New Extinction and Mass Estimates of the Low-mass Companion 1RXS 1609 B with the Magellan AO System: Evidence of an Inclined Dust Disk
Abstract
We used the Magellan adaptive optics system to image the 11 Myr substellar companion 1RXS 1609 B at the bluest wavelengths to date (z‧ and Ys). Comparison with synthetic spectra yields a higher temperature than previous studies of {T}{eff}=2000+/- 100 {{K}} and significant dust extinction of {A}V={4.5}-0.7+0.5 mag. Mass estimates based on the DUSTY tracks gives 0.012-0.015 {M}⊙ , making the companion likely a low-mass brown dwarf surrounded by a dusty disk. Our study suggests that 1RXS 1609 B is one of the ∼25% of Upper Scorpius low-mass members harboring disks, and it may have formed like a star and not a planet out at ∼320 AU.
This paper includes data gathered with the 6.5 m Magellan Clay Telescope at Las Campanas Observatory, Chile.- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 2015
- DOI:
- 10.1088/2041-8205/807/1/L13
- arXiv:
- arXiv:1506.05816
- Bibcode:
- 2015ApJ...807L..13W
- Keywords:
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- brown dwarfs;
- instrumentation: adaptive optics;
- planetary systems;
- planets and satellites: individual: 1RXS 160929.1‑210524 B;
- stars: individual: 1RXS 160929.1‑210524;
- stars: pre-main sequence;
- Astrophysics - Earth and Planetary Astrophysics;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 5 pages, 4 figures