Spectroscopic Peculiarity of the Herbig Be Star HD 259431

Переведенное название: Спектроскопическая пекулярность звезды Ве Хербига HD 259431

M. Pogodin, S.E. Pavlovskij, Наталия Алексеевна Драке, N.G. Beskrovnaya, O.V. Kozlova, I.Yu. Alekseev, M. Borges Fernandes, C.B. Pereira, G. Valyavin

Результат исследований: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

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High-resolution spectra of the Herbig Be star HD 259431 obtained in 2010-2016 at three observatories (Crimean AO, ESO in Chile, and OAN SPN in Mexico) are analysed. The object demonstrates a very rich emission line profile spectrum. The bulk of the lines exhibit double-peaked emission profiles and originate in the gaseous disk. The atmospheric lines are unusually shallow, and majority of them are distorted by the circumstellar (CS) contribution. Moreover, we have revealed that they are overlapped with an additional continuum emission. Using the observed ratio of the equivalent widths of two He I λ 4009 and 4026 lines, we estimated the spectral type of the object as B5 V. We also constructed the spectral energy distribution of the additional continuum using wide wings of the atmospheric Hβ-Hɛ lines free of the CS contribution. The continuum corresponds to the blue part of the black body spectrum. The Hβ - Hɛ Balmer emission lines show very variable profiles looking as either of P Cyg-type or a double-peaked emission line with a depression of the red wing. We found the period of this variability P = 2.630d and interpreted it as a sign of a rotating magnetosphere of the star with the magnetic axis inclined to the rotation axis. At different phases of rotation, the observer can see either an accretion flow at high magnetic latitudes or a wind zone at lower latitudes. We also estimated the inclination of the rotation axis i = 52°±1°.
Переведенное названиеСпектроскопическая пекулярность звезды Ве Хербига HD 259431
Язык оригиналаанглийский
Название основной публикацииStars: From Collapse to Collapse
Подзаголовок основной публикацииProceedings of a conference held at Special Astrophysical Observatory, Nizhny Arkhyz, Russia 3-7 October 2016
РедакторыYu.Yu Balega, D.O. Kudryavtsev
Место публикацииSan Francisco
Число страниц5
ИзданиеAstronomical Society of the Pacific
СостояниеОпубликовано - 10 июн 2017
СобытиеStars: From Collapse to Collapse - Специальная Астрофизическая Обсерватория, Нижний Архыз, Российская Федерация
Продолжительность: 3 окт 20167 окт 2016


конференцияStars: From Collapse to Collapse
СтранаРоссийская Федерация
ГородНижний Архыз
Адрес в сети Интернет

Предметные области Scopus

  • Астрономия и астрофизика