HD 107914: Difference between revisions
Content deleted Content added
m clean up using AWB |
Citation bot (talk | contribs) m Citations: [262]+: doi, class. Headbomb |
||
| Line 66: | Line 66: | ||
| eprint=1003.5308 |
| eprint=1003.5308 |
||
| title=Giant Nemesis candidate HD 107914 / HIP 60503 for the perforation of Oort cloud |
| title=Giant Nemesis candidate HD 107914 / HIP 60503 for the perforation of Oort cloud |
||
| class=astro-ph.SR |
|||
}}</ref> Preliminary measurements from the [[H-alpha line]] give the [[radial velocity]] in the range from -13 to +3 km/s (measured by M. Muterspaugh and M. Williamson at a robotic spectroscopic telescope in Arizona, cf.<ref>{{cite journal |last=Eaton |first=J. A. |coauthors=Williamson M. H. |title=The Tennessee State University Automatic Spectroscopic Telescope: Data Processing and Velocity Variation of Cool Giants|year=2007 |journal=PASP |volume=119 |pages=886–897}}</ref>). Such values of the [[radial velocity]] are too small for the collision course with the [[solar system]]. For example, if <math>V_r=-10</math> km/s, then the distance from the Sun to HD 107914 at its closest approach will be ≈1.6 [[Parsec|pc]] in linear approximation. |
}}</ref> Preliminary measurements from the [[H-alpha line]] give the [[radial velocity]] in the range from -13 to +3 km/s (measured by M. Muterspaugh and M. Williamson at a robotic spectroscopic telescope in Arizona, cf.<ref>{{cite journal |doi=10.1086/521231 |last=Eaton |first=J. A. |coauthors=Williamson M. H. |title=The Tennessee State University Automatic Spectroscopic Telescope: Data Processing and Velocity Variation of Cool Giants|year=2007 |journal=PASP |volume=119 |pages=886–897}}</ref>). Such values of the [[radial velocity]] are too small for the collision course with the [[solar system]]. For example, if <math>V_r=-10</math> km/s, then the distance from the Sun to HD 107914 at its closest approach will be ≈1.6 [[Parsec|pc]] in linear approximation. |
||
==References== |
==References== |
||
Revision as of 20:23, 18 March 2011
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| CCDM J12242-3855A | |
| Right ascension | 12h 24m 13.0s[1] |
| Declination | –38° 54′ 50″[1] |
| Apparent magnitude (V) | 7.0[1] |
| CCDM J12242-3855B | |
| Right ascension | 12h 24m 13.2s[1] |
| Declination | –38° 54′ 47″[1] |
| Apparent magnitude (V) | 12.8[1] |
| Characteristics | |
| Spectral type | A7/8III[2] |
| B−V color index | 0.272[3] |
| Astrometry | |
| Proper motion (μ) | RA: 0.55 [0.4] [4] mas/yr Dec.: -0.02 [0.3] [4] mas/yr |
| Parallax (π) | 12.77 ± 0.46 mas |
| Distance | 255 ± 9 ly (78 ± 3 pc) |
| Other designations | |
HD 107914 is a binary star in the constellation Centaurus at ≈78.3 pc from the Sun classified as a white A7/8-giant.[2] This relatively nearby star has notoriously small proper motions making from it a potential Nemesis candidate to penetrate into the Oort cloud.[5] Preliminary measurements from the H-alpha line give the radial velocity in the range from -13 to +3 km/s (measured by M. Muterspaugh and M. Williamson at a robotic spectroscopic telescope in Arizona, cf.[6]). Such values of the radial velocity are too small for the collision course with the solar system. For example, if km/s, then the distance from the Sun to HD 107914 at its closest approach will be ≈1.6 pc in linear approximation.
References
- ^ a b c d e f "CCDM J12242-3855. Vizier detailed page". Vizier. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- ^ a b "CCDM J12242-3855AB. Double or multiple star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- ^ "HIP 60503. VizieR detailed page". Vizier. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- ^ a b "Detailed description of I/311". Hipparcos. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- ^ Potemine, Igor Yu. (2010-04-13). "Giant Nemesis candidate HD 107914 / HIP 60503 for the perforation of Oort cloud". arXiv:1003.5308 [astro-ph.SR].
- ^ Eaton, J. A. (2007). "The Tennessee State University Automatic Spectroscopic Telescope: Data Processing and Velocity Variation of Cool Giants". PASP. 119: 886–897. doi:10.1086/521231.
{{cite journal}}: Unknown parameter|coauthors=ignored (|author=suggested) (help)