WISE 1506 + 7027
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Brown dwarf WISEPC J150649.97 + 702736.0 |
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| Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Little Bear | ||
| Right ascension | 15 h 06 m 49.89 s | ||
| declination | + 70 ° 27 ′ 36.2 ″ | ||
| parallax | 193.55 ± 0.94 mas | ||
| distance | 16.85 ± 0.08 ly (5.17 ± 0.03 pc ) |
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| Typing | |||
| Spectral class | T6 | ||
| Physical Properties | |||
| Other names and catalog entries |
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WISEPC J150649.97 + 702736.0 (abbreviated name WISE 1506 + 7027 or WISE J1506 + 7027 ) is a brown dwarf of the spectral class T6 in the constellation Little Bear . About 17 light years from Earth, it is one of the Sun's closest neighbors . Brown dwarfs even closer to the Sun are Luhman 16 and WISE 0855-0714 . Other brown dwarfs that are in close proximity to the Sun are Epsilon Indi Ba and Bb and WISE 0350-5658 .
discovery
WISE 1506 + 7027 was discovered in 2011 in the data collected by the Space Telescope Wide-field Infrared Survey Explorer (WISE), whose mission lasted from December 2009 to February 2011, in the infrared at a wavelength of 40 cm. In 2011, J. Davy Kirkpatrick and his colleagues published a scientific publication in the Astrophysical Journal Supplement in which they announced the discovery of 98 systems of brown dwarfs newly discovered by WISE with components of the spectral classes M, L, T and Y, including WISE 1506 + 7027.
distance
The trigonometric parallax WISE 1506 + 7027, published in 2013 by Marsh et al., Is 0.310 ± 0.042 arcsec , corresponding to a distance of 3.4 Parsecs or 11.1 light years. The photometric distance estimate published in 2011 showed a distance of 4.9 parsecs or 16 light years for WISE 1506 + 7027. The astrometry satellite Gaia measured parallax to be 0.19355 ± 0.00094 arcsec.
Determination of the distance for WISE 1506 + 7027
| source | Parallax (mas) | Distance (pc) | Distance (Lj) |
|---|---|---|---|
| Kirkpatrick et al. (2011) (Table 6) | ~ 4.9 | ~ 16 | |
| Marsh et al. (2013) (according to Kirkpatrick et al. (2012)) |
193 ± 26 | 5.2 +0.8−0.6 | 16.9 +2.6−2.0 |
| Marsh et al. (2013) | 310 ± 42 | 3.4 +0.7−0.4 | 11.1 +2.3−1.3 |
| Gaia DR2 (2018) | 193.55 ± 0.94 | 5.17 ± 0.03 | 16.85 ± 0.08 |
The most precise determination is marked in bold .
Spatial movement
WISE 1506 + 7027 has a high intrinsic movement of over 1586 milli-arcseconds per year.
Determination of the proper movement for WISE 1506 + 7027
| source | μ (mas / year) | P ( ° ) | μ α (mas / year) | μ δ (mas / year) |
|---|---|---|---|---|
| Kirkpatrick et al. (2011) | 1388 ± 128 | 314.1 ± 5.3 | −996 ± 75 | 966 ± 107 |
| Marsh et al. (2013) | 1623 ± 106 | 310.1 ± 3.7 | −1241 ± 85 | 1046 ± 64 |
| Gaia DR2 (2018) | 1586.3 ± 1.9 | 311.17 ± 0.04 | −1194.1 ± 1.6 | 1044.3 ± 1.5 |
The most precise determinations are marked in bold . Calculated values are in italics, values that are specified in the sources are not in italics.
Individual evidence
- ↑ a b c d Gaia Collaboration. Gaia DR2 https://gea.esac.esa.int/archive/ Retrieved May 9, 2018
- ↑ a b c d e f g J. Davy Kirkpatrick, Michael C. Cushing, Christopher R. Gelino, Roger L. Griffith, Michael F. Skrutskie, Kenneth A. Marsh, Edward L. Wright, Amanda K. Mainzer, Peter R Eisenhardt, Ian S. McLean, Maggie A. Thompson, James M. Bauer, Dominic J. Benford, Carrie R. Bridge, Sean E. Lake, Sara M. Petty, S. Adam Stanford, Chao-Wei Tsai, Vanessa Bailey , Charles A. Beichman, John J. Bochanski, Adam J. Burgasser, Peter L. Capak, Kelle L. Cruz, Philip M. Hinz, Jeyhan S. Kartaltepe, Russell P. Knox, Swarnima Manohar, Daniel Masters, Maria Morales- Calderon, Lisa A. Prato, Timothy J. Rodigas, Mara Salvato, Steven D. Schurr, Nicholas Z. Scoville, Robert A. Simcoe, Karl R. Stapelfeldt, Daniel Stern, Nathan D. Stock, William D. Vacca: The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE) . arxiv : 1108.4677 .
- ↑ a b J. Davy Kirkpatrick, Christopher R. Gelino, Michael C. Cushing, Gregory N. Mace, Roger L. Griffith, Michael F. Skrutskie, Kenneth A. Marsh, Edward L. Wright, Peter R. Eisenhardt, Ian S. McLean, Amanda K. Mainzer, Adam J. Burgasser, CGTinney, Stephen Parker, Graeme Salter: Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function . arxiv : 1205.2122 .
- ↑ a b c d Kenneth A. Marsh, Edward L. Wright, J. Davy Kirkpatrick, Christopher R. Gelino, Michael C. Cushing, Roger L. Griffith, Michael F. Skrutskie, Peter R. Eisenhardt: Parallaxes and Proper Motions of ultra Cool Brown Dwarfs of spectral type Y and Late T . arxiv : 1211.6977 .