Phi1 Pavonis

Phi¹ Pavonis, latinized from φ¹ Pavonis, is a single^[10] star in the southern constellation of Pavo. It has a yellow-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.75.^[2] The star is located at a distance of approximately 92 light years away based on parallax. It is drifting closer to the Sun with a radial velocity of −20 km/s.^[5]

For other stars with this Bayer designation, see φ Pavonis.

φ¹ Pavonis

Location of φ1 Pavonis (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Pavo
Right ascension	20h 35m 34.84931s[1]
Declination	−60° 34′ 54.3103″[1]
Apparent magnitude (V)	4.75[2]
Characteristics
Evolutionary stage	main sequence
Spectral type	F0V[3]
U−B color index	+0.04[4]
B−V color index	+0.29[2]
Astrometry
Radial velocity (Rv)	−20.0±4.2[5] km/s
Proper motion (μ)	RA: +70.271[1] mas/yr Dec.: −184.963[1] mas/yr
Parallax (π)	35.3436 ± 0.2300 mas[1]
Distance	92.3 ± 0.6 ly (28.3 ± 0.2 pc)
Absolute magnitude (MV)	2.53[2]
Details
Mass	1.51[6] M☉
Radius	1.83+0.15 −0.09[1] R☉
Luminosity	8.17±0.06[1] L☉
Temperature	7,209+190 −281[1] K
Rotational velocity (v sin i)	150.0[7] km/s
Age	30+230 −10[8] Myr
Other designations
phi1 Pav, CPD−61° 6492, GC 28609, HD 195627, HIP 101612, HR 7848, SAO 254823[9]
Database references
SIMBAD	data

This is an ordinary F-type main-sequence star with a stellar classification of F0V.^[3] It has 1.5^[6] times the mass of the Sun and 1.8^[1] times the Sun's radius. This is a young star, perhaps 30^[8] million years old, and has a high rate of spin with a projected rotational velocity of 150 km/s.^[7] It is radiating 8.2^[1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,209 K.^[1]

Phi¹ Pavonis is a candidate debris disk star, although Gray et al. (2006) reported a non-detection of an infrared excess.^[3] Nilsson et al. (2010) report a marginal detection, orbiting 74 AU from the host star with a temperature of 57 K and an estimated 3.1±1.7 times the mass of the Moon.^[8]

References

1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
2. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644. Vizier catalog entry
3. 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, S2CID 119476992
4. Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M.Vizier catalog entry
5. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
6. David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID 33401607. Vizier catalog entry
7. Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G. 3244. Bibcode:2005yCat.3244....0G. Vizier catalog entry
8. Nilsson, R.; et al. (July 2010). "Kuiper belts around nearby stars". Astronomy and Astrophysics. 518: 15. arXiv:1005.3215. Bibcode:2010A&A...518A..40N. doi:10.1051/0004-6361/201014444. S2CID 9703586. A40.
9. "phi01 Pav". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-05-11.
10. Rodriguez, David R.; Zuckerman, B. (February 2012). "Binaries among Debris Disk Stars". The Astrophysical Journal. 745 (2): 13. arXiv:1111.5618. Bibcode:2012ApJ...745..147R. doi:10.1088/0004-637X/745/2/147. S2CID 73681879. 147.