Astronomy:59 Virginis
Coordinates: 
13h 16m 46.51596s, +09° 25′ 26.9590″
  | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 16m 46.51486s[1] |
| Declination | +09° 25′ 26.9601″[1] |
| Apparent magnitude (V) | 5.22[2] |
| Characteristics | |
| Evolutionary stage | main-sequence[3] |
| Spectral type | G0V[4] |
| Apparent magnitude (B) | 5.81[5] |
| Apparent magnitude (V) | 5.22[2] |
| Apparent magnitude (R) | 4.8[5] |
| Apparent magnitude (J) | 4.39±0.28[5] |
| Apparent magnitude (H) | 4.107±0.208[5] |
| Apparent magnitude (K) | 4.033±0.238[5] |
| Astrometry | |
| Radial velocity (Rv) | −27.25±0.13[1] km/s |
| Proper motion (μ) | RA: −335.473[1] mas/yr Dec.: +191.038[1] mas/yr |
| Parallax (π) | 56.8577 ± 0.1224[1] mas |
| Distance | 57.4 ± 0.1 ly (17.59 ± 0.04 pc) |
| Absolute magnitude (MV) | 4.08±0.010[6] |
| Details | |
| Mass | 1.29±0.05[7] M☉ |
| Radius | 1.227±0.012[8] R☉ |
| Luminosity (bolometric) | 2.01±0.03[8] L☉ |
| Surface gravity (log g) | 4.29±0.07[9] cgs |
| Temperature | 6205±20[9] K |
| Metallicity [Fe/H] | 0.22±0.04[9] dex |
| Rotation | 3.329 days[10] |
| Rotational velocity (v sin i) | 5.47+0.12−0.17[11] km/s |
| Age | 2.11±0.46[7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia | data |
59 Virginis (e Virginis, HR 5011, Gliese 504) is a G-type main-sequence star, located in constellation Virgo at approximately 57 light-years from Earth.
History of observations
59 Virginis is known to astronomers at least from 1598, when it was catalogued by Tycho Brahe in his manuscript catalogue of 1004 fixed stars. Brahe designated it as "Parvula sequens vindemiatricem", which means in Latin "A tiny following Vindemiatrix" (that is Epsilon Virginis), and assigned it a visual magnitude 6[12][13] (a modern value of its apparent magnitude (in band V) is 5.22). Five years later in 1603 Johann Bayer pictured it on constellation Virgo folio of his celestial atlas "Uranometria" and designated it with number 37, letter "e" (hence its Bayer designation e Virginis, or e Vir) and name "Alæ dextræ sequens", which means in Latin "Following right wing". Bayer also assigned it a visual magnitude 6.[14]
In July 2013, Kuzuhara et al. announced the discovery of planet b orbiting this star. The discovery was made using the 8.2-meter Subaru Telescope of Mauna Kea Observatory, Hawaii.
Age and other characteristics
The star is a relatively old Sun-like star with a spectral type of G0V[4] and an effective temperature 6205±20 K (not much hotter than the Sun).[9] It is twice as bright as the Sun in terms of luminosity.[8] 59 Virginis appeared to be a subgiant star that has recently evolved off the main sequence stage, as its luminosity and temperature places it in the main-sequence turnoff in the Hertzsprung–Russell diagram.[9][15], but was later found to be on the main sequence.[3] It has a rotation period of 3.329 days.[10] The star exhibits a Sun-like magnetic reversal cycle with the period about 12 years.[8]
59 Virginis has an unusually high stellar rotation velocity and stellar activity, which led some astronomers to believe that it could be a young star several million years old.[8] However, spectroscopy of the star's substellar companion, GJ 504 b, has suggested an age in the range of 3–6 Gyr.[9] Various studies have estimated different ages for 59 Virginis: 0.16+0.35−0.60 Gyr (2013),[10] 4.5+2.0−1.5 Gyr (2015),[15] 2.5+1.0−0.7 Gyr (2017),[9] and 4.0±1.8 Gyr (2018).[8] 2015 and 2017 studies led by Fuhrmann & Chini and D'Orazi et al. hypothesized that 59 Virginis's high activity and rotation may have been caused by the engulfment of a hot Jupiter.[15][9][8] This was supported by, among other studies, a 2026 publication, which found that only a scenario of planet engulfment can explain the star's fast rotation, X-ray luminosity, and angular momentum.[7]
Planetary system
In 2013, the discovery of a Jovian planet, b, by direct imaging of the system was announced.[10] A later re-analysis suggested that it may actually be a brown dwarf.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.0+1.8 −0.3 to 17 MJ |
80±49 | >56000 | 0.31±0.31 | 141±30° | 0.97±0.07 RJ |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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 Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode: 1995yCat.5050....0H.
