HD 147513
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 24m 01.28927s[1] |
| Declination | −39° 11′ 34.7121″[1] |
| Apparent magnitude (V) | 5.38[2] |
| Characteristics | |
| Spectral type | G1VH-04[3] |
| U−B color index | +0.00[2] |
| B−V color index | +0.62[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | +12.6[5] km/s |
| Proper motion (μ) | RA: 71.89[1] mas/yr Dec.: 5.26[1] mas/yr |
| Parallax (π) | 78.26 ± 0.37 mas[1] |
| Distance | 41.7 ± 0.2 ly (12.78 ± 0.06 pc) |
| Absolute magnitude (MV) | 4.82[6] |
| Details | |
| Mass | 1.11[6] M☉ |
| Luminosity | 0.98[6] L☉ |
| Surface gravity (log g) | 4.50[7] cgs |
| Temperature | 5,855[7] K |
| Metallicity [Fe/H] | 0.03[7] dex |
| Rotation | 4.7[6] days |
| Rotational velocity (v sin i) | 0.32[8] km/s |
| Age | 400[9] Myr |
| Other designations | |
HD 147513 (62 G. Scorpii) is a 5th-magnitude star in the constellation of Scorpius. It was first catalogued by Italian astronomer Piazzi in his star catalogue as "XVI 55".[11]
It is a yellow dwarf star, similar to the Sun. However, it is slightly less massive and considerably younger, being only 400 million years old. It is approximately 40 light years from Earth.
HD 147513 is also a suspected variable star.[12] have an observed separation of 5360 AU.[13]
The star is a Sun-like star of spectral class G3–5 and luminosity class V, an apparent visual magnitude of +5.39 and an absolute visual magnitude of +4.84. The visual luminosity of star A is 1.01 times the Sun and it has a diameter of 1.08[citation needed] Sol.
This star is a member of the Ursa Major moving group that share a common proper motion through space. The atmosphere of the star is enriched in barium and deficient in carbon. This change in composition occurred when the companion passed through the asymptotic giant branch and contaminated this star's photosphere.[13]
The habitable zone for an Earthlike planet round this star would locate around 1.00 AU from the star and star B would appear as magnitude -2.85 object.
An extrasolar planet, designated HD 147513 Ab, which is at least as large as Jupiter, orbits component A in a highly eccentric orbit at a mean distance of 1.26 AU. It was discovered on 18 June 2002.[14]
Component B
Component B is a white dwarf star of spectral class of DA2. It has an apparent visual magnitude of +11.00. The habitable zone for an Earth-type planet around this star would be 0.076 AU and component A would appear as a magnitude -8.46 object.[citation needed]
Planetary system
In 2002, the Geneva Extrasolar Planet Search Team announced the discovery of an extrasolar planet orbiting the star.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >1.21 MJ | 1.32 | 528.4 ± 6.3 | 0.26 ± 0.05 | — | — |
See also
References
- ^ a b c d e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data, SIMBAD, Bibcode:1986EgUBV........0M.
- ^ Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
- ^ Kukarkin, B. V.; et al. (1981), Nachrichtenblatt der Vereinigung der Sternfreunde e.V. (Catalogue of suspected variable stars), Moscow: Academy of Sciences USSR Shternberg, Bibcode:1981NVS...C......0K.
- ^ Nordström, B.; et al. (2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs", Publications of the Astronomical Society of Australia, 21 (2): 129–133, Bibcode:2004PASA...21..129N, doi:10.1071/AS04013.
- ^ a b c d e f Mayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics. 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250.
- ^ a b c Ramírez, I.; et al. (February 2013), "Oxygen abundances in nearby FGK stars and the galactic chemical evolution of the local disk and halo", The Astrophysical Journal, 764 (1): 78, arXiv:1301.1582, Bibcode:2013ApJ...764...78R, doi:10.1088/0004-637X/764/1/78.
- ^ Martínez-Arnáiz, R.; et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter", Astronomy and Astrophysics, 520: A79, arXiv:1002.4391, Bibcode:2010A&A...520A..79M, doi:10.1051/0004-6361/200913725.
- ^ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal. 687 (2): 1264–1293. arXiv:0807.1686. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.
- ^ "HR 6094 -- Pre-main sequence Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2015-05-22.
- ^ Piazzi, G., (ed.) the Palermo Catalogue, 1814.
- ^ NSV 7680 -- Variable Star - SIMBAD entry
- ^ a b Porto de Mello, G. F.; da Silva, L. "HR 6094: A Young, Solar-Type, Solar-Metallicity Barium Dwarf Star". Astrophysical Journal Letters. 476: L89. Bibcode:1997ApJ...476L..89P. doi:10.1086/310504.
- ^ http://solstation.com/stars2/hr6094ab.htm
External links
- "HD 147513". The Extrasolar Planets Encyclopaedia.
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