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26 Andromedae

April 12, 2024

26 Andromedae, abbreviated 26 And, is a binary star system[1] in the constellation Andromeda. 26 Andromedae is the Flamsteed designation. It has a combined apparent visual magnitude of 6.10, which is near the lower limit of visibility to the naked eye. The distance to this system can be estimated from its annual parallax shift of 5.35 mas, which yields a distance of about 600 light years. At that distance, the visual magnitude of the stars is diminished from an extinction of 0.04 due to interstellar dust.[3] The system is moving further from the Earth with a heliocentric radial velocity of +3.3 km/s.[9]

26 Andromedae

A visual band light curve for 26 Andromedae, adapted from Zasche and Svoboda (2008)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
A
Right ascension 00h 18m 42.16888s[2]
Declination +43° 47′ 28.1082″[2]
Apparent magnitude (V) 6.11[3]
B
Right ascension 00h 18m 41.66160s[4]
Declination +43° 47′ 24.9776″[4]
Apparent magnitude (V) 9.70[3]
Characteristics
Evolutionary stage main sequence[5]
Spectral type B8 V[6] + F3 V[1]
B−V color index −0.074±0.004[7]
Variable type suspected[8][1]
Astrometry
A
Radial velocity (Rv)+3.3[9] km/s
Proper motion (μ) RA: 23.328[2] mas/yr
Dec.: −2.755[2] mas/yr
Parallax (π)5.3927 ± 0.0192 mas[2]
Distance605 ± 2 ly
(185.4 ± 0.7 pc)
Absolute magnitude (MV)0.02[10]
B
Proper motion (μ) RA: 22.083[2] mas/yr
Dec.: −3.568[2] mas/yr
Parallax (π)5.4683 ± 0.0142 mas[4]
Distance596 ± 2 ly
(182.9 ± 0.5 pc)
Absolute magnitude (MV)4.00[11]
Details
A
Mass3.54±0.12[5] M☉
Radius3.76[12] R☉
Luminosity219[6] L☉
Surface gravity (log g)3.82[2] cgs
Temperature11,939[6] K
Rotational velocity (v sin i)18[5] km/s
Age95[6] Myr
B
Mass1.0[4] M☉
Radius1.2[4] R☉
Luminosity1.5[4] L☉
Surface gravity (log g)4.32[4] cgs
Temperature5,924[4] K
Age6.1[4] Gyr
Other designations
26 And, BD+42°48, HD 1438, HIP 1501, HR 70, SAO 36256, PPM 42805, WDS J00187+4347[13]
Database references
SIMBADdata

The magnitude 6.11[3] primary, component A, is a B-type main-sequence star with a stellar classification of B8 V.[6] The star has 3.54[5] times the mass of the Sun and 3.76[12] times the Sun's radius. It is around 95[6] million years old and is spinning with a projected rotational velocity of 18 km/s.[5] 26 And is radiating 219[6] times the Sun's luminosity from its photosphere at an effective temperature of 11,939 K.[6] It displays an infrared excess that suggests a circumstellar debris disk orbiting at a distance of 169.3 AU from the star with a temperature of 75 K.[12]

The fainter secondary, component B, is a magnitude 9.70[3] star located 6.2″ from the primary. It is an F-type main-sequence star with a class of F3 V that shows an unexplained long term variability.

One of the components of this system displays a slight photometric variation with a period of 3.16 days. This may be caused by pulsation or an ellipsoidal variation.[1] This system's X-ray emission hasn't been detected yet, with an upper limit of Lx < 29.79 erg/s.[3]

