Image of an Extrasolar World?

by | Apr 1, 2005 | Exoplanetary Science

Space.com is reporting that a European team led by Ralph Neuhaeuser of the Astrophysical Institute & University Observatory has obtained a photograph of an extrasolar planet around GQ Lupi, a young star about 400 light years from Earth. The image shows a faint object the team believes to orbit some 100 AU from its parent star, an apparently young and hot planet.

From the article:

The planet is about 3,140 degrees Fahrenheit (2000 Kelvin) — not the sort of place that would be expected to support life. Neuhaeuser’s team has also detected water in the planet’s atmosphere. The world is expected to be gaseous, like Jupiter. It is about twice the diameter of Jupiter. The mass estimate — one to two times that of Jupiter — is “somewhat uncertain,” Neuhaeuser said.

The planet is three times farther from GQ Lupi than Neptune is from our Sun. “We should expect that the planet orbits around the star, but at its large separation one orbital period [a year] is roughly 1,200 years, so that orbital motion is not yet detected.”

The two Spitzer Space Telescope detections earlier this month measured the change in light as a planet passed between its star and the Earth. The new photograph may be the first to show an extrasolar planet as an image. Another possible planetary image was released in September, although the star in question, 2M1207, is actually a brown dwarf and the detection has not been confirmed.

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In Centauri Dreams, Paul Gilster looks at peer-reviewed research on deep space exploration, with an eye toward interstellar possibilities. For many years this site coordinated its efforts with the Tau Zero Foundation. It now serves as an independent forum for deep space news and ideas. In the logo above, the leftmost star is Alpha Centauri, a triple system closer than any other star, and a primary target for early interstellar probes. To its right is Beta Centauri (not a part of the Alpha Centauri system), with Beta, Gamma, Delta and Epsilon Crucis, stars in the Southern Cross, visible at the far right (image courtesy of Marco Lorenzi).

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