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Psi7 Aurigae

May 04, 2024

For other stars with a similar Bayer designation, see ψ Aurigae.

Psi7 Aurigae, Latinized from ψ7 Aurigae, is a star in the northern constellation of Auriga. It is a dim, naked eye star with an apparent visual magnitude of 5.02. Based upon Gaia Data Release 2 parallax values, it is approximately 330 light-years (100 parsecs) from Earth.

Psi7 Aurigae
Location of ψ7 Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 50m 45.94330s[1]
Declination +41° 46′ 52.4267″[1]
Apparent magnitude (V) 5.02[2]
Characteristics
Spectral type K3 III[3]
U−B color index +1.35[2]
B−V color index +1.27[2]
R−I color index 0.46
Astrometry
Radial velocity (Rv)+59.53 ± 0.25[4] km/s
Proper motion (μ) RA: –25.660[5] mas/yr
Dec.: –138.163[5] mas/yr
Parallax (π)9.8872 ± 0.1499 mas[5]
Distance330 ± 5 ly
(101 ± 2 pc)
Absolute magnitude (MV)−0.33[6]
Details
Radius24[7] R☉
Luminosity217[6] L☉
Surface gravity (log g)2.35[8] cgs
Temperature4,300[8] K
Metallicity [Fe/H]0.00[8] dex
Rotational velocity (v sin i)10[9] km/s
Other designations
ψ7 Aur, 58 Aurigae, BD+41 1536, FK5 2527, HD 49520, HIP 32844, HR 2516, SAO 41380.[10]
Database references
SIMBADdata
ψ7 Aurigae in optical light

ψ7 Aurigae is a giant star with a stellar classification of K3 III.[3] The measured angular diameter of this star, after correction for limb darkening, is 1.96 ± 0.04 mas.[11] At its estimated distance,[1] this yields a physical size of about 24 times the radius of the Sun.[7] The outer envelope has an effective temperature of 4,300,[8] giving it an orange colour and a classification as a K-type star.[12] Although cooler than the sun, its larger size means that it is more luminous, emitting in total 217 times as much electromagnetic radiation.

It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union (IAU).

See also edit

References edit

  1. ^ a b c van Leeuwen, Floor (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752v1, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600. Note: see VizieR catalogue I/311.
  2. ^ a b c Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
  3. ^ a b Roman, Nancy G. (July 1952), "The Spectra of the Bright Stars of Types F5-K5", Astrophysical Journal, 116: 122, Bibcode:1952ApJ...116..122R, doi:10.1086/145598.
  4. ^ Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430 (1): 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272, S2CID 17804304.
  5. ^ a b c 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.
  6. ^ a b 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.
  7. ^ a b Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:
     
  8. ^ a b c d McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
  9. ^ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1): 1, Bibcode:1970CoAsi.239....1B.
  10. ^ "* 58 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-08-24.
  11. ^ Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039
  12. ^ , Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 18, 2012, retrieved 2012-01-16.

