General relativistic effects in the structure of massive white dwarfs
Sign Up to like & getrecommendations! Published in 2018 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-018-2354-8
Abstract: In this work we investigate the structure of white dwarfs using the Tolman–Oppenheimer–Volkoff equations and compare our results with those obtained from Newtonian equations of gravitation in order to put in evidence the importance of… read more here.
Keywords: dwarfs; white dwarfs; massive white; radius ... See more keywords
M dwarfs found in the first Byurakan spectral sky survey database. Gaia EDR3 and TESS data. Some preliminary results
Sign Up to like & getrecommendations! Published in 2023 at "Publications of the Astronomical Society of Australia"
DOI: 10.1017/pasa.2023.20
Abstract: Abstract In order to gain more information on the 236 M dwarfs identified in the First Byurakan Survey (FBS) low-resolution (lr) spectroscopic database, Gaia EDR3 high-accuracy astrometric and photometric data and Transiting Exoplanet Survey Satellite… read more here.
Keywords: database gaia; gaia edr3; dwarfs; survey ... See more keywords
Black dwarf supernova in the far future
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2262
Abstract: In the far future long after star formation has ceased the universe will be populated by sparse degenerate remnants, mostly white dwarfs, though their ultimate fate is an open question. These white dwarfs will cool… read more here.
Keywords: dwarfs; white dwarfs; far future; supernova ... See more keywords
Formation of dwarf galaxies in major gas-rich disc–disc mergers
Sign Up to like & getrecommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stab672
Abstract: Galaxies usually follow a mass–metallicity relation, where higher mass galaxies are typically more metal-rich than lower mass galaxies. Yet, tidal dwarf galaxies are outliers to this relation. These kinds of dwarfs are formed in galactic… read more here.
Keywords: disc; dwarfs; dwarf galaxies; gas rich ... See more keywords
Surveying nearby brown dwarfs with HGCA: Direct imaging discovery of a faint, high-mass brown dwarf orbiting HD 176535 A
Sign Up to like & getrecommendations! Published in 2023 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1315
Abstract: Brown dwarfs with well-measured masses, ages and luminosities provide direct benchmark tests of substellar formation and evolutionary models. We report the first results from a direct imaging survey aiming to find and characterize substellar companions… read more here.
Keywords: dwarf; high mass; direct imaging; dwarfs ... See more keywords
Towards a holistic magnetic braking model – II: explaining several long-term internal- and surface-spin properties of solar-like stars and the Sun
Sign Up to like & getrecommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stae1704
Abstract: We extend our model of magnetic braking (MB), driven by an α − Ω dynamo mechanism, from fully convective M-dwarfs (FCMDs) to explain the surface and internal spin Pspin evolution of partly convective dwarfs (PCDs)… read more here.
Keywords: dwarfs; core; surface; model ... See more keywords
Rotation plays a role in the generation of magnetic fields in single white dwarfs
Sign Up to like & getrecommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stae307
Abstract: Recent surveys of close white dwarf binaries as well as single white dwarfs have provided evidence for the late appearance of magnetic fields in white dwarfs, and a possible generation mechanism a crystallization and rotation-driven… read more here.
Keywords: dwarfs; rotation; magnetic white; white dwarfs ... See more keywords
Bounding destruction time-scales of minor planets orbiting white dwarfs with the sesquinary catastrophe
Sign Up to like & getrecommendations! Published in 2025 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staf1120
Abstract: Dynamical activity attributed to the destruction of minor planets orbiting white dwarfs has now been photometrically monitored in individual systems for up to one decade, long enough to measure significant cessation and re-emergence of transit… read more here.
Keywords: dwarfs; sesquinary catastrophe; minor planets; white dwarfs ... See more keywords
The quenching of star formation in dwarf galaxies: new perspectives from deep-wide surveys
Sign Up to like & getrecommendations! Published in 2025 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staf233
Abstract: Dwarf galaxies dominate the galaxy number density, making them critical to our understanding of galaxy evolution. However, typical dwarfs are too faint to be visible outside the very local Universe in past surveys like the… read more here.
Keywords: dwarfs; star formation; density; dwarf galaxies ... See more keywords
Optical and near-infrared linear polarization of low and intermediate-gravity ultra-cool dwarfs
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stw3278
Abstract: We aim to study the optical and near-infrared linear polarimetric properties of a sample of young M7-L7 dwarfs ($\approx$1-500 Myr) with spectroscopic signatures of low- and intermediate-gravity atmospheres. We collected optical ($RIZ$) and near-infrared ($YJHK_{\rm… read more here.
Keywords: dwarfs; linear polarization; near infrared; gravity ... See more keywords
Four new massive pulsating white dwarfs including an ultramassive DAV
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx320
Abstract: We report the discovery of four massive ($M > 0.8\,M_\odot$) ZZ Ceti white dwarfs, including an ultramassive $1.16\,M_\odot$ star. We obtained ground based, time-series photometry for thirteen white dwarfs from the Sloan Digital Sky Survey… read more here.
Keywords: dwarfs; white dwarfs; including ultramassive; odot ... See more keywords