* Astronomy

Blobrana · L

RE: HD 102272

Blobrana · L

A team of astronomers from Penn State and Nicolaus Copernicus University in Poland has discovered a new planet that is closely orbiting a red-giant star, HD 102272, which is much more evolved than our own Sun. The planet has a mass that is nearly six times that of Jupiter, the largest planet in our solar system. The team includes Alexander Wolszczan, the discoverer of the first planets ever found outside our solar system, who is an Evan Pugh professor of astronomy and astrophysics and the director of the Center for Exoplanets and Habitable Worlds at Penn State; and Andrzej Niedzielski, who leads his collaborators in Poland. The team suspects that a second planet may be orbiting HD 102272, as well. The findings, which will be published in a future issue of the Astrophysical Journal, shed light on the ways in which aging stars can influence nearby planets.

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Blobrana · L

A planet outside of the solar system has been discovered orbiting a dying, puffed-up star called a red giant.
The finding could help astronomers learn more about the fate of our solar system.
The newly discovered exoplanet is nearly six times the mass of Jupiter and orbits the red giant star HD 102272, which is located 1,200 light-years away in the constellation Leo. To date, about 20 red giants are known to support planets.

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Blobrana · L

A team of astronomers led by Dr. Andrzej Niedzielski from Nicolaus Copernicus University in Torun have discovered a new planet orbiting another star. It may well be that one more planet exists in the vicinity of the star in question.
The newly-discovered planet has a mass 5.9 that of Jupiter and orbits HD 102272 star. Most probably it is not the only planet in the system. The system probably harbours another planet at 2.6 Jovian mass. In this way, the system becomes one of the 28 known multiplanetary systems.

Source

Blobrana · L

A team of astronomers from Penn State and Nicolaus Copernicus University in Poland has discovered a new planet that is closely orbiting a red-giant star, HD 102272, which is much older than our own Sun. The planet has a mass that is nearly six times that of Jupiter, the largest planet in our solar system.
The team includes Alexander Wolszczan, the discoverer of the first planets ever found outside our solar system, who is an Evan Pugh Professor of Astronomy and Astrophysics and the director of the Center for Exoplanets and Habitable Worlds at Penn State; and Andrzej Niedzielski, who leads his collaborators in Poland. The team suspects that a second planet may be orbiting HD 102272, as well.
The findings, which will be published in a future issue of The Astrophysical Journal, shed light on the ways in which aging stars can influence nearby planets.

Source Penn State University

Blobrana · L

Title: A Planet in a 0.6-AU Orbit Around the K0 Giant HD 102272
Authors: A. Niedzielski, K. Go\' zdziewski, A. Wolszczan, M. Konacki, G. Nowak, P. Zieliski

We report the discovery of one or more planet-mass companions to the K0-giant HD 102272 with the Hobby-Eberly Telescope. In the absence of any correlation of the observed periodicities with the standard indicators of stellar activity, the observed radial velocity variations are most plausibly explained in terms of a Keplerian motion of at least one planet-mass body around the star. With the estimated stellar mass of 1.9 solar masses, the minimum mass of the confirmed planet is 5.9 Jupiter masses. The planet's orbit is characterized by a small but nonzero eccentricity of e=0.05 and the semi-major axis of 0.61 AU, which makes it the most compact one discovered so far around GK-giants. This detection adds to the existing evidence that, as predicted by theory, the minimum size of planetary orbits around intermediate-mass giants is affected by both planet formation processes and stellar evolution. The currently available evidence for another planet around HD 102272 is insufficient to obtain an unambiguous two-orbit solution.

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