Astronomy:Psi3 Piscium
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Pisces |
| Right ascension | 01h 09m 49.20090s[1] |
| Declination | +19° 39′ 30.2649″[1] |
| Apparent magnitude (V) | 5.56[2] |
| Characteristics | |
| Evolutionary stage | subgiant[1] |
| Spectral type | F9 IIIa[3] or G0 IV[4] |
| B−V color index | −0.70[2] |
| Astrometry | |
| Radial velocity (Rv) | −6.6±2.1[5] km/s |
| Proper motion (μ) | RA: −5.971[1] mas/yr Dec.: +9.170[1] mas/yr |
| Parallax (π) | 7.8074 ± 0.0721[1] mas |
| Distance | 418 ± 4 ly (128 ± 1 pc) |
| Absolute magnitude (MV) | +3.38[6] |
| Details | |
| Mass | 2.69[7] M☉ |
| Radius | 10.1[7] R☉ |
| Luminosity | 87[7] L☉ |
| Surface gravity (log g) | 2.86[7] cgs |
| Temperature | 5,553[7] K |
| Metallicity [Fe/H] | +0.88±0.21[8] dex |
| Rotation | 11 d[9] |
| Rotational velocity (v sin i) | 87.7±4.4[6] km/s |
| Age | 590[9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Psi3 Piscium, which is Latinized from ψ3 Piscium, is a solitary,[11] yellow-hued star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.56. Based upon an annual parallax shift of 7.8 mas as seen from Earth, it is located about 418 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.33 due to interstellar dust.[4] The star is drifting closer to the Sun with a radial velocity of −7 km/s.
This F-type subgiant star with a stellar classification of F9 IIIa[3] or G0IV.[4] It is an X-ray source with a luminosity of (0.82±0.13)×1030 erg s−1 in the 0.3−10 keV band.[12] The projected rotational velocity is 87.7±4.4 km/s.[6] It has 2.7 times the mass of the Sun and 10.1 times the Sun's radius.[7] The star is radiating 87 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,553 K.[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 Høg, E. et al. (March 2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics 355: L27–L30, doi:10.1888/0333750888/2862, Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K.
- ↑ 4.0 4.1 4.2 van Belle, G. T. et al. (May 2008), "The Palomar Testbed Interferometer Calibrator Catalog", The Astrophysical Journal Supplement Series 176 (1): 276–292, doi:10.1086/526548, Bibcode: 2008ApJS..176..276V.
- ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ 6.0 6.1 6.2 Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics 446 (1): 267–277, doi:10.1051/0004-6361:20053911, Bibcode: 2006A&A...446..267R
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 Ayres, Thomas (2023). "In the Trenches of the Solar-Stellar Connection. VII. Wilson-Bappu 2022". The Astrophysical Journal Supplement Series 266 (1): 6. doi:10.3847/1538-4365/acb535. Bibcode: 2023ApJS..266....6A.
- ↑ Behr, Bradford B. (November 2003), "Rotation Velocities of Red and Blue Field Horizontal-Branch Stars", The Astrophysical Journal Supplement Series 149 (1): 101–121, doi:10.1086/378352, Bibcode: 2003ApJS..149..101B.
- ↑ 9.0 9.1 Isaacson, Howard; Fischer, Debra (2010). "Chromospheric Activity and Jitter Measurements for 2630 Stars on the California Planet Search". The Astrophysical Journal 725 (1): 875. doi:10.1088/0004-637X/725/1/875. Bibcode: 2010ApJ...725..875I.
- ↑ "psi03 Psc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=psi03+Psc.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Gondoin, P. (December 2005), "The relation between X-ray activity and rotation in intermediate-mass G giants", Astronomy and Astrophysics 444 (2): 531–538, doi:10.1051/0004-6361:20053567, Bibcode: 2005A&A...444..531G.
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