Zeta Andromedae is the star's Bayer designation. It also has the Flamsteed designation 34 Andromedae and multiple other designations in stellar catalogues.
Sidney Hall - Urania's Mirror - Gloria Frederici, Andromeda, and Triangula (north is to the left)
The star's location is in the northern constellation Andromeda, in which it is the second-most southerly of the stars in this often drawn characteristic shape representing the mythical princess asterism, after η Andromedae.
The system is a spectroscopic binary whose primary is classified as an orange K-typegiant with a mean apparent magnitude of +4.08. Due to brightness changes caused by the ellipsoidal shape of that object, the system is also an RS Canum Venaticorum-typevariable star. Its brightness varies from magnitude +3.92 to +4.14 with a period of 17.77 days, and its spectrum shows strong and variable Ca II H and K lines.[3] The orbital period of the binary is 17.77 days.
Direct imaging
The primary component of this binary system, Zeta Andromedae Aa, is one of the few stars who has been imaged directly using Doppler imaging and long-baseline infrared interferometry. With direct imaging we can recover additional information about this star.
Direct imaging also allowed observation of starspots (the analogue to sunspots), on this star, and their asymmetric distribution showed that the magnetic field of the star is generated by a mechanism different from the solar dynamo.[9] A Sun-like differential rotation of the star was observed instead.[3]
Visual companions
The WDS notes three visual companions to the eclipsing binary (Aa and Ab, forming binary A).[4] The parallax of the D star has been measured by Gaia proving its distance to be much greater than Zeta Andromedae, probably a distant red giant.[10] The closest companion, B, is likewise a background object.[11] The companion C at 97″ shares a common proper motion and a similar parallax.[12]
Multiple/double star designation: WDS 00473+2416[13]
^Azimuthal angle between the rotational axis and our line of sight
^Longitudinal angle between the north pole and the East direction
References
^ abcdeVan Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ abzet And, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line August 29, 2008.
^ abcdefghijkKővári, Zs.; Bartus, J.; Strassmeier, K. G.; Oláh, K.; Weber, M.; Rice, J. B.; Washuettl, A. (2007). "Doppler imaging of stellar surface structure. XXIII. The ellipsoidal K giant binary ζ Andromedae". Astronomy and Astrophysics. 463 (3): 1071. Bibcode:2007A&A...463.1071K. doi:10.1051/0004-6361:20065982.
^ abcdHR 215, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line August 29, 2008.
^Karataș, Yüksel; Bilir, Selçuk; Eker, Zeki; Demircan, Osman; Liebert, James; Hawley, Suzanne L.; Fraser, Oliver J.; Covey, Kevin R.; Lowrance, Patrick; Kirkpatrick, J. Davy; Burgasser, Adam J. (2004). "Kinematics of chromospherically active binaries and evidence of an orbital period decrease in binary evolution". Monthly Notices of the Royal Astronomical Society. 349 (3): 1069–1092. arXiv:astro-ph/0404219. Bibcode:2004MNRAS.349.1069K. doi:10.1111/j.1365-2966.2004.07588.x. S2CID 15290475.
^ abKorhonen, H.; Wittkowski, M.; Kovári, Zs.; Granzer, Th.; Hackman, T.; Strassmeier, K. G. (2010). "Ellipsoidal primary of the RS CVn binary ζ Andromedae . Investigation using high-resolution spectroscopy and optical interferometry". Astronomy and Astrophysics. 515: A14. arXiv:1002.4201. Bibcode:2010A&A...515A..14K. doi:10.1051/0004-6361/200913736. S2CID 118683792.
^Strassmeier, Klaus G. (September 2009), "Starspots", The Astronomy and Astrophysics Review, 17 (3): 251–308, Bibcode:2009A&ARv..17..251S, doi:10.1007/s00159-009-0020-6
^Kővári, Zsolt; Oláh, Katalin; Bartus, János; Strassmeier, Klaus G.; Granzer, Thomas (August 2006). "Spot Modelling of ζ Andromedae" (PDF). Astrophysics and Space Science. 304: 55–57. doi:10.1007/s10509-006-9073-4. Retrieved 9 August 2022.
