HD 140283 is the closest and brightest metal-poor Population II halo star (distance = 58 pc and V = 7.21), an ideal target that allows us to approach these questions, and one of a list of 34 benchmark stars defined for Gaia astrophysical parameter calibration. In the framework of ...
HD 140283 is an extremely metal-deficient and high-velocity subgiant in the solar neighborhood, having a location in the HR diagram where absolute magnitude is most sensitive to stellar age. Because it is bright, nearby, unreddened, and has a well-determined chemical composition, this star avoi...
Context. HD 140283 is a reference subgiant that is metal poor and confirmed to be a very old star. The element abundances of this type of old star can constrain the nature and nucleosynthesis processes that occurred in its (even older) progenitors. The present study may shed light on ...
HD140283 is an extremely metal-deficient and high-velocity subgiant in the solar neighborhood, having a location in the Hertzsprung-Russell diagram where absolute magnitude is most sensitive to stellar age. Because it is bright, nearby, unreddened, and has a well-determined chemical composition, ...
lized for the same star with small modifications (which gave the programme a new identification number). For the 1993 observations, the procedure was altered somewhat in an attempt to improve the relative wavelength calibration between separate orbits. One wavelength calibration spec- ...
Excrement star 00:44 GSC 02620-00648A 01:26 GSC 06214-00210 05:07 HD 10975 01:22 HD 1145 01:11 HD 114514 01:17 HD 12648 03:35 HD 140283 01:11 HD 142250 02:20 HD 18438 01:20 HD 191981 01:28 HD 20782&HD 20781 02:33 HD 20794 05:14 HD 2685 01:13 HD...
Because of the possible enhanced deuterium abundance of D/H = 2.5 10(-4) (the ISM D/H = 1.65x10(-5) ) recently reported in quasar absorption spectra, we searched for the D_alpha line at 6561 A in the metal-poor halo star HD 140283 (G2IV, [Fe/H] = -2.6; Teff= 5700K). We...
14.The starHD140283 lies about 190 light-years away in the constellation Libra. HD140283恒星距离天秤座有190光年之远。 「 Scientific American 2013年3月集」评价该例句:好评差评指正 CCTV 见闻 15.Each scene has been recorded with 4K ultraHDlive signals and advanced audio systems. ...
Context. It is well known that cool star atmospheres depart from local thermodynamic equilibrium (LTE). Making an accurate abundance deter... K Lind,T Nordlander,A Wehrhahn,... - 《Astronomy & Astrophysics》 被引量: 0发表: 2022年 VizieR Online Data Catalog: Abundances of two very metal-poor...