References edit

  1. ^ a b c d e Zasche, P.; Svoboda, P. (May 2008), "The Unconfirmed Eclipsing Nature of V348 And and Detection of Variability of HD 1438", Information Bulletin on Variable Stars, 5827: 1, Bibcode:2008IBVS.5827....1Z.
  2. ^ a b c d e f g h Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b c d e f Huélamo, N.; et al. (July 2000), "X-ray emission from Lindroos binary systems", Astronomy and Astrophysics, 359: 227–241, arXiv:astro-ph/0005348, Bibcode:2000A&A...359..227H.
  4. ^ a b c d e f g h i Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  5. ^ a b c d e Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
  6. ^ a b c d e f g h Wyatt, M. C.; et al. (July 2007), "Steady State Evolution of Debris Disks around A Stars", The Astrophysical Journal, 663 (1): 365–382, arXiv:astro-ph/0703608, Bibcode:2007ApJ...663..365W, doi:10.1086/518404, S2CID 18883195.
  7. ^ 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.
  8. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
  9. ^ a b Steenbrugge, K. C.; et al. (May 2003), "Radial velocities of early-type stars in the Perseus OB2 association", Astronomy and Astrophysics, 402 (2): 587–605, arXiv:astro-ph/0302428, Bibcode:2003A&A...402..587S, doi:10.1051/0004-6361:20030277, S2CID 15771155.
  10. ^ Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
  11. ^ Lindroos, K. P. (May 1985), "A study of visual double stars with early type primaries. IV. Astrophysical data", Astronomy and Astrophysics, 60: 183–221, Bibcode:1985A&AS...60..183L.
  12. ^ a b c Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series, 225 (1): 24, arXiv:1606.01134, Bibcode:2016ApJS..225...15C, doi:10.3847/0067-0049/225/1/15, S2CID 118438871, 15.
  13. ^ "26 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 25, 2018.

