Fire spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: Kinematics, rotation and atmospheric parameters
We present λ/Δλ ~ 6000 near-infrared spectroscopy of the nearby T9 dwarf, UGPS J072227.51–054031.2, obtained during the commissioning of the Folded-Port Infrared Echellette Spectrograph on the Baade Magellan telescope at Las Campanas Observatory. The spectrum is marked by significant absorption from...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2013
|
| Online Access: | http://hdl.handle.net/1721.1/76694 https://orcid.org/0000-0003-3769-9559 |
| _version_ | 1826204907222335488 |
|---|---|
| author | Bochanski, John J. Burgasser, Adam J. Simcoe, Robert A. West, Andrew A. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Bochanski, John J. Burgasser, Adam J. Simcoe, Robert A. West, Andrew A. |
| author_sort | Bochanski, John J. |
| collection | MIT |
| description | We present λ/Δλ ~ 6000 near-infrared spectroscopy of the nearby T9 dwarf, UGPS J072227.51–054031.2, obtained during the commissioning of the Folded-Port Infrared Echellette Spectrograph on the Baade Magellan telescope at Las Campanas Observatory. The spectrum is marked by significant absorption from H[subscript 2]O, CH[subscript 4], and H[subscript 2]. We also identify NH[subscript 3] absorption features by comparing the spectrum to recently published line lists. The spectrum is fit with BT-Settl models, indicating T [subscript eff] ~500-600 K and log g ~4.3-5.0. This corresponds to a mass of ~10-30 M {subscript Jup] and an age of 1-5 Gyr, however, there are large discrepancies between the model and observed spectrum. The radial and rotational velocities of the brown dwarf are measured as 46.9 ± 2.5 and 40 ± 10 km s[superscript –1], respectively, reflecting a thin disk Galactic orbit and fast rotation similar to other T dwarfs, suggesting a young, possibly planetary-mass brown dwarf. |
| first_indexed | 2024-09-23T13:02:56Z |
| format | Article |
| id | mit-1721.1/76694 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:02:56Z |
| publishDate | 2013 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/766942022-10-01T12:46:19Z Fire spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: Kinematics, rotation and atmospheric parameters Bochanski, John J. Burgasser, Adam J. Simcoe, Robert A. West, Andrew A. Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Bochanski, John J. Burgasser, Adam J. Simcoe, Robert A. We present λ/Δλ ~ 6000 near-infrared spectroscopy of the nearby T9 dwarf, UGPS J072227.51–054031.2, obtained during the commissioning of the Folded-Port Infrared Echellette Spectrograph on the Baade Magellan telescope at Las Campanas Observatory. The spectrum is marked by significant absorption from H[subscript 2]O, CH[subscript 4], and H[subscript 2]. We also identify NH[subscript 3] absorption features by comparing the spectrum to recently published line lists. The spectrum is fit with BT-Settl models, indicating T [subscript eff] ~500-600 K and log g ~4.3-5.0. This corresponds to a mass of ~10-30 M {subscript Jup] and an age of 1-5 Gyr, however, there are large discrepancies between the model and observed spectrum. The radial and rotational velocities of the brown dwarf are measured as 46.9 ± 2.5 and 40 ± 10 km s[superscript –1], respectively, reflecting a thin disk Galactic orbit and fast rotation similar to other T dwarfs, suggesting a young, possibly planetary-mass brown dwarf. National Science Foundation (U.S.) (Grant AST-0544588) 2013-01-30T21:36:30Z 2013-01-30T21:36:30Z 2011-10 2011-07 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/76694 Bochanski, John J. et al. “FIRE SPECTROSCOPY OF THE ULTRA-COOL BROWN DWARF, UGPS J072227.51–054031.2: KINEMATICS, ROTATION AND ATMOSPHERIC PARAMETERS.” The Astronomical Journal 142.5 (2011): 169. https://orcid.org/0000-0003-3769-9559 en_US http://dx.doi.org/10.1088/0004-6256/142/5/169 Astrophysical Journal Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf IOP Publishing arXiv |
| spellingShingle | Bochanski, John J. Burgasser, Adam J. Simcoe, Robert A. West, Andrew A. Fire spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: Kinematics, rotation and atmospheric parameters |
| title | Fire spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: Kinematics, rotation and atmospheric parameters |
| title_full | Fire spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: Kinematics, rotation and atmospheric parameters |
| title_fullStr | Fire spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: Kinematics, rotation and atmospheric parameters |
| title_full_unstemmed | Fire spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: Kinematics, rotation and atmospheric parameters |
| title_short | Fire spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: Kinematics, rotation and atmospheric parameters |
| title_sort | fire spectroscopy of the ultra cool brown dwarf ugps j072227 51 054031 2 kinematics rotation and atmospheric parameters |
| url | http://hdl.handle.net/1721.1/76694 https://orcid.org/0000-0003-3769-9559 |
| work_keys_str_mv | AT bochanskijohnj firespectroscopyoftheultracoolbrowndwarfugpsj072227510540312kinematicsrotationandatmosphericparameters AT burgasseradamj firespectroscopyoftheultracoolbrowndwarfugpsj072227510540312kinematicsrotationandatmosphericparameters AT simcoeroberta firespectroscopyoftheultracoolbrowndwarfugpsj072227510540312kinematicsrotationandatmosphericparameters AT westandrewa firespectroscopyoftheultracoolbrowndwarfugpsj072227510540312kinematicsrotationandatmosphericparameters |