External links edit

  • HR 2516
  • CCDM J06508+4147
  • Image Psi7 Aurigae

May 04, 2024
psi7, aurigae, other, stars, with, similar, bayer, designation, aurigae, latinized, from, aurigae, star, northern, constellation, auriga, naked, star, with, apparent, visual, magnitude, based, upon, gaia, data, release, parallax, values, approximately, light, . For other stars with a similar Bayer designation see ps Aurigae Psi7 Aurigae Latinized from ps7 Aurigae is a star in the northern constellation of Auriga It is a dim naked eye star with an apparent visual magnitude of 5 02 Based upon Gaia Data Release 2 parallax values it is approximately 330 light years 100 parsecs from Earth Psi7 AurigaeLocation of ps7 Aurigae circled Observation dataEpoch J2000 Equinox J2000 Constellation Auriga Right ascension 06h 50m 45 94330s 1 Declination 41 46 52 4267 1 Apparent magnitude V 5 02 2 Characteristics Spectral type K3 III 3 U B color index 1 35 2 B V color index 1 27 2 R I color index 0 46 AstrometryRadial velocity Rv 59 53 0 25 4 km sProper motion m RA 25 660 5 mas yr Dec 138 163 5 mas yrParallax p 9 8872 0 1499 mas 5 Distance330 5 ly 101 2 pc Absolute magnitude MV 0 33 6 DetailsRadius24 7 R Luminosity217 6 L Surface gravity log g 2 35 8 cgsTemperature4 300 8 KMetallicity Fe H 0 00 8 dexRotational velocity v sin i 10 9 km s Other designationsps7 Aur 58 Aurigae BD 41 1536 FK5 2527 HD 49520 HIP 32844 HR 2516 SAO 41380 10 Database referencesSIMBADdata ps7 Aurigae in optical light ps7 Aurigae is a giant star with a stellar classification of K3 III 3 The measured angular diameter of this star after correction for limb darkening is 1 96 0 04 mas 11 At its estimated distance 1 this yields a physical size of about 24 times the radius of the Sun 7 The outer envelope has an effective temperature of 4 300 8 giving it an orange colour and a classification as a K type star 12 Although cooler than the sun its larger size means that it is more luminous emitting in total 217 times as much electromagnetic radiation It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union IAU See also editPsi AurigaeReferences edit a b c van Leeuwen Floor November 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752v1 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 Note see VizieR catalogue I 311 a b c Johnson H L et al 1966 UBVRIJKL photometry of the bright stars Communications of the Lunar and Planetary Laboratory 4 99 99 Bibcode 1966CoLPL 4 99J a b Roman Nancy G July 1952 The Spectra of the Bright Stars of Types F5 K5 Astrophysical Journal 116 122 Bibcode 1952ApJ 116 122R doi 10 1086 145598 Famaey B et al January 2005 Local kinematics of K and M giants from CORAVEL Hipparcos Tycho 2 data Revisiting the concept of superclusters Astronomy and Astrophysics 430 1 165 186 arXiv astro ph 0409579 Bibcode 2005A amp A 430 165F doi 10 1051 0004 6361 20041272 S2CID 17804304 a b c Brown A G A et al Gaia collaboration August 2018 Gaia Data Release 2 Summary of the contents and survey properties Astronomy amp Astrophysics 616 A1 arXiv 1804 09365 Bibcode 2018A amp A 616A 1G doi 10 1051 0004 6361 201833051 Gaia DR2 record for this source at VizieR a b 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 a b Lang Kenneth R 2006 Astrophysical formulae Astronomy and astrophysics library vol 1 3rd ed Birkhauser ISBN 3 540 29692 1 The radius R is given by 2 R 116 1 96 10 3 AU 0 0046491 AU R 48 9 R displaystyle begin aligned 2 cdot R amp frac 116 cdot 1 96 cdot 10 3 text AU 0 0046491 text AU R bigodot amp approx 48 9 cdot R bigodot end aligned nbsp a b c d McWilliam Andrew December 1990 High resolution spectroscopic survey of 671 GK giants I Stellar atmosphere parameters and abundances Astrophysical Journal Supplement Series 74 1075 1128 Bibcode 1990ApJS 74 1075M doi 10 1086 191527 Bernacca P L Perinotto M 1970 A catalogue of stellar rotational velocities Contributi Osservatorio Astronomico di Padova in Asiago 239 1 1 Bibcode 1970CoAsi 239 1B 58 Aur SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2012 08 24 Richichi A Percheron I Khristoforova M February 2005 CHARM2 An updated Catalog of High Angular Resolution Measurements Astronomy and Astrophysics 431 2 773 777 Bibcode 2005A amp A 431 773R doi 10 1051 0004 6361 20042039 The Colour of Stars Australia Telescope Outreach and Education Commonwealth Scientific and Industrial Research Organisation December 21 2004 archived from the original on March 18 2012 retrieved 2012 01 16 External links editHR 2516 CCDM J06508 4147 Image Psi7 Aurigae Retrieved from https en wikipedia org w index php title Psi7 Aurigae amp oldid 1184416506, wikipedia, wiki, book, books, library,

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