PSR J1012+5307: a millisecond pulsar with an extremely low-mass white dwarf companion

Autor: Rene P. Breton, D. Mata Sánchez, Alina G. Istrate, David L. Kaplan, M. H. van Kerkwijk

Publikováno v: Monthly Notices of the Royal Astronomical Society, 494, 4031-4042
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 494, 3, pp. 4031-4042

Binaries harbouring millisecond pulsars enable a unique path to determine neutron star masses: radio pulsations reveal the motion of the neutron star, while that of the companion can be characterised through studies in the optical range. PSR J1012+53

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b922eb8b06bf06f0b1403f4d033b98c8
https://doi.org/10.1093/mnras/staa983

Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS. II. Discovery of two new GW Vir stars: TIC 333432673 and TIC 095332541

Autor: Maja Vučković, G. O. da Rosa, M. Uzundag, Keaton J. Bell, A. H. Córsico, Souza Oliveira Kepler, N. Reindl, Alina G. Istrate, Michael Higgins, Leandro Gabriel Althaus, Klaus Werner

Publikováno v: Astronomy & Astrophysics, 655, 1-12
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Astronomy & Astrophysics, 655, pp. 1-12

Context. The Transiting Exoplanet Survey Satellite (TESS) mission is revolutionizing the blossoming area of asteroseismology, particularly of pulsating white dwarfs and pre-white dwarfs, thus continuing the impulse of its predecessor, the Kepler miss

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d280c027d92cda65f9b6e66ce7e71c40
http://hdl.handle.net/2066/239752

It has to be cool: on supergiant progenitors of binary black hole mergers from common-envelope evolution

Autor: Gijs Nelemans, Martyna Chruslinska, J. Klencki, Alina G. Istrate

Publikováno v: Astronomy & Astrophysics, 645, pp. 1-27
Astronomy & Astrophysics, 645, 1-27

Common-envelope (CE) evolution in massive binary systems is thought to be one of the most promising channels for the formation of compact binary mergers. In the case of merging binary black holes (BBHs), the essential CE phase takes place at a stage

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a91add56db6a71f49f6a5fe29a20a433
http://arxiv.org/abs/2006.11286

A revisit of PSR J1909−3744 with 15-yr high-precision timing

Autor: M. S. Kehl, A. Chalumeau, Kang Liu, Gilles Theureau, Lucas Guillemot, Ismaël Cognard, G. Desvignes, John Antoniadis, Norbert Wex, Lijing Shao, Alina G. Istrate, Thomas M. Tauris, Paulo C. C. Freire

Publikováno v: Monthly Notices of the Royal Astronomical Society, 499, 2, pp. 2276-2291
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 499 (2), pp.2276-2291. ⟨10.1093/mnras/staa2993⟩
Monthly Notices of the Royal Astronomical Society, 499, 2276-2291
Liu, K, Guillemot, L, Istrate, A G, Shao, L, Tauris, T M, Wex, N, Antoniadis, J, Chalumeau, A, Cognard, I, Desvignes, G, Freire, P C C, Kehl, M S & Theureau, G 2020, ' A revisit of PSR J1909-3744 with 15-yr high-precision timing ', Monthly Notices of the Royal Astronomical Society, vol. 499, no. 2, pp. 2276-2291 . https://doi.org/10.1093/mnras/staa2993

We report on a high-precision timing analysis and an astrophysical study of the binary millisecond pulsar, PSR J1909$-$3744, motivated by the accumulation of data with well improved quality over the past decade. Using 15 years of observations with th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d03b2c16de2937aa838d33a872d392e3
https://hdl.handle.net/2066/225644

Discovery, TESS Characterization, and Modeling of Pulsations in the Extremely Low-mass White Dwarf GD 278

Autor: Isaac D. Lopez, J. J. Hermes, Leila M. Calcaferro, Keaton J. Bell, Adam Samuels, Zachary P. Vanderbosch, Alejandro H. Córsico, Alina G. Istrate

Publikováno v: The Astrophysical Journal, 922, 1-11
The Astrophysical Journal, 922, 2, pp. 1-11
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

We report the discovery of pulsations in the extremely low mass (ELM), likely helium-core white dwarf GD 278 via ground- and space-based photometry. GD 278 was observed by the Transiting Exoplanet Survey Satellite (TESS) in Sector 18 at a 2-min caden

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab799c9a1a178796ad36a78d978fdf2e
https://doi.org/10.3847/1538-4357/ac2d28