Washington, April 10 ( ANI ): Thanks to the sensitive far-infrared detection capabilities of the ESA's Herschel space observatory, astronomers have been able to obtain the first images of a dust belt - produced by colliding comets or asteroids - orbiting a subgiant star known to host a planetary system.
They swell to become subgiant stars, before later becoming red giants.
These stars are just past the main stage of their life -- hence, "retired" -- and are now puffing up into what's called a subgiant star
In the southeast corner of the constellation, the 6th-magnitude yellow subgiant star
Rho (?) Indi, some 90 light-years from us, has a Jupiter-type planet orbiting it every 3.7 years
These stars are just past the main stage of their life hence, "retired", and are now puffing up into what's called a subgiant star
That honor goes to the "hot Saturn" closely circling the subgiant star
HD 149026 in Hercules.
GRO J1655-40 consists of a 5-solar-mass black hole and a 17th-magnitude F-type subgiant star
that orbit one another every 2.6 days.
Detections in the bright (2.7-magnitude) subgiant star
Eta Bootis appear to be convincing, and the results have been carefully compared with the star's physical parameters obtained from Hipparcos.
Delta 1 and 2 are both blue-white B-type subgiant stars
with Delta 1, slightly brighter, at approximately 800 light years from Earth and Delta 2 at 1 100 light years distant.
The astronomers conclude that eventually the subgiant stars
will grow into red giants, throwing off their outer atmospheres, swelling to the point where they could engulf the inner planet of their dancing pair.