Home » News & Blogs » An Ultra-Dense Transiting Brown Dwarf
Bookmark and Share
Beyond Earthly Skies

An Ultra-Dense Transiting Brown Dwarf

14 Jun 2016, 22:00 UTC
An Ultra-Dense Transiting Brown Dwarf
(200 words excerpt, click title or image to see full post)

Figure 1: Artist’s impression of what could be a brown dwarf in orbit around a main-sequence star.Bayliss et al. (2016) present the discovery of an ultra-dense brown dwarf in a 40.737 day orbit around its host star. This brown dwarf is identified as EPIC201702477b and it was first reported as a planet candidate based on two transit events observed by K2. Follow up observations, together with high precision radial velocity measurements, confirmed its nature as a brown dwarf. EPIC201702477b has 66.9 ± 1.7 times the mass and 0.757 ± 0.065 times the radius of Jupiter, giving it a remarkably high density of 191 ± 51 g/cm³, around ~25 times the density of iron.EPIC201702477b has the smallest known radius for any brown dwarf, and it is also denser than any planet, substellar mass object or main-sequence star discovered so far. The host star of EPIC201702477b has 0.870 ± 0.013 times the mass and 0.901 ± 0.057 times the radius of the Sun. Its effective temperature is 5517 ± 20 K, and its estimated age is 8.8 ± 4.1 billion years old. Currently, there are only 12 known brown dwarfs (i.e. objects with 13 to 80 times the mass of Jupiter) that ...

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day