consequences of these scale errors are that a) the fraction of carbon stars at extremely low metallicities has been overestimated ...
Cohen, Judith G. +8 more
openaire +3 more sources
IRAS04496-6958: A luminous carbon star with silicate dust in the Large Magellanic Cloud [PDF]
, 1999 We describe ISO observations of the obscured Asymptotic Giant Branch (AGB) star IRAS04496-6958 in the Large Magellanic Cloud (LMC). This star has been classified as a carbon star.
Blommaert, J. A. D. L. +9 more
core +3 more sources
The orbital motion, absolute mass, and high-altitude winds of exoplanet HD209458b
, 2010 For extrasolar planets discovered using the radial velocity method, the spectral characterization of the host star leads to a mass-estimate of the star and subsequently of the orbiting planet. In contrast, if also the orbital velocity of the planet would
Albrecht, Simon +3 more
core +1 more source
SDSS J142625.71+575218.3: the First Pulsating White Dwarf With A Large Detectable Magnetic Field [PDF]
, 2008 We report the discovery of a strong magnetic field in the unique pulsating carbon- atmosphere white dwarf SDSS J142625.71 + 575218.3. From spectra gathered at the MMT and Keck telescopes, we infer a surface field of B(s) similar or equal to 1.2 MG, based
Dufour, P. +4 more
core +2 more sources