External links edit

  • Image 26 Andromedae

April 12, 2024
andromedae, abbreviated, binary, star, system, constellation, andromeda, flamsteed, designation, combined, apparent, visual, magnitude, which, near, lower, limit, visibility, naked, distance, this, system, estimated, from, annual, parallax, shift, which, yield. 26 Andromedae abbreviated 26 And is a binary star system 1 in the constellation Andromeda 26 Andromedae is the Flamsteed designation It has a combined apparent visual magnitude of 6 10 which is near the lower limit of visibility to the naked eye The distance to this system can be estimated from its annual parallax shift of 5 35 mas which yields a distance of about 600 light years At that distance the visual magnitude of the stars is diminished from an extinction of 0 04 due to interstellar dust 3 The system is moving further from the Earth with a heliocentric radial velocity of 3 3 km s 9 26 AndromedaeA visual band light curve for 26 Andromedae adapted from Zasche and Svoboda 2008 1 Observation dataEpoch J2000 Equinox J2000Constellation AndromedaARight ascension 00h 18m 42 16888s 2 Declination 43 47 28 1082 2 Apparent magnitude V 6 11 3 BRight ascension 00h 18m 41 66160s 4 Declination 43 47 24 9776 4 Apparent magnitude V 9 70 3 CharacteristicsEvolutionary stage main sequence 5 Spectral type B8 V 6 F3 V 1 B V color index 0 074 0 004 7 Variable type suspected 8 1 AstrometryARadial velocity Rv 3 3 9 km sProper motion m RA 23 328 2 mas yr Dec 2 755 2 mas yrParallax p 5 3927 0 0192 mas 2 Distance605 2 ly 185 4 0 7 pc Absolute magnitude MV 0 02 10 BProper motion m RA 22 083 2 mas yr Dec 3 568 2 mas yrParallax p 5 4683 0 0142 mas 4 Distance596 2 ly 182 9 0 5 pc Absolute magnitude MV 4 00 11 DetailsAMass3 54 0 12 5 M Radius3 76 12 R Luminosity219 6 L Surface gravity log g 3 82 2 cgsTemperature11 939 6 KRotational velocity v sin i 18 5 km sAge95 6 MyrBMass1 0 4 M Radius1 2 4 R Luminosity1 5 4 L Surface gravity log g 4 32 4 cgsTemperature5 924 4 KAge6 1 4 GyrOther designations26 And BD 42 48 HD 1438 HIP 1501 HR 70 SAO 36256 PPM 42805 WDS J00187 4347 13 Database referencesSIMBADdataThe magnitude 6 11 3 primary component A is a B type main sequence star with a stellar classification of B8 V 6 The star has 3 54 5 times the mass of the Sun and 3 76 12 times the Sun s radius It is around 95 6 million years old and is spinning with a projected rotational velocity of 18 km s 5 26 And is radiating 219 6 times the Sun s luminosity from its photosphere at an effective temperature of 11 939 K 6 It displays an infrared excess that suggests a circumstellar debris disk orbiting at a distance of 169 3 AU from the star with a temperature of 75 K 12 The fainter secondary component B is a magnitude 9 70 3 star located 6 2 from the primary It is an F type main sequence star with a class of F3 V that shows an unexplained long term variability One of the components of this system displays a slight photometric variation with a period of 3 16 days This may be caused by pulsation or an ellipsoidal variation 1 This system s X ray emission hasn t been detected yet with an upper limit of Lx lt 29 79 erg s 3 References edit a b c d e Zasche P Svoboda P May 2008 The Unconfirmed Eclipsing Nature of V348 And and Detection of Variability of HD 1438 Information Bulletin on Variable Stars 5827 1 Bibcode 2008IBVS 5827 1Z a b c d e f g h Vallenari A et al Gaia collaboration 2023 Gaia Data Release 3 Summary of the content and survey properties Astronomy and Astrophysics 674 A1 arXiv 2208 00211 Bibcode 2023A amp A 674A 1G doi 10 1051 0004 6361 202243940 S2CID 244398875 Gaia DR3 record for this source at VizieR a b c d e f Huelamo N et al July 2000 X ray emission from Lindroos binary systems Astronomy and Astrophysics 359 227 241 arXiv astro ph 0005348 Bibcode 2000A amp A 359 227H a b c d e f g h i Vallenari A et al Gaia collaboration 2023 Gaia Data Release 3 Summary of the content and survey properties Astronomy and Astrophysics 674 A1 arXiv 2208 00211 Bibcode 2023A amp A 674A 1G doi 10 1051 0004 6361 202243940 S2CID 244398875 Gaia DR3 record for this source at VizieR a b c d e Zorec J Royer F 2012 Rotational velocities of A type stars IV Evolution of rotational velocities Astronomy amp Astrophysics 537 A120 arXiv 1201 2052 Bibcode 2012A amp A 537A 120Z doi 10 1051 0004 6361 201117691 S2CID 55586789 a b c d e f g h Wyatt M C et al July 2007 Steady State Evolution of Debris Disks around A Stars The Astrophysical Journal 663 1 365 382 arXiv astro ph 0703608 Bibcode 2007ApJ 663 365W doi 10 1086 518404 S2CID 18883195 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 Samus N N Durlevich O V et al 2009 VizieR Online Data Catalog General Catalogue of Variable Stars Samus 2007 2013 VizieR On line Data Catalog B GCVS Originally Published in 2009yCat 102025S 1 B gcvs Bibcode 2009yCat 102025S a b Steenbrugge K C et al May 2003 Radial velocities of early type stars in the Perseus OB2 association Astronomy and Astrophysics 402 2 587 605 arXiv astro ph 0302428 Bibcode 2003A amp A 402 587S doi 10 1051 0004 6361 20030277 S2CID 15771155 Gontcharov G A November 2012 Spatial distribution and kinematics of OB stars Astronomy Letters 38 11 694 706 arXiv 1606 09028 Bibcode 2012AstL 38 694G doi 10 1134 S1063773712110035 S2CID 119108982 Lindroos K P May 1985 A study of visual double stars with early type primaries IV Astrophysical data Astronomy and Astrophysics 60 183 221 Bibcode 1985A amp AS 60 183L a b c Cotten Tara H Song Inseok July 2016 A Comprehensive Census of Nearby Infrared Excess Stars The Astrophysical Journal Supplement Series 225 1 24 arXiv 1606 01134 Bibcode 2016ApJS 225 15C doi 10 3847 0067 0049 225 1 15 S2CID 118438871 15 26 And SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved September 25 2018 External links editImage 26 Andromedae Retrieved from https en wikipedia org w index php title 26 Andromedae amp oldid 1191215213, 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