Abstract
I am using multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to search for new members of the solar neighborhood via their high proper motions. Through this work, I have identified WISE J104915.57-531906.1 as a high proper motion object and have found additional detections in images from the Digitized Sky Survey, the Two Micron All-Sky Survey, and the Deep Near-Infrared Survey of the Southern Sky. I have measured a parallax of 0.″496 ± 0.″037 (2.0 ± 0.15 pc) from the astrometry in these surveys, making WISE J104915.57-531906.1 the third closest system to the Sun. During spectroscopic observations with the Gemini Multi-Object Spectrograph at Gemini Observatory, an i-band acquisition image resolved it as a 1.″5 (3 AU) binary. A spectrum was collected for the primary, which I classify as L8 ± 1. The secondary is probably near the L/T transition as well given that it is only modestly fainter than the primary (Δi = 0.45 mag).
| Original language | English (US) |
|---|---|
| Article number | L1 |
| Journal | Astrophysical Journal Letters |
| Volume | 767 |
| Issue number | 1 |
| DOIs | |
| State | Published - Apr 10 2013 |
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All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
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Discovery of a binary brown dwarf at 2 pc from the sun. / Luhman, K. L.
In: Astrophysical Journal Letters, Vol. 767, No. 1, L1, 10.04.2013.Research output: Contribution to journal › Article
TY - JOUR
T1 - Discovery of a binary brown dwarf at 2 pc from the sun
AU - Luhman, K. L.
PY - 2013/4/10
Y1 - 2013/4/10
N2 - I am using multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to search for new members of the solar neighborhood via their high proper motions. Through this work, I have identified WISE J104915.57-531906.1 as a high proper motion object and have found additional detections in images from the Digitized Sky Survey, the Two Micron All-Sky Survey, and the Deep Near-Infrared Survey of the Southern Sky. I have measured a parallax of 0.″496 ± 0.″037 (2.0 ± 0.15 pc) from the astrometry in these surveys, making WISE J104915.57-531906.1 the third closest system to the Sun. During spectroscopic observations with the Gemini Multi-Object Spectrograph at Gemini Observatory, an i-band acquisition image resolved it as a 1.″5 (3 AU) binary. A spectrum was collected for the primary, which I classify as L8 ± 1. The secondary is probably near the L/T transition as well given that it is only modestly fainter than the primary (Δi = 0.45 mag).
AB - I am using multi-epoch astrometry from the Wide-field Infrared Survey Explorer (WISE) to search for new members of the solar neighborhood via their high proper motions. Through this work, I have identified WISE J104915.57-531906.1 as a high proper motion object and have found additional detections in images from the Digitized Sky Survey, the Two Micron All-Sky Survey, and the Deep Near-Infrared Survey of the Southern Sky. I have measured a parallax of 0.″496 ± 0.″037 (2.0 ± 0.15 pc) from the astrometry in these surveys, making WISE J104915.57-531906.1 the third closest system to the Sun. During spectroscopic observations with the Gemini Multi-Object Spectrograph at Gemini Observatory, an i-band acquisition image resolved it as a 1.″5 (3 AU) binary. A spectrum was collected for the primary, which I classify as L8 ± 1. The secondary is probably near the L/T transition as well given that it is only modestly fainter than the primary (Δi = 0.45 mag).
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U2 - 10.1088/2041-8205/767/1/L1
DO - 10.1088/2041-8205/767/1/L1
M3 - Article
AN - SCOPUS:84875777266
VL - 767
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - L1
ER -