Английская Википедия:AF Leporis

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AF Leporis, also known as HD 35850, is an F-type main-sequence star located Шаблон:Convert away from the Solar System in the constellation of Lepus. With an apparent magnitude of 6.3, it is near the limit of naked eye visibility under ideal conditions. While some studies consider it to be a close spectroscopic binary with a separation of Шаблон:Val, other studies show no evidence of binarity, and it is likely that the supposed binarity is an artifact resulting from the presence of starspots.

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A light curve for AF Leporis, plotted from TESS data

AF Leporis is a member of the Beta Pictoris moving group, with an astronomically young age of about 24 million years. It hosts a circumstellar disk and one known exoplanet. Шаблон:Clear left

Planetary system

In 2023, a gas giant exoplanet was discovered in orbit around AF Leporis by direct imaging using the NIRC2 instrument at the W. M. Keck Observatory and the SPHERE instrument at the Very Large Telescope. It was also detected in astrometric data from the Hipparcos and Gaia spacecraft, allowing an accurate measurement of its mass. Spectroscopic evidence suggests that AF Leporis b has a metal-rich atmosphere with silicate clouds.

There have been multiple studies of AF Leporis b, which have found somewhat different parameters. One study finds a dynamical mass of Шаблон:Val, somewhat lower than the predicted mass based on imaging, while another study instead finds Шаблон:Val, consistent with photometric mass estimates. The former study finds an orbital inclination of Шаблон:Val, consistent with the stellar inclination of Шаблон:Val and suggesting an aligned system, while the latter study instead finds an inclination of Шаблон:Val. All studies have found that the planet has a fairly eccentric orbit.

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Two images of AF Lep b with the SPHERE instrument on the Very Large Telescope

See also

• 51 Eridani
• Beta Pictoris