The TWA 3 Young Triple System: Orbits, Disks, Evolution
We have characterized the spectroscopic orbit of the TWA 3A binary and provide preliminary families of probable solutions for the TWA 3A visual orbit, as well as for the wide TWA 3A-B orbit. TWA 3 is a hierarchical triple located at 34 pc in the ∼10 Myr old TW Hya association. The wide component sep...
| Main Authors: | , , , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Published: |
IOP Publishing
2017
|
| Online Access: | http://hdl.handle.net/1721.1/112307 https://orcid.org/0000-0003-1327-1398 https://orcid.org/0000-0003-4772-528X |
| _version_ | 1826216637078962176 |
|---|---|
| author | Kellogg, Kendra Prato, L. Torres, Guillermo Schaefer, G. H. Avilez, I. Ruíz-Rodríguez, D. Wasserman, L. H. Bonanos, Alceste Z. Guenther, E. W. Neuhäuser, R. Morzinski, Katie M. Close, Laird Bailey, Vanessa Hinz, Phil Males, Jared R. Levine, Stephen E. Bosh, Amanda S. |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Kellogg, Kendra Prato, L. Torres, Guillermo Schaefer, G. H. Avilez, I. Ruíz-Rodríguez, D. Wasserman, L. H. Bonanos, Alceste Z. Guenther, E. W. Neuhäuser, R. Morzinski, Katie M. Close, Laird Bailey, Vanessa Hinz, Phil Males, Jared R. Levine, Stephen E. Bosh, Amanda S. |
| author_sort | Kellogg, Kendra |
| collection | MIT |
| description | We have characterized the spectroscopic orbit of the TWA 3A binary and provide preliminary families of probable solutions for the TWA 3A visual orbit, as well as for the wide TWA 3A-B orbit. TWA 3 is a hierarchical triple located at 34 pc in the ∼10 Myr old TW Hya association. The wide component separation is 1.″55; the close pair was first identified as a possible binary almost 20 years ago. We initially identified the 35-day period orbital solution using high-resolution infrared spectroscopy that angularly resolved the A and B components. We then refined the preliminary orbit by combining the infrared data with a reanalysis of our high-resolution optical spectroscopy. The orbital period from the combined spectroscopic solution is ∼35 days, the eccentricity is ∼0.63, and the mass ratio is ∼0.84; although this high mass ratio would suggest that optical spectroscopy alone should be sufficient to identify the orbital solution, the presence of the tertiary B component likely introduced confusion in the blended optical spectra. Using millimeter imaging from the literature, we also estimate the inclinations of the stellar orbital planes with respect to the TWA 3A circumbinary disk inclination and find that all three planes are likely misaligned by at least ∼30°. The TWA 3A spectroscopic binary components have spectral types of M4.0 and M4.5; TWA 3B is an M3. We speculate that the system formed as a triple, is bound, and that its properties were shaped by dynamical interactions between the inclined orbits and disk. |
| first_indexed | 2024-09-23T16:50:59Z |
| format | Article |
| id | mit-1721.1/112307 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:50:59Z |
| publishDate | 2017 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1123072022-10-03T08:42:09Z The TWA 3 Young Triple System: Orbits, Disks, Evolution Kellogg, Kendra Prato, L. Torres, Guillermo Schaefer, G. H. Avilez, I. Ruíz-Rodríguez, D. Wasserman, L. H. Bonanos, Alceste Z. Guenther, E. W. Neuhäuser, R. Morzinski, Katie M. Close, Laird Bailey, Vanessa Hinz, Phil Males, Jared R. Levine, Stephen E. Bosh, Amanda S. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Levine, Stephen E. Bosh, Amanda S. We have characterized the spectroscopic orbit of the TWA 3A binary and provide preliminary families of probable solutions for the TWA 3A visual orbit, as well as for the wide TWA 3A-B orbit. TWA 3 is a hierarchical triple located at 34 pc in the ∼10 Myr old TW Hya association. The wide component separation is 1.