TESS photometry of the asynchronous polar CD Ind: A short period analog of BY Cam
Sign Up to like & getrecommendations! Published in 2020 at "Advances in Space Research"
DOI: 10.1016/j.asr.2020.03.038
Abstract: Abstract We present a time-series analysis of the asynchronous polar CD Ind, using fast cadence TESS photometry. A similar analysis is performed using ground based photometry of BY Cam. These asynchronous polars show remarkably similar… read more here.
Keywords: ind; accretion region; tess; accretion ... See more keywords
Accretion flows in nonmagnetic white dwarf binaries as observed in X-rays
Sign Up to like & getrecommendations! Published in 2020 at "Advances in Space Research"
DOI: 10.1016/j.asr.2020.05.031
Abstract: Abstract Cataclysmic Variables (CVs) are compact binaries with white dwarf (WD) primaries. CVs and other accreting WD binaries (AWBs) are useful laboratories for studying accretion flows, gas dynamics, outflows, transient outbursts, and explosive nuclear burning… read more here.
Keywords: nonmagnetic white; accretion; flows nonmagnetic; white dwarf ... See more keywords
A pulsating white dwarf in an eclipsing binary
Sign Up to like & getrecommendations! Published in 2020 at "Nature Astronomy"
DOI: 10.1038/s41550-020-1037-z
Abstract: White dwarfs are the burnt-out cores of Sun-like stars and are the fate of 97 per cent of the stars in our Galaxy. The internal structure and composition of white dwarfs are hidden by their… read more here.
Keywords: pulsating white; white dwarfs; eclipsing binary; white dwarf ... See more keywords
Universality of free fall from the orbital motion of a pulsar in a stellar triple system
Sign Up to like & getrecommendations! Published in 2018 at "Nature"
DOI: 10.1038/s41586-018-0265-1
Abstract: Einstein’s theory of gravity—the general theory of relativity1—is based on the universality of free fall, which specifies that all objects accelerate identically in an external gravitational field. In contrast to almost all alternative theories of… read more here.
Keywords: white dwarf; universality free; system; free fall ... See more keywords
A measurement of the equation of state of carbon envelopes of white dwarfs
Sign Up to like & getrecommendations! Published in 2020 at "Nature"
DOI: 10.1038/s41586-020-2535-y
Abstract: White dwarfs represent the final state of evolution for most stars1–3. Certain classes of white dwarfs pulsate4,5, leading to observable brightness variations, and analysis of these variations with theoretical stellar models probes their internal structure.… read more here.
Keywords: state; white dwarf; white dwarfs; equation state ... See more keywords
Modelling quantum aspects of disruption of a white dwarf star by a black hole
Sign Up to like & getrecommendations! Published in 2021 at "Scientific Reports"
DOI: 10.1038/s41598-021-81707-5
Abstract: We study the final stages of the evolution of a binary system consisted of a black hole and a white dwarf star. We implement the quantum hydrodynamic equations and carry out numerical simulations. As a… read more here.
Keywords: dwarf star; white dwarf; dwarf; black hole ... See more keywords
Pulsating low-mass white dwarfs in the frame of new evolutionary sequences - IV. The secular rate of period change
Sign Up to like & getrecommendations! Published in 2017 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201630376
Abstract: We present a theoretical assessment of the expected temporal rates of change of periods ($\dot{\Pi}$) for low-mass ($M_{\star}/M_{\sun} \lesssim 0.45$) and extremely low-mass (ELM, $M_{\star}/M_{\sun} \lesssim 0.18-0.20$) white-dwarf stars, based on fully evolutionary low-mass He-core… read more here.
Keywords: period change; pre; mass; white dwarf ... See more keywords
Towards the origin of the radio emission in AR Scorpii, the first radio-pulsing white dwarf binary
Sign Up to like & getrecommendations! Published in 2017 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201730948
Abstract: Context. The binary system AR Sco contains an M star and the only known radio-pulsing white dwarf. The system shows emission from radio to X-rays, likely dominated by synchrotron radiation. The mechanism that produces most… read more here.
Keywords: radio emission; radio pulsing; radio; white dwarf ... See more keywords
Properties of white dwarfs in Einstein-Λ gravity
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/02/040
Abstract: In this paper, we explore the properties of white dwarfs with the modified TOV equation in Einstein-$\Lambda$ gravity, the equilibrium configurations predict a maximum mass limit for white dwarfs same as the Chandrasekhar limit when… read more here.
Keywords: white dwarfs; properties white; einstein; white dwarf ... See more keywords
Electromagnetic emission of white dwarf binary mergers
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/03/044
Abstract: It has been recently proposed that the ejected matter from white dwarf (WD) binary mergers can produce transient, optical and infrared emission similar to the "kilonovae" of neutron star (NS) binary mergers. To confirm this… read more here.
Keywords: white dwarf; binary mergers; electromagnetic emission; dwarf binary ... See more keywords
Polarization measurements of the polluted white dwarf G29-38
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa1023
Abstract: We have made high precision polarimetric observations of the polluted white dwarf G29-38 with the HIgh Precision Polarimetric Instrument 2. The observations were made at two different observatories -- using the 8.1-m Gemini North Telescope… read more here.
Keywords: white dwarf; dwarf g29; polarization; polluted white ... See more keywords