The runaway binary LP 400-22 is leaving the Galaxy
We present optical spectroscopy, astrometry, radio and X-ray observations of the runaway binary LP 400-22. We refine the orbital parameters of the system based on our new radial velocity observations. Our parallax data indicate that LP 400-22 is significantly more distant (3σ lower limit of 840pc) t...
| Autores principales: | , , , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2013
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/85509 |
| Aporte de: |
| id |
I19-R120-10915-85509 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas Binaries: close Galaxy: kinematics and dynamics Galaxy: stellar content Stars: individual: LP 400-22 Stars: individual: WD 2234+222 White dwarfs |
| spellingShingle |
Ciencias Astronómicas Binaries: close Galaxy: kinematics and dynamics Galaxy: stellar content Stars: individual: LP 400-22 Stars: individual: WD 2234+222 White dwarfs Kilic, M. Gianninas, A. Brown, W. R. Harris, H. C. Dahn, C.C. Agüeros, M. A. Heinke, C. O. Kenyon, S. J. Panei, Jorge Alejandro Camilo, F. The runaway binary LP 400-22 is leaving the Galaxy |
| topic_facet |
Ciencias Astronómicas Binaries: close Galaxy: kinematics and dynamics Galaxy: stellar content Stars: individual: LP 400-22 Stars: individual: WD 2234+222 White dwarfs |
| description |
We present optical spectroscopy, astrometry, radio and X-ray observations of the runaway binary LP 400-22. We refine the orbital parameters of the system based on our new radial velocity observations. Our parallax data indicate that LP 400-22 is significantly more distant (3σ lower limit of 840pc) than initially predicted. LP 400-22 has a tangential velocity in excessof 830 km s-1; it is unbound to the Galaxy. Our radio and X-ray observations fail to detect a recycled millisecond pulsar companion, indicating that LP 400-22 is a double white dwarf system. This essentially rules out a supernova runaway ejection mechanism. Based on its orbit, a Galactic Centre origin is also unlikely. However, its orbit intersects the locations of several globular clusters; dynamical interactions between LP 400-22 and other binary stars or a central black hole in a dense cluster could explain the origin of this unusual binary. |
| format |
Articulo Articulo |
| author |
Kilic, M. Gianninas, A. Brown, W. R. Harris, H. C. Dahn, C.C. Agüeros, M. A. Heinke, C. O. Kenyon, S. J. Panei, Jorge Alejandro Camilo, F. |
| author_facet |
Kilic, M. Gianninas, A. Brown, W. R. Harris, H. C. Dahn, C.C. Agüeros, M. A. Heinke, C. O. Kenyon, S. J. Panei, Jorge Alejandro Camilo, F. |
| author_sort |
Kilic, M. |
| title |
The runaway binary LP 400-22 is leaving the Galaxy |
| title_short |
The runaway binary LP 400-22 is leaving the Galaxy |
| title_full |
The runaway binary LP 400-22 is leaving the Galaxy |
| title_fullStr |
The runaway binary LP 400-22 is leaving the Galaxy |
| title_full_unstemmed |
The runaway binary LP 400-22 is leaving the Galaxy |
| title_sort |
runaway binary lp 400-22 is leaving the galaxy |
| publishDate |
2013 |
| url |
http://sedici.unlp.edu.ar/handle/10915/85509 |
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