″55; the close pair was first identified as a possible binary almost 20 years ago. We initially identified the 35-day period orbital solution using high-resolution infrared spectroscopy that angularly resolved the A and B components. We then refined the preliminary orbit by combining the infrared data with a reanalysis of our high-resolution optical spectroscopy. The orbital period from the combined spectroscopic solution is ∼35 days, the eccentricity is ∼0.63, and the mass ratio is ∼0.84; although this high mass ratio would suggest that optical spectroscopy alone should be sufficient to identify the orbital solution, the presence of the tertiary B component likely introduced confusion in the blended optical spectra. Using millimeter imaging from the literature, we also estimate the inclinations of the stellar orbital planes with respect to the TWA 3A circumbinary disk inclination and find that all three planes are likely misaligned by at least ∼30°. The TWA 3A spectroscopic binary components have spectral types of M4.0 and M4.5; TWA 3B is an M3. We speculate that the system formed as a triple, is bound, and that its properties were shaped by dynamical interactions between the inclined orbits and disk. 2017-11-28T18:57:16Z 2017-11-28T18:57:16Z 2017-08 2017-06 2017-11-17T17:37:30Z Article http://purl.org/eprint/type/JournalArticle 1538-4357 0004-637X http://hdl.handle.net/1721.1/112307 Kellogg, Kendra, et al. “The TWA 3 Young Triple System: Orbits, Disks, Evolution.” The Astrophysical Journal, vol. 844, no. 2, Aug. 2017, p. 168. © 2017 The American Astronomical Society. https://orcid.org/0000-0003-1327-1398 https://orcid.org/0000-0003-4772-528X http://dx.doi.org/10.3847/1538-4357/aa7c60 The Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing IOP Publishing |
| spellingShingle | Kellogg, Kendra Prato, L. Torres, Guillermo Schaefer, G. H. Avilez, I. Ruíz-Rodríguez, D. Wasserman, L. H. Bonanos, Alceste Z. Guenther, E. W. Neuhäuser, R. Morzinski, Katie M. Close, Laird Bailey, Vanessa Hinz, Phil Males, Jared R. Levine, Stephen E. Bosh, Amanda S. The TWA 3 Young Triple System: Orbits, Disks, Evolution |
| title | The TWA 3 Young Triple System: Orbits, Disks, Evolution |
| title_full | The TWA 3 Young Triple System: Orbits, Disks, Evolution |
| title_fullStr | The TWA 3 Young Triple System: Orbits, Disks, Evolution |
| title_full_unstemmed | The TWA 3 Young Triple System: Orbits, Disks, Evolution |
| title_short | The TWA 3 Young Triple System: Orbits, Disks, Evolution |
| title_sort | twa 3 young triple system orbits disks evolution |
| url | http://hdl.handle.net/1721.1/112307 https://orcid.org/0000-0003-1327-1398 https://orcid.org/0000-0003-4772-528X |
| work_keys_str_mv | AT kelloggkendra thetwa3youngtriplesystemorbitsdisksevolution AT pratol thetwa3youngtriplesystemorbitsdisksevolution AT torresguillermo thetwa3youngtriplesystemorbitsdisksevolution AT schaefergh thetwa3youngtriplesystemorbitsdisksevolution AT avilezi thetwa3youngtriplesystemorbitsdisksevolution AT ruizrodriguezd thetwa3youngtriplesystemorbitsdisksevolution AT wassermanlh thetwa3youngtriplesystemorbitsdisksevolution AT bonanosalcestez thetwa3youngtriplesystemorbitsdisksevolution AT guentherew thetwa3youngtriplesystemorbitsdisksevolution AT neuhauserr thetwa3youngtriplesystemorbitsdisksevolution AT morzinskikatiem thetwa3youngtriplesystemorbitsdisksevolution AT closelaird thetwa3youngtriplesystemorbitsdisksevolution AT baileyvanessa thetwa3youngtriplesystemorbitsdisksevolution AT hinzphil thetwa3youngtriplesystemorbitsdisksevolution AT malesjaredr thetwa3youngtriplesystemorbitsdisksevolution AT levinestephene thetwa3youngtriplesystemorbitsdisksevolution AT boshamandas thetwa3youngtriplesystemorbitsdisksevolution AT kelloggkendra twa3youngtriplesystemorbitsdisksevolution AT pratol twa3youngtriplesystemorbitsdisksevolution AT torresguillermo twa3youngtriplesystemorbitsdisksevolution AT schaefergh twa3youngtriplesystemorbitsdisksevolution AT avilezi twa3youngtriplesystemorbitsdisksevolution AT ruizrodriguezd twa3youngtriplesystemorbitsdisksevolution AT wassermanlh twa3youngtriplesystemorbitsdisksevolution AT bonanosalcestez twa3youngtriplesystemorbitsdisksevolution AT guentherew twa3youngtriplesystemorbitsdisksevolution AT neuhauserr twa3youngtriplesystemorbitsdisksevolution AT morzinskikatiem twa3youngtriplesystemorbitsdisksevolution AT closelaird twa3youngtriplesystemorbitsdisksevolution AT baileyvanessa twa3youngtriplesystemorbitsdisksevolution AT hinzphil twa3youngtriplesystemorbitsdisksevolution AT malesjaredr twa3youngtriplesystemorbitsdisksevolution AT levinestephene twa3youngtriplesystemorbitsdisksevolution AT boshamandas twa3youngtriplesystemorbitsdisksevolution |