stars:early-type
Observational studies of wind and photospheric variability in three early type stars
... from early-type stars since it is model-independent compared to methods that determine mass-loss rates from UV and optical ...of stars with ionised stellar winds have revealed these ...
193
Fundamental Parameters of Early Type O4 Dwarfs from Galactic O Stars Spectroscopic Survey
... )galactic early-type O4 dwarf stars with high signal-to-noise ratio (S/N) ∼ 200-300, medium-resolution R∼ 2500 optical spectra of O4 dwarfs stars from Galactic O-Stars Spectroscopic ...
7
Neutral-helium line strengths in the early-type stars
... I present observations and analysis of the helium line strengths in the spectral range AA4000-6700 for 14 normal early-type stars. The purpose of this investigation is twofold. The first is to extend ...
231
Southern hemisphere early type stars at intermediate and high galactic latitudes
... latitude early-type star survey carried out by Hill ( 1970 ), To the basic 0-B5 list vjrere added several faint stars not classified by the HD suxv'^ey but vrith ^eotral types from the Cape ...
184
Non-radial pulsation of early-type stars
... Per stars is that they exhibit narrow spectral lines, indicating an absence of significant broadening due to ...line early-type star was made by Walker et ...broad-line early- type ...
224
Photospheric parameters of early type stars
... t stars to a level a t which which exposure tim es to obtain sufficient signal to noise ratios become p ro h ib itive ly long, negating the aperture advantages of large telescopes and the better inherent quantum ...
226
An investigation of galactic structure made from the study of the northern hemisphere early type stars at intermediate galactic latitudes
... that stars of different visual colours have different gpeetra m-% first noted by iiutherfufd (186%), Seeehl (1868) made the first attempt at classifying the spectra, The stars wero divided into four groups ...
369
A spectroscopic study of some early type emission line stars
... :The radial velocity curve of HR1273:The power spectrum of the combined data of HR1273.. :The residuals from the basic velocity curve of HR1273:The radial velocities of HR1713 plotted ag[r] ...
396
Nitrogen Abundances in Early-Type Be Stars
... Compared to Leone & Lanzafame (1998), the non-LTE equivalent widths of most of the He i lines agree well at lower effective temperatures, < 20,000 K, but the agreement at higher effective temperatures is not good. ...
293
oa Journal of the Astronomical Society of South Africa - The transparency of space
... On the other hand, the results of Stebbins and his associates, who have found selective absorption (colour excesses) in globular clusters and early type stars in[r] ...
18
Modelling transport processes in stellar radiative interiors
... of stars to a level that is fully reached by ...of early-type stars has been clearly improved by the implementation of type I rotational mixing in stellar evolution codes, as well as by ...
6
Characterizing the variability of stars with early-release Kepler data
... of stars was used to determine a “typical” distance for the stars, assuming zero attenuation by interstellar dust (see Table ...the stars (Figure 14) mostly follow the expected exponential decay for ...
21
The structures and extents of the chromospheres of late type stars
... By carefully untangling this complex problem it is possible to gain unique in- sight into the interior structure of stars. For example, high-dispersion spectroscopy provides diagnostic information on the structure ...
254
An investigation of molecular opacities for late type stars
... Triatomic Molecules 2.11 Determination of Vibrational Partition Functions of Triatomic Molecules... 2.12 Determination of Total Partition Functions and Equilibrium.[r] ...
549
Magnetic fields on young, solar-type stars
... solar-type stars to improve the understanding of the early development of solar and stellar dynamos and activity ...young stars (and activity effects on any attendant emerging planetary ...
352
8-12-2013 12:00 AM The atmospheric chemistry of magnetic Bp stars
... Bp stars has been restricted to mainly individual studies of specific ...Bp stars. We selected stars from our own ESO and CFHT observing programmes (with one target taken from the ESO archive) that ...
156
Surface brightness distributions of late type stars
... active stars has always been a controversial ...some stars with low vsini this could conceivably be caused by chromospheric in-filling of the cores of strong photospheric lines (Byrne 1992; Byrne ...
141
The secondary stars in cataclysmic variables and low-mass X-ray binaries
... secondary stars in cataclysmic variables (CVs) and low-mass X-ray binaries (LMXBs), using the new catalogue of Ritter & Kolb as a starting ...spectral type determinations and only 14 reliable mass ...
15
Accurate astrophysical parameters for algol type binary stars
... The scenario is much the same for stars between half a solar mass up to about three solar masses. Above three solar masses the evolution is significantly different because the star has a convective core which ...
151
A Bcool magnetic snapshot survey of solar-type stars
... five stars: HIP 3765 (Marcy & Basri 1989), HIP 15457 (Saar & Baliunas 1992), HIP 16537, HIP 96100 (Valenti, Marcy & Basri 1995) and HIP 88972 (Basri & Marcy 1988); see Reiners (2012) for an ...
20