Английская Википедия:HD 49434

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HD 49434 is a single star in the equatorial constellation of Monoceros. It is faintly visible to the naked eye with an apparent visual magnitude of 5.75.[1] Based on parallax measurements the star is located at a distance of 130.5 light years from the Sun,[2] but it is drifting closer with a radial velocity of −17 km/s.[3]

During a study with the ELODIE spectrograph from 1998 onwards it was found to show low amplitude variations of absorption line profiles, which is an indication of non-radial pulsations. It also displays a long period, low amplitude variation in luminosity, which together suggest it is a Gamma Doradus variable.[4] Observation of the star during the CoRoT mission showed ten pulsation frequencies, four of which are typical for Gamma Doradus variables and six higher frequencies that are characteristic of Delta Scuti variables. Hence it is classified as a hybrid pulsator.[5]

The spectrum of HD 49434 presents as an F-type main-sequence star with stellar classification of F1V.[5] It displays a high rotation rate with a projected rotational velocity of 86 km/s.[6] The star has 1.55 times the mass of the Sun and 1.60 times the Sun's radius.[7] It is radiating 7[1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,632 K.[7]

References

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Further reading

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  1. 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок Anderson_Francis_2012 не указан текст
  2. Ошибка цитирования Неверный тег <ref>; для сносок GaiaDR3 не указан текст
  3. Ошибка цитирования Неверный тег <ref>; для сносок Gontcharov_2006 не указан текст
  4. Ошибка цитирования Неверный тег <ref>; для сносок Bruntt_et_al_2002 не указан текст
  5. 5,0 5,1 Ошибка цитирования Неверный тег <ref>; для сносок Uytterhoeven_et_al_2008 не указан текст
  6. Ошибка цитирования Неверный тег <ref>; для сносок Ammler-von_Eiff_Reiners_2012 не указан текст
  7. 7,0 7,1 Ошибка цитирования Неверный тег <ref>; для сносок Sánchez_Arias_et_al_2017 не указан текст