scholarly journals Tidal deformation of non-relativistic white dwarf star in Beyond Horndeski modified gravity model

2020 ◽  
Author(s):  
A. R. Adlinaufal ◽  
A. Sulaksono
Keyword(s):  
Gravity Model ◽  
White Dwarf ◽  
Modified Gravity ◽  
Dwarf Star ◽  
Tidal Deformation

Aspects of the Collapse of Compact Objects

1980 ◽  
Vol 4 (1) ◽  
pp. 49-50
Author(s):  
R. A. Gingold ◽  
J. J. Monaghan
Keyword(s):  
Neutron Star ◽  
Neutron Stars ◽  
White Dwarf ◽  
Compact Objects ◽  
Dwarf Star

Misner Thorne and Wheeler (1973), (page 629) suggested that a freshly formed White Dwarf star of several solar masses would, if slowly — rotating, collapse to form a neutron star pancake which would become unstable and eventually produce several, possibly colliding, neutron stars.

Multi Depot Vehicle Routing Using Ant Colony Optimization - Trip Assignment of Freight Flow Using Modified Gravity Model

2021 ◽  
Author(s):  
Husnain Saeed ◽  
Shahid Ikramullah ◽  
Mushtaq Khan ◽  
Fahd Amjad ◽  
Liaqat Ali ◽  
...  
Keyword(s):  
Ant Colony Optimization ◽  
Vehicle Routing ◽  
Gravity Model ◽  
Modified Gravity ◽  
Ant Colony ◽  
Freight Flow

Jupiter-sized planet found orbiting tiny white dwarf star

Physics World ◽  
2021 ◽  
Vol 33 (11) ◽  
pp. 7i-7i
Author(s):  
Hamish Johnston
Keyword(s):  
White Dwarf ◽  
Dwarf Star

scholarly journals Rapid Evolution of the Gaseous Exoplanetary Debris around the White Dwarf Star HE 1349–2305

2018 ◽  
Vol 854 (1) ◽  
pp. 40 ◽  
Author(s):  
E. Dennihy ◽  
J. C. Clemens ◽  
B. H. Dunlap ◽  
S. M. Fanale ◽  
J. T. Fuchs ◽  
...  
Keyword(s):  
White Dwarf ◽  
Rapid Evolution ◽  
Dwarf Star

The high-resolution spectrum of the pulsating, pre-white dwarf star PG 1159-035 (GW VIR)

1989 ◽  
Vol 97 ◽  
pp. 1440 ◽  
Author(s):  
James Liebert ◽  
F. Wesemael ◽  
D. Husfeld ◽  
R. Wehrse ◽  
S. G. Starrfield ◽  
...  
Keyword(s):  
High Resolution ◽  
White Dwarf ◽  
High Resolution Spectrum ◽  
Dwarf Star

A measurement of secular evolution in the pre-white dwarf star

1985 ◽  
Vol 292 ◽  
pp. 606 ◽  
Author(s):  
D. E. Winget ◽  
E. L. Robinson ◽  
R. E. Nather ◽  
S. O. Kepler ◽  
D. Odonoghue
Keyword(s):  
White Dwarf ◽  
Dwarf Star ◽  
Secular Evolution

The Dwarf Nova EX Hydrae

1974 ◽  
Vol 2 (5) ◽  
pp. 271-274 ◽  
Author(s):  
R. D. Watson ◽  
P. T. Rayner
Keyword(s):  
Binary System ◽  
Time Resolution ◽  
White Dwarf ◽  
Roche Lobe ◽  
Dwarf Star ◽  
Dwarf Nova ◽  
Photoelectric Time

The object EX Hya is a dwarf nova with a binary period of 98.3 min (Mumford 1964, 1967). Warner (1972, 1973a) has observed two complete cycles of this star with a photoelectric time resolution of 5 sec. These observations suggested that EX Hya can be understood in terms of the model proposed by Warner and Nather (1971) in their discussion of U Gem. In this model, a white dwarf primary of a semi-detached binary system is surrounded by a disk of gas formed from matter transfered from the secondary, which is a cool dwarf star filling its Roche lobe.

scholarly journals The High Resolution Spectrum of the Pulsating, Pre-White Dwarf Star PG 1159-035 (GW VIR)

1989 ◽  
Vol 114 ◽  
pp. 384-387
Author(s):  
James Liebert ◽  
F. Wesemael ◽  
D. Husfeld ◽  
R. Wehrse ◽  
S. G. Starrfield ◽  
...  
Keyword(s):  
High Resolution ◽  
Effective Temperature ◽  
White Dwarf ◽  
White Dwarfs ◽  
High Resolution Spectrum ◽  
Dwarf Star ◽  
Dwarf Stars ◽  
New Class ◽  
White Dwarf Stars ◽  
Nonradial Pulsation

First reported at the IAU Colloquium No. 53 on White Dwarfs (McGraw et al. 1979), PG 1159-035 (GW Vir) is the prototype of a new class of very hot, pulsating, pre-white dwarf stars. It shows complicated, nonradial pulsation modes which have been studied exhaustively, both observationally and theoretically. The effective temperature has been crudely estimated as 100,000 K with log g ~ 7 (Wesemael, Green and Liebert 1985, hereafter WGL).

scholarly journals A planetesimal orbiting within the debris disc around a white dwarf star

Science ◽  
2019 ◽  
Vol 364 (6435) ◽  
pp. 66-69 ◽  
Author(s):  
Christopher J. Manser ◽  
Boris T. Gänsicke ◽  
Siegfried Eggl ◽  
Mark Hollands ◽  
Paula Izquierdo ◽  
...  
Keyword(s):  
Emission Line ◽  
Solid Body ◽  
White Dwarf ◽  
Periodic Variation ◽  
Emission Lines ◽  
Line Profiles ◽  
Dwarf Star ◽  
Dwarf Stars ◽  
White Dwarf Stars ◽  
Short Period

Many white dwarf stars show signs of having accreted smaller bodies, implying that they may host planetary systems. A small number of these systems contain gaseous debris discs, visible through emission lines. We report a stable 123.4-minute periodic variation in the strength and shape of the Ca ii emission line profiles originating from the debris disc around the white dwarf SDSS J122859.93+104032.9. We interpret this short-period signal as the signature of a solid-body planetesimal held together by its internal strength.

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