搜索结果: 1-11 共查到“天体物理学 Hydrogen”相关记录11条 . 查询时间(0.121 秒)
HE 1015-2050: Discovery of a Hydrogen-deficient carbon star at high galactic latitude
HE 1015-2050 Hydrogen-deficient carbon star
2011/1/10
Medium resolution spectral analysis of candidate Faint High Latitude Carbon (FHLC) stars from Hamburg/ESO survey has given us the potential to discover objects of rare types. Two primary spectral char...
Polarised foreground removal at low radio frequencies using rotation measure synthesis: Uncovering the signature of hydrogen reionisation
cosmology observation cosmology theory di use radiation nstrumentation:
2010/11/12
Measurement of redshifted 21-cm emission from neutral hydrogen promises to be the most e ective method for studying the reionisation history of hydrogen and,indirectly, the rst galaxies. These studie...
Studies of Diffuse Interstellar Bands. V. Pairwise Correlations of Eight Strong DIBs and Neutral Hydrogen, Molecular Hydrogen, and Color Excess
ISM lines and bands − ISM molecules
2010/11/15
We establish correlations between equivalent widths of eight diffuse interstel-lar bands (DIBs), and examine their correlations with atomic hydrogen, molec-ular hydrogen, and EB−V . The DIBs are...
Effects of Varying the Three-Body Molecular Hydrogen Formation Rate in Primordial Star Formation
galaxies formation stars formation ISM H II regions cos-mology theory
2010/11/12
The transformation of atomic hydrogen to molecular hydrogen through three-body reactions is a crucial stage in the collapse of primordial, metal-free halos,where the rst generation of stars (Populati...
Old White Dwarf Stars with Some Hydrogen -- Cooling Curves
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/6
We present theoretical analysis on old white dwarf stars with \emph{some} hydrogen, that possess a mass of surface hydrogen from $1\times10^{-11}M_{\sun}$ to $1\times10^{-7}M_{\sun}$. The evolution of...
Many theoretical and laboratory studies predict H2 to be formed in highly excited ro-vibrational states. The consequent relaxation of excited levels via a cascade of infrared transitions might be obse...
Near-IR Molecular Hydrogen Emission of Protostars: Probing Circumstellar Environments
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
We present new observations of near-infrared molecular hydrogen (H2) line emission in a sample of 18 Class I and flat-spectrum low mass protostars, primarily in the Tau- Aur and {\rho} Oph dark clouds...
Interaction of Atomic and Molecular Hydrogen with Tholin Surfaces at Low Temperatures
Earth and Planetary Astrophysics (astro-ph.EP)
2010/12/27
We study the interaction of atomic and molecular hydrogen with a surface of tholin, a man-made polymer considered to be an analogue of aerosol particles present in Titan's atmosphere, using thermal pr...
Search for the shape resonance in the negative ion of hydrogen in astrophysical plasmas
shape resonance astrophysical plasmas negative ion of hydrogen
2009/6/4
Search for the shape resonance in the negative ion of hydrogen in astrophysical plasmas。
Error estimates for emission lines in the hydrogen and helium isosequences
emission lines helium isosequences hydrogen isosequences
2009/6/4
Error estimates for emission lines in the hydrogen and helium isosequences。
Reduced description of light impurities in hydrogen coronal plasmas
hydrogen coronal plasmas light impurities
2009/6/4
Reduced description of light impurities in hydrogen coronal plasmas。