A search for nonthermal radio emission from OB and WR stars with RATAN-600

Raguzova, N.V.; Sidorenkov, V.N.

Авторы: Raguzova N.V., Sidorenkov V.N.
Журнал: Astronomy and Astrophysics
Том: 354
Год издания: 2000
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 551
Последняя страница: 556
Аннотация: We have searched for nonthermal radio emission from 40 OB and WR stars. Enhanced nonthermal radio emission from an early-type star could be evidence for the presence of a collapsed companion, and thus for its origin as the result of a supernova explosion in a massive binary. As shown in the evolutionary calculations of joint evolution of a neutron star and a normal star in binaries (Lipunov & Prokhorov 1987), a considerable fraction of neutron stars in binary systems having an optical companion must be in the ejector state. A neutron star in this state generates a relativistic wind like an isolated radio pulsar. Most ejectors in binary systems can not be identified as radio pulsars because of absorption of radiowaves in the stellar wind of the normal companion, but instead, they may appear as sources of high-energy quanta due to the synchrotron radiation of relativistic particles (ejected by the radio pulsar) in the magnetic field of a normal star (Lipunov & Prokhorov 1984; Lipunov & Nazin 1994). In this case a source of nonthermal radiation in a wide range from radio to hard gamma-ray may appear as a result of a specific reflection effect in the magnetic field of the optical companion. Cyg X-3 and the periodic radioburster LS I +610303 may be examples of just this kind. To test this idea, measurements of radio flux densities in the range from 0.96 to 21.7 GHz from selected OB and WR stars were made with the RATAN-600. No nonthermal radio emission from the selected stars were detected.
Добавил в систему: Рагузова Наталья Владимировна

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ИНХС РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ИНХС РАН

A search for nonthermal radio emission from OB and WR stars with RATAN-600статья

Прикрепленные файлы