Results 51 to 60 of about 3,957,653 (321)
THE STARS OF THE LOWER PART OF MAIN SEQUENCE
Odessa Astronomical Publications, 2007 Atmospheric parameters (Teff , log g, [Fe/H], Vt), Li, and volatile (O, Na, Al, Zn) and refractory (Si, Ti, V, Cr, Co and Ni) element abundances in 133 stars belonging to the low part of MS have been determined. Among them about 30 stars are the variable
T. V. Mishenina +6 more
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The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog
The Astrophysical Journal Supplement Series, 2023 The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated ∼65 O-type stars and hundreds of OB stars.
Nicholas J. Wright +7 more
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A non-main-sequence secondary in SY Cancri [PDF]
, 2005 Simultaneous spectroscopic and photometric observations of the Z Cam type dwarf nova SY Cancri were used to obtain absolute flux calibrations. A comparison of the photometric calibration with a wide slit spectrophotometric calibration showed that either ...
Dave V +4 more
core +3 more sources
International Astronomical Union Colloquium, 1993 AbstractThe Pre-Main-Sequence (pre-MS) is defined as the phase following the protostellar stage and ending with the ignition of hydrogen in the stellar core. Models in hydrostatic and thermal equilibrium such as typical “Hayashi track” models are basically adequate to describe the internal structure of pre-MS stars, although for a fraction of pre-MS ...
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Differential rotation on the lower main sequence [PDF]
Astronomische Nachrichten, 2005 AbstractWe compute the differential rotation of main sequence stars of the spectral types F, G, K, and M by solving the equation of motion and the equation of convective heat transport in a mean‐field formulation. For each spectral type the rotation rate is varied to study the dependence of the surface shear on this parameter.
G. Rüdiger, M. Küker
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FoxO1 signaling in B cell malignancies and its therapeutic targeting
FEBS Letters, EarlyView.FoxO1 has context‐specific tumor suppressor or oncogenic character in myeloid and B cell malignancies. This includes tumor‐promoting properties such as stemness maintenance and DNA damage tolerance in acute leukemias, or regulation of cell proliferation and survival, or migration in mature B cell malignancies.
Krystof Hlavac +3 more
wiley +1 more source
HIGH PRECISE EFFECTIVE TEMPERATURES OF 182 MAIN SEQUENCE STARS
Odessa Astronomical Publications, 2008 High precise temperatures (σ = 10 - 15 K) have been determined from line depth ratios for a set of 182 F-K field dwarfs of about solar metallicity (-0.5 < [Fe/H] < +0.4), based on high resolution (R=42 000), high S/N echelle spectra.
S. I. Belik +2 more
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Mass loss in main-sequence B stars
, 2014 We calculate radiatively driven wind models of main-sequence B stars and provide the wind mass-loss rates and terminal velocities. The main-sequence mass-loss rate strongly depends on the stellar effective temperature.
Krticka, Jiri
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Main-sequence stellar eruption model for V838 Mon [PDF]
, 2002 We propose that the energy source of the outburst of V838 Mon and similar objects is an accretion event, i.e., gravitational energy rather than thermonuclear runaway. We show that the merger of two main sequence stars, of masses 1.5 Mo and 0.1-0.5 Mo can
Noam Soker, Prialnik D., Romuald Tylenda
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Turbulence in main sequence stars [PDF]
International Astronomical Union Colloquium, 1980 It has for long been realized that the interpretation of stellar spectral lines normally requires broadening velocities well in excess of purely thermal motions. The origin and structure of such velocity fields, which have usually been summarized as turbulence, still appear to be a subject of controversy.
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