- ↑ 3.0 3.1 Pezzotti, C.; Buldgen, G.; Magaudda, E.; Farnir, M.; Van Grootel, V.; Bellotti, S.; Poppenhaeger, K. (February 2025). "Planetary inward migration as the potential cause of GJ 504's fast rotation and bright X-ray luminosity: New constraints from eROSITA". Astronomy & Astrophysics 694: A179. doi:10.1051/0004-6361/202452580. ISSN 0004-6361. Bibcode: 2025A&A...694A.179P. https://www.aanda.org/10.1051/0004-6361/202452580.
- ↑ 4.0 4.1 Sharma, Kaushal; Kembhavi, Ajit; Kembhavi, Aniruddha; Sivarani, T; Abraham, Sheelu; Vaghmare, Kaustubh (2020-01-11). "Application of convolutional neural networks for stellar spectral classification" (in en). Monthly Notices of the Royal Astronomical Society 491 (2): 2280–2300. doi:10.1093/mnras/stz3100. ISSN 0035-8711. Bibcode: 2020MNRAS.491.2280S. https://academic.oup.com/mnras/article/491/2/2280/5613963.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 "* e Vir". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+e+Vir.
- ↑ Park, Sunkyung et al. (2013). "Wilson-Bappu Effect: Extended to Surface Gravity". The Astronomical Journal 146 (4): 73. doi:10.1088/0004-6256/146/4/73. Bibcode: 2013AJ....146...73P.
- ↑ 7.0 7.1 7.2 Bellotti, S.; Pezzotti, C.; Buldgen, G.; Vidotto, A. A.; Evensberget, D.; Magaudda, E. (2026-02-26). "Eating planets makes you younger: The magnetic dynamo rejuvenation of GJ 504 by planetary engulfment". Astronomy and Astrophysics. doi:10.1051/0004-6361/202659144.
- ↑ 8.0 8.1 8.2 8.3 8.4 8.5 8.6 Di Mauro, Maria Pia; Reda, Raffaele; Mathur, Savita; García, Rafael A.; Buzasi, Derek L.; Corsaro, Enrico; Benomar, Othman; González Cuesta, Lucía et al. (2022-11-01). "On the Characterization of GJ 504: A Magnetically Active Planet-host Star Observed by the Transiting Exoplanet Survey Satellite (TESS)". The Astrophysical Journal 940 (1): 93. doi:10.3847/1538-4357/ac8f44. ISSN 0004-637X. Bibcode: 2022ApJ...940...93D.
- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 D'Orazi, V.Expression error: Unrecognized word "et". (2017). "A critical reassessment of the fundamental properties of GJ 504: chemical composition and age". Astronomy & Astrophysics 598: A19. doi:10.1051/0004-6361/201629283. Bibcode: 2017A&A...598A..19D.
- ↑ 10.0 10.1 10.2 10.3 Kuzuhara, M. et al. (2013). "Direct Imaging of a Cold Jovian Exoplanet in Orbit around the Sun-like Star GJ 504". The Astrophysical Journal 774 (1): 11. doi:10.1088/0004-637X/774/1/11. Bibcode: 2013ApJ...774...11K.
- ↑ Swastik, C.; Banyal, Ravinder K.; Narang, Mayank; Manoj, P.; Sivarani, T.; Reddy, Bacham E.; Rajaguru, S. P. (2021), "Host Star Metallicity of Directly Imaged Wide-orbit Planets: Implications for Planet Formation", The Astronomical Journal 161 (3): 114, doi:10.3847/1538-3881/abd802, Bibcode: 2021AJ....161..114S
- ↑ Baily, Francis (1843). "The Catalogues of Ptolemy, Ulugh Beigh, Tycho Brahe, Halley, Hevelius, Deduced from the Best Authorities. With Various Notes and Corrections, and a Preface to Each Catalogue. To Which is Added the Synonym of each Star, in the Catalogues of Flamsteed of Lacaille, as far as the same can be ascertained". Memoirs of the Royal Astronomical Society 13: 1. Bibcode: 1843MmRAS..13....1B. (e Virginis: for Tycho Brahe's catalogue see page 149, for Hevelius' – page 235).
- ↑ Verbunt, F.; van Gent, R. H. (2010). "Three editions of the star catalogue of Tycho Brahe. Machine-readable versions and comparison with the modern Hipparcos Catalogue". Astronomy & Astrophysics 516: A28. doi:10.1051/0004-6361/201014002. Bibcode: 2010A&A...516A..28V.
- ↑ Bayer, Johann (1603). "Uranometria: omnium asterismorum continens schemata, nova methodo delineata, aereis laminis expressa". Uranometria in Linda Hall Library: link . Pages on constellation Virgo: Table, Map.
- ↑ 15.0 15.1 15.2 Fuhrmann, K.; Chini, R. (2015). "On the age of Gliese 504". The Astrophysical Journal 806 (2): 163. doi:10.1088/0004-637X/806/2/163. Bibcode: 2015ApJ...806..163F.
Coordinates: 13h 16m 46.51596s, +09° 25′ 26.9590″
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