Unstable Phenomena in Stable Magnetospheres: Searching for Radio Flares from Magnetic OBA Stars Using VCSS

Autor: Emil Polisensky, Barnali Das, Wendy Peters, Matt E. Shultz, Eugene Semenko, Tracy E. Clarke

Publikováno v: The Astrophysical Journal, Vol 958, Iss 2, p 152 (2023)

Although the majority of hot magnetic stars have extremely stable, ∼kilogauss strength surface magnetic fields with simple topologies, a subset undergoes small-scale explosions due to centrifugal breakout. The resulting small-scale flares are typic

Externí odkaz: https://doaj.org/article/60face89c6a24730ad63f64bcc95a42d

Magnetic field of chemically peculiar stars in the Orion OB1 Association

Autor: Iosif Ivanovich Romanyuk, Eugene Semenko, Anastasiya Moiseeva, Ilya Yakunin, Dmitry Kudryavtsev

Publikováno v: Proceedings of The Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022).

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::27d01cce514c4401a2c3271554a36f9b
https://doi.org/10.22323/1.425.0051

Deep Contrast and Companion Detection Using the EvWaCo Testbed Equipped with an Achromatic Focal Plane Mask and an Adjustable Inner Working Angle

Autor: Auychai Laoyang, Suchinno Kanthum, Teerawat Kuha, Anuphong Inpan, Anthony Berdeu, Adithep Kawinkij, Maud Langlois, Apirat Prasit, Apichat Leckngam, Michel Tallon, David Mkrtichian, Boonrucksar Soonthornthum, Eugene Semenko, Supachai Awiphan, Mary Angelie Alagao, Pakakaew Rittipruk, Worawat Somboonchai, Christophe Buisset, Thierry Lépine, Eric Thiébaut, Saran Poshyachinda, Griangsak Thuammasorn, Yves Rabbia, Pimol Kaewsamoeta

Publikováno v: The Astronomical Journal
The Astronomical Journal, American Astronomical Society, 2021, 161 (5), pp.208. ⟨10.3847/1538-3881/abe709⟩
The Astronomical Journal, 2021, 161 (5), pp.208. ⟨10.3847/1538-3881/abe709⟩

The evanescent wave coronagraph uses the principle of frustrated total internal reflection (FTIR) to suppress the light coming from the star and study its close environment. Its focal plane mask is composed of a lens and a prism placed in contact wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1aea319b9fb922b7d28c3b8836bafbcc
http://arxiv.org/abs/2103.10044

Stars with Discrepant v sin i as Derived from the Ca II 3933 and Mg II 4481 Å Lines. VII. HD9531 (SB), HD31592 (SB2), HD129174 (SB?)

Autor: I. I. Romanyuk, Eugene Semenko, D. O. Kudryavtsev, I. Stateva, I. Iliev, Juraj Zverko

Publikováno v: Astrophysical Bulletin. 73:351-362

In this paper of the series we analyze three stars listed among stars with discrepant v sin i: HD9531 and HD31592, which also show radial velocity variations inherent to spectroscopic binaries, and HD129174 which is an Mn-type star with a possible ma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c83d7cf7b92ef669f8a32cfaa17c0f27
https://doi.org/10.1134/s1990341318030094

HD 965: An extremely peculiar A star with an extremely long rotation period

Autor: Gautier Mathys, Markus Schöller, D. O. Kudryavtsev, Swetlana Hubrig, Eugene Semenko, I. I. Romanyuk, I. A. Yakunin

Context. One of the keys to understanding the origin of the Ap stars and their significance in the general context of stellar astrophysics is the consideration of the most extreme properties displayed by some of them. In that context, HD 965 is parti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fc0e64472a3aca7c5c4c7f2d4f3fa90