Dwarf stars
White dwarf stars
... White dwarf stars were first discovered only fifty years ago, when the science of astrophysics was in its ...faint stars were of spectral type M and then learnt that 40 Eri B was both intrinsically ...
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Hot DAVs: a probable new class of pulsating white dwarf stars
... white dwarf at the lower end of the temperature range 45 000–30 000 K where a few helium atmosphere white dwarfs are ...white dwarf stars ...white dwarf star WD1017−138 pulsates in at least ...
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Mode identification from combination frequency amplitudes in pulsating white dwarf stars
... these stars in the separate instability strips are ...these stars range from 100 to 1500 s, with different periods favored depend- ing on ...(PNNV) stars, the first instability region, have spectra ...
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Hot DAVs : a probable new class of pulsating white dwarf stars
... white dwarf at the lower end of the temperature range 45 000–30 000 K where a few helium atmosphere white dwarfs are ...white dwarf stars ...white dwarf star WD1017−138 pulsates in at least ...
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An overview of white dwarf stars
... of stars in general. In addition, white dwarf stars represent ideal testbeds for our understanding of matter under extreme conditions, and work on their constitutive physics (neutrino production ...
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Deposition of steeply infalling debris around white dwarf stars
... The primary goals of this paper are to: (i) elucidate the physics of steep infall of mall bodies toward WDs; and (ii) develop a useful algorithm for determining the outcomes. In the following two sections we discuss the ...
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Photospheric studies of M dwarf stars
... This thesis dissertation is devoted to the study of the photospheres of M dwarfs, aiming at investigating the photospheric structures and global atmospheric properties of M dwarfs in the[r] ...
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The Fractional Hydrogen Atom: A Paradigm for Astrophysical Phenomena
... white dwarf star got the maximum possible conductivity in ...these stars are examples of giant perfect conduc- tors at a relatively high temperature and magnetic ...white dwarf and ordinary ...
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The formation of electrostatic shocks in quantum plasmas with relativistically degenerate electrons
... white dwarf stars is mainly due to their electromagnetic radiation, which reveals their physical properties and dynamics ...white dwarf stars so ...
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The chemical evolution of the Galactic Bulge seen through micro-lensing events
... giant stars ([5]). However, the MDF based on micro-lensed dwarf stars persistently shows two well-defined peaks, one that can be associated with a metal-poor old bulge, and another with super-solar ...
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Energetic properties of stellar pulsations across the Hertzsprung-Russell diagram
... some stars the mechanism can be e ff ...III stars ([6]), M dwarf stars ([7]), DAO white dwarfs originating from post-extreme horizontal branch stars ([8]) and Wolf-Rayet stars ...
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Influence of Supernova SN Ia Rate and the Early Star Formation Rate on the Galactic Chemical Evolution
... Based on the recently developed numerical approach to understand the formation and the chemical evolution of the milky-way galaxy in the solar neighborhood we study the influence of the supernova type SN Ia rates on the ...
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EL CVn type binaries discovery of 17 helium white dwarf precursors in bright eclipsing binary star systems
... white dwarf stars (M ...white dwarf that emerges has an anomalously low mass and is composed almost entirely of ...white dwarf companions (Lorimer ...companion stars are likely to also ...
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Laser-plasma and self-absorption measurements with applications to analysis of atomic and molecular stellar astrophysics spectra
... Atomic and molecular emission spectra of the type encountered in laser-induced breakdown spectroscopy occur in astrophysical spectra from white dwarf stars. Gas-dynamic expansion affects distribution of the ...
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DE Canum Venaticorum : a bright, eclipsing red dwarf–white dwarf binary
... white dwarf in the over- all ...white dwarf by the red ...white dwarf, and by visually comparing our WD spec- trum with the ones in Wesemael et ...
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Ventimiglia, Giulia (2011): The Kinematics of the Intracluster Light in the Core of the Hydra I Cluster. Dissertation, LMU München: Fakultät für Physik
... To understand whether the central region of Hydra I is relaxed, as suggested by X-ray observations, or it contains substructures, we wanted to further investigate the kinematics of the ICL component in the core of the ...
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Snigula, Jan (2006): Long Period Variables in Local Group Dwarf Galaxies. Dissertation, LMU München: Fakultät für Physik
... The detection and determination of the period solution of the variable sources is laid out in Chapter 4. To detect the variable sources a mask image was assembled by summing up the number of epochs the value of an ...
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The direct detection of the irradiated brown dwarf in the white dwarf - brown dwarf binary SDSS J141126.20+200911.1
... host stars replicating the same con- ditions must be very large, making them challenging systems to ...white dwarf was confirmed by Beuermann et ...white dwarf is cooler with T eff = 13 000 ± 300 K ...
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Method: a single nucleotide polymorphism genotyping method for Wheat streak mosaic virus
... Maize dwarf mosaic virus (MDMV), High plains virus (HPV), Barley yellow dwarf virus PAV (BYDV-PAV) and Cereal yellow dwarf virus RPV (CYDV-RPV), as well as the healthy host Triticum aestivum ...
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An irradiated brown dwarf companion to an accreting white dwarf
... flux observed from the white dwarf was assumed to be constant in phase, except for phase bins affected by an eclipse. In these, we reduced the flux by the fraction of the bin width during which the white ...
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