A NEW SUB-STELLAR COMPANION AROUND THE YOUNG STAR HD 284149

Journal Article · Wed Aug 20 00:00:00 EDT 2014 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/791/2/L40· OSTI ID:22365248

Bonavita, Mariangela; Desidera, Silvano ^[1]; Daemgen, Sebastian; Jayawardhana, Ray ^[2]; Janson, Markus ^[3]; Lafrenière, David ^[4]

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1. INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova (Italy)
2. Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4 (Canada)
3. Astrophysics Research Centre, Queen's University Belfast, Belfast BT7 1NN (United Kingdom)
4. Department of Physics, University of Montreal, Montreal, QC H3T 1J4 (Canada)

Even though only a handful of sub-stellar companions have been found via direct imaging, each of these discoveries has had a tremendous impact on our understanding of the star formation process and the physics of cool atmospheres. Young stars are prime targets for direct imaging searches for planets and brown dwarfs due to the favorable brightness contrast expected at such ages and also because it is often possible to derive relatively good age estimates for these primaries. Here we present the direct imaging discovery of HD 284149 b, a 18-50 M {sub Jup} companion at a projected separation of 400 AU from a young (25{sub 10}{sup +25} Myr) F8 star, with which it shares common proper motion.

• OSTI ID: 22365248
• Journal Information: Astrophysical Journal Letters, Vol. 791, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
BRIGHTNESS
DWARF STARS
OPTICS
PLANETS
PROPER MOTION
STAR EVOLUTION