^ abRoettenbacher, R.M.; Monnier, J.D.; Korhonen, H.; Aarnio, A.N.; Baron, F.; Che, X.; Harmon, R.O.; Kővári, Zs.; Kraus, S.; Schaefer, G.H.; Torres, G.; Zhao, M.; Ten Brummelaar, T.A.; Sturmann, J.; Sturmann, L. (2016). "No Sun-like dynamo on the active star ζ Andromedae from starspot asymmetry". Nature. 533 (7602): 217–220. arXiv:1709.10107. Bibcode:2016Natur.533..217R. doi:10.1038/nature17444. PMID 27144357. S2CID 4466687.
^Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
^Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
^Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
^(in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日
External links
Zeta Andromedae at Alcyone Software's Star Data Pages
Image ζ Andromedae
Rachael Roettenbacher, "How the face of a distant star reveals our place in the cosmos," Aeon Magazine [retrieved July 27, 2016]
January 10, 2023
zeta, andromedae, zeta, andromedae, star, system, constellation, andromeda, approximately, light, years, from, earth, andromedaelocation, andromedaeobservation, dataepoch, j2000, equinox, j2000, icrs, constellation, andromedaright, ascension, 32547s, declinati. Zeta Andromedae Zeta And z Andromedae z And is a star system in the constellation Andromeda It is approximately 189 light years from Earth z AndromedaeLocation of z AndromedaeObservation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation AndromedaRight ascension 00h 47m 20 32547s 1 Declination 24 16 01 8408 1 Apparent magnitude V 3 92 to 4 14 2 CharacteristicsSpectral type K1III KV 3 U B color index 0 90 4 B V color index 1 12 4 R I color index 0 59 4 Variable type ELL RS 2 AstrometryRadial velocity Rv 24 43 0 1 5 km sProper motion m RA 101 17 1 mas yr Dec 81 77 1 mas yrParallax p 17 24 0 26 mas 1 Distance189 3 ly 58 0 0 9 pc Absolute magnitude MV 0 14 3 Orbit 3 Period P 17 769426Semi major axis a 2 7 R Eccentricity e 0 0Inclination i 65 5 DetailsAaMass2 6 0 4 3 M Radius15 9 0 8 6 R Luminosity95 5 3 L Surface gravity log g 2 8 3 cgsTemperature4 665 140 6 KMetallicity Fe H 0 30 3 dexRotation17 77 days 7 Rotational velocity v sin i 41 4 0 2 3 km sAbMass0 75 3 M Other designationsz And Zeta Andromedae Zeta And 34 Andromedae 34 And BD 23 106 CCDM J00473 2416A FK5 27 GC 940 HD 4502 HIP 3693 HR 215 IDS 00421 2344 A PPM 90149 SAO 74267 WDS 00473 2416A Database referencesSIMBADdataZeta Andromedae is the star s Bayer designation It also has the Flamsteed designation 34 Andromedae and multiple other designations in stellar catalogues Contents 1 Location 2 System 3 Direct imaging 4 Visual companions 5 Naming 6 Notes 7 References 8 External linksLocation Edit Sidney Hall Urania s Mirror Gloria Frederici Andromeda and Triangula north is to the left The star s location is in the northern constellation Andromeda in which it is the second most southerly of the stars in this often drawn characteristic shape representing the mythical princess asterism after h Andromedae System Edit A visual band light curve for Zeta Andromedae adapted from Kovari et al 2006 8 The system is a spectroscopic binary whose primary is classified as an orange K type giant with a mean apparent magnitude of 4 08 Due to brightness changes caused by the ellipsoidal shape of that object the system is also an RS Canum Venaticorum type variable star Its brightness varies from magnitude 3 92 to 4 14 with a period of 17 77 days and its spectrum shows strong and variable Ca II H and K lines 3 The orbital period of the binary is 17 77 days Direct imaging EditThe primary component of this binary system Zeta Andromedae Aa is one of the few stars who has been imaged directly using Doppler imaging and long baseline infrared interferometry With direct imaging we can recover additional information about this star Additional star parameters 9 Parameter ValueOblateness 1 060 0 011Polar radius 15 0 0 8 R Axis Inclination a 70 0 2 8 Pole angle b 126 1 9 Direct imaging also