GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB
We explore the possibility that GSC 07396-00759 (spectral type M1e) is a widely separated (~2[' over .]82, or projected separation ~12,350 AU) companion to the "old" (age ~12 Myr) classical T Tauri binary system V4046 Sgr AB, as suggested by the proximity and similar space motions of...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/95723 |
| _version_ | 1811076758773956608 |
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| author | Kastner, Joel H. Sacco, G. G. Montez, R. Shi, H. Alecian, E. Argiroffi, C. Audard, M. Bouvier, J. Damiani, F. Donati, J.-F. Gregory, S. G. Hussain, G. A. J. Maggio, A. Montmerle, T. Huenemoerder, David P. Gudel, M. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Kastner, Joel H. Sacco, G. G. Montez, R. Shi, H. Alecian, E. Argiroffi, C. Audard, M. Bouvier, J. Damiani, F. Donati, J.-F. Gregory, S. G. Hussain, G. A. J. Maggio, A. Montmerle, T. Huenemoerder, David P. Gudel, M. |
| author_sort | Kastner, Joel H. |
| collection | MIT |
| description | We explore the possibility that GSC 07396-00759 (spectral type M1e) is a widely separated (~2[' over .]82, or projected separation ~12,350 AU) companion to the "old" (age ~12 Myr) classical T Tauri binary system V4046 Sgr AB, as suggested by the proximity and similar space motions of the two systems. If the two systems are equidistant and coeval, then GSC 07396-00759, like V4046 Sgr AB, must be a spectroscopic binary with nearly equal-mass components, and V4046 Sgr must be at least ~8 Myr old. Analysis of a serendipitous Chandra X-ray grating spectrum and light curve as well as XMM-Newton light curves and CCD spectra of GSC 07396-00759 obtained during long exposures targeting V4046 Sgr AB reveals a relatively hard (T[subscript X] ~ 10[superscript 7] K) X-ray spectrum, strong flaring, and relatively low-density plasma. These X-ray characteristics of GCS 07396-00759 are indicative of a high level of coronal activity, consistent with its apparent weak-lined T Tauri star status. Interactions between V4046 Sgr AB and GCS 07396-00759 when the two systems were more closely bound may be responsible for (1) their dissolution ~10[superscript 6] yr ago, (2) the present tight, circular orbit of V4046 Sgr AB, and (3) the persistence of the gaseous circumbinary disk still orbiting V4046 Sgr AB. |
| first_indexed | 2024-09-23T10:27:01Z |
| format | Article |
| id | mit-1721.1/95723 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:27:01Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/957232022-09-26T17:57:34Z GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB Kastner, Joel H. Sacco, G. G. Montez, R. Shi, H. Alecian, E. Argiroffi, C. Audard, M. Bouvier, J. Damiani, F. Donati, J.-F. Gregory, S. G. Hussain, G. A. J. Maggio, A. Montmerle, T. Huenemoerder, David P. Gudel, M. MIT Kavli Institute for Astrophysics and Space Research Huenemoerder, David P. We explore the possibility that GSC 07396-00759 (spectral type M1e) is a widely separated (~2[' over .]82, or projected separation ~12,350 AU) companion to the "old" (age ~12 Myr) classical T Tauri binary system V4046 Sgr AB, as suggested by the proximity and similar space motions of the two systems. If the two systems are equidistant and coeval, then GSC 07396-00759, like V4046 Sgr AB, must be a spectroscopic binary with nearly equal-mass components, and V4046 Sgr must be at least ~8 Myr old. Analysis of a serendipitous Chandra X-ray grating spectrum and light curve as well as XMM-Newton light curves and CCD spectra of GSC 07396-00759 obtained during long exposures targeting V4046 Sgr AB reveals a relatively hard (T[subscript X] ~ 10[superscript 7] K) X-ray spectrum, strong flaring, and relatively low-density plasma. These X-ray characteristics of GCS 07396-00759 are indicative of a high level of coronal activity, consistent with its apparent weak-lined T Tauri star status. Interactions between V4046 Sgr AB and GCS 07396-00759 when the two systems were more closely bound may be responsible for (1) their dissolution ~10[superscript 6] yr ago, (2) the present tight, circular orbit of V4046 Sgr AB, and (3) the persistence of the gaseous circumbinary disk still orbiting V4046 Sgr AB. 2015-02-27T15:41:21Z 2015-02-27T15:41:21Z 2011-09 2011-07 Article http://purl.org/eprint/type/JournalArticle 2041-8205 2041-8213 http://hdl.handle.net/1721.1/95723 Kastner, J. H., G. G. Sacco, R. Montez, D. P. Huenemoerder, H. Shi, E. Alecian, C. Argiroffi, et al. “GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB.” The Astrophysical Journal 740, no. 1 (September 20, 2011): L17. © 2011 The American Astronomical Society en_US http://dx.doi.org/10.1088/2041-8205/740/1/l17 The Astrophysical Journal. Letters 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 American Astronomical Society |
| spellingShingle | Kastner, Joel H. Sacco, G. G. Montez, R. Shi, H. Alecian, E. Argiroffi, C. Audard, M. Bouvier, J. Damiani, F. Donati, J.-F. Gregory, S. G. Hussain, G. A. J. Maggio, A. Montmerle, T. Huenemoerder, David P. Gudel, M. GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB |
| title | GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB |
| title_full | GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB |
| title_fullStr | GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB |
| title_full_unstemmed | GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB |
| title_short | GSC 07396-00759 = V4046 Sgr C[D]: A WIDE-SEPARATION COMPANION TO THE CLOSE T TAURI BINARY SYSTEM V4046 Sgr AB |
| title_sort | gsc 07396 00759 v4046 sgr c d a wide separation companion to the close t tauri binary system v4046 sgr ab |
| url | http://hdl.handle.net/1721.1/95723 |
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