Английская Википедия:HD 134060
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HD 134060, also known by its Gould designation of 38 G. Circini, is a star in the southern constellation of Circinus. It is near the lower limit of stars visible to the naked eye, having an apparent visual magnitude of 6.29.[1] The distance to HD 134060, as determined using an annual parallax shift measurement of Шаблон:Val,[2] is 78.4 light years. It is moving further away with a heliocentric radial velocity of 43.5 km/s, having come within Шаблон:Convert some 439,000 years ago.[3]
During the NStars project, Grey et al. (2006) found a stellar classification of Шаблон:Nowrap for this star,[4] matching a Sun-like G-type main-sequence star with an overabundance of iron in its outer atmosphere. However, an older classification of G3 IV[1] is still used, which would suggest it is instead a more evolved subgiant star. HD 134060 has an estimated 1.07 times the mass of the Sun and 1.15 times the Sun's radius.[1] It is radiating 1.63[3] times the Sun's luminosity from its photosphere at an effective temperature of about 5,965 K.[1]
The survey in 2015 have ruled out the existence of any additional stellar companions at projected distances from 22 to 163 astronomical units.[5]
Planetary system
Based upon an 8-year survey using the HARPS spectrograph at La Silla Observatory, in 2011 the detection of a pair of planets orbiting this star were announced. The inner planet, HD 134060 b, is in a tight, eccentric orbit around the star with a period of just over three days. The second object, HD 134060 c, has a more leisurely period of around Шаблон:Convert and a high orbital eccentricity.[6]
The star was observed for a few hours by the Spitzer Space Telescope in the hopes of observing a transit by the inner planet, but none was detected.[1] HD 134060 displays an infrared excess at a wavelength of 18μm, making it a warm debris disk candidate.[7]
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References
External links
- ↑ 1,0 1,1 1,2 1,3 1,4 Ошибка цитирования Неверный тег
<ref>; для сносокGillon2017не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокdr1не указан текст - ↑ 3,0 3,1 Ошибка цитирования Неверный тег
<ref>; для сносокAnderson2012не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGray2006не указан текст - ↑ Шаблон:Cite journal
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокMayor2011не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокIshihara2017не указан текст
- Английская Википедия
- G-type main-sequence stars
- Planetary systems with two confirmed planets
- Circinus
- Durchmusterung objects
- Gould objects
- Henry Draper Catalogue objects
- Hipparcos objects
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