RESOLVED SPECTROSCOPY OF M DWARF/L DWARF BINARIES. III. THE "WIDE" L3.5/L4 DWARF BINARY 2MASS J15500845+1455180AB
We report the identification of 2MASS J15500845+1455180 as a 0farcs9 L dwarf visual binary. This source is resolved in Sloan Digital Sky Survey (SDSS) images and in near-infrared imaging with the Infrared Telescope Facility SpeX imager/spectrometer. The two components, oriented along a north-south a...
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| Language: | en_US |
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Institute of Physics Publishing
2010
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| Online Access: | http://hdl.handle.net/1721.1/52607 |
| _version_ | 1826197460702199808 |
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| author | Burgasser, Adam J. Dhital, Saurav West, A. A. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Burgasser, Adam J. Dhital, Saurav West, A. A. |
| author_sort | Burgasser, Adam J. |
| collection | MIT |
| description | We report the identification of 2MASS J15500845+1455180 as a 0farcs9 L dwarf visual binary. This source is resolved in Sloan Digital Sky Survey (SDSS) images and in near-infrared imaging with the Infrared Telescope Facility SpeX imager/spectrometer. The two components, oriented along a north-south axis, have similar brightnesses in the near-infrared (ΔK ≈ 0.2 mag), although the fainter northern component is redder in J–K color. Resolved near-infrared spectroscopy indicates spectral types of L3.5 and L4, consistent with its L3 combined-light optical classification based on the SDSS data. Physical association is confirmed through common proper motion, common spectrophotometric distances and low probability of chance alignment. The projected physical separation of 2MASS J1550+1455AB, 30 ± 3 AU at an estimated distance of 33 ± 3 pc, makes it the widest L dwarf-L dwarf pair identified to date, although such a separation is not unusual among very low mass field binaries. The angular separation and spectral composition of this system makes it an excellent target for obtaining a precise lithium depletion age and a potential age standard for low-temperature atmosphere studies. |
| first_indexed | 2024-09-23T10:48:01Z |
| format | Article |
| id | mit-1721.1/52607 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:48:01Z |
| publishDate | 2010 |
| publisher | Institute of Physics Publishing |
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| spelling | mit-1721.1/526072022-09-27T15:04:45Z RESOLVED SPECTROSCOPY OF M DWARF/L DWARF BINARIES. III. THE "WIDE" L3.5/L4 DWARF BINARY 2MASS J15500845+1455180AB Burgasser, Adam J. Dhital, Saurav West, A. A. Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Burgasser, Adam J. Burgasser, Adam J. West, Andrew A. We report the identification of 2MASS J15500845+1455180 as a 0farcs9 L dwarf visual binary. This source is resolved in Sloan Digital Sky Survey (SDSS) images and in near-infrared imaging with the Infrared Telescope Facility SpeX imager/spectrometer. The two components, oriented along a north-south axis, have similar brightnesses in the near-infrared (ΔK ≈ 0.2 mag), although the fainter northern component is redder in J–K color. Resolved near-infrared spectroscopy indicates spectral types of L3.5 and L4, consistent with its L3 combined-light optical classification based on the SDSS data. Physical association is confirmed through common proper motion, common spectrophotometric distances and low probability of chance alignment. The projected physical separation of 2MASS J1550+1455AB, 30 ± 3 AU at an estimated distance of 33 ± 3 pc, makes it the widest L dwarf-L dwarf pair identified to date, although such a separation is not unusual among very low mass field binaries. The angular separation and spectral composition of this system makes it an excellent target for obtaining a precise lithium depletion age and a potential age standard for low-temperature atmosphere studies. 2010-03-16T12:45:30Z 2010-03-16T12:45:30Z 2009-12 2009-08 Article http://purl.org/eprint/type/SubmittedJournalArticle 0004-6256 http://hdl.handle.net/1721.1/52607 Adam J. Burgasser et al 2009 The Astronomical Journal 138 1563 doi: 10.1088/0004-6256/138/6/1563 en_US http://dx.doi.org/10.1088/0004-6256/138/6/1563 The Astronomical Journal Attribution-Noncommercial-Share Alike 3.0 Unported http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf Institute of Physics Publishing author/dept web page |
| spellingShingle | Burgasser, Adam J. Dhital, Saurav West, A. A. RESOLVED SPECTROSCOPY OF M DWARF/L DWARF BINARIES. III. THE "WIDE" L3.5/L4 DWARF BINARY 2MASS J15500845+1455180AB |
| title | RESOLVED SPECTROSCOPY OF M DWARF/L DWARF BINARIES. III. THE "WIDE" L3.5/L4 DWARF BINARY 2MASS J15500845+1455180AB |
| title_full | RESOLVED SPECTROSCOPY OF M DWARF/L DWARF BINARIES. III. THE "WIDE" L3.5/L4 DWARF BINARY 2MASS J15500845+1455180AB |
| title_fullStr | RESOLVED SPECTROSCOPY OF M DWARF/L DWARF BINARIES. III. THE "WIDE" L3.5/L4 DWARF BINARY 2MASS J15500845+1455180AB |
| title_full_unstemmed | RESOLVED SPECTROSCOPY OF M DWARF/L DWARF BINARIES. III. THE "WIDE" L3.5/L4 DWARF BINARY 2MASS J15500845+1455180AB |
| title_short | RESOLVED SPECTROSCOPY OF M DWARF/L DWARF BINARIES. III. THE "WIDE" L3.5/L4 DWARF BINARY 2MASS J15500845+1455180AB |
| title_sort | resolved spectroscopy of m dwarf l dwarf binaries iii the wide l3 5 l4 dwarf binary 2mass j15500845 1455180ab |
| url | http://hdl.handle.net/1721.1/52607 |
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