SRGeJ045359. 9+ 622444: A 55 Minute Period Eclipsing AM Canum Venaticorum Star Discovered from a Joint SRG/eROSITA+ ZTF Search

AC Rodriguez, I Galiullin, M Gilfanov… - The Astrophysical …, 2023 - iopscience.iop.org
Abstract AM Canum Venaticorum (AM CVn) systems are ultracompact binaries where a
white dwarf accretes from a helium-rich degenerate or semidegenerate donor. Some AM …

Towards a holistic magnetic braking model from the evolution of cataclysmic variables to stellar spin-down–I: the spin-down of fully convective M-dwarfs

A Sarkar, L Yungelson, CA Tout - Monthly Notices of the Royal …, 2023 - academic.oup.com
We extend a magnetic braking (MB) model, which has been used earlier to address the
evolution of cataclysmic variables, to address the spin period P spin evolution of fully …

Evolved cataclysmic variables as progenitors of AM CVn stars

A Sarkar, H Ge, CA Tout - Monthly Notices of the Royal …, 2023 - academic.oup.com
We model cataclysmic variables (CVs) with solar metallicity donors (X= 0.7 and Z= 0.02) that
evolve to form AM CVn stars through the evolved CV formation channel using various …

Reversing the verdict: Cataclysmic variables could be the dominant progenitors of AM CVn binaries after all

D Belloni, MR Schreiber - Astronomy & Astrophysics, 2023 - aanda.org
Context. AM CVn binaries are potential progenitors of thermonuclear supernovae and strong
sources of persistent gravitational wave radiation. For a long time, it has been believed that …

Towards a holistic magnetic braking model–II: explaining several long-term internal-and surface-spin properties of solar-like stars and the Sun

A Sarkar, P Eggenberger, L Yungelson… - Monthly Notices of the …, 2024 - academic.oup.com
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 evolution of partly …

[HTML][HTML] Compact objects in close orbits as gravitational wave sources: Formation scenarios and properties

Z Li, X Chen - Results in Physics, 2024 - Elsevier
Abstract Gravitational Waves (GWs) provide a unique way to explore our Universe. The
ongoing ground-based detectors, eg, LIGO, Virgo, and KAGRA, and the upcoming next …

One model to rule them all: magnetic braking from CVs to low-mass stars

A Sarkar, H Ge, L Yungelson, CA Tout - arXiv preprint arXiv:2401.04090, 2024 - arxiv.org
We present the results of the study of cataclysmic variables (CVs) and AM Canum
Venaticorum (AM CVn) stars with our double dynamo (DD) formalism of angular momentum …

SRGeJ045359. 9+ 622444: A 55-min Period Eclipsing AM CVn Discovered from a Joint SRG/eROSITA+ ZTF Search

AC Rodriguez, I Galiullin, M Gilfanov… - arXiv preprint arXiv …, 2023 - arxiv.org
AM CVn systems are ultra-compact binaries where a white dwarf accretes from a helium-rich
degenerate or semi-degenerate donor. Some AM CVn systems will be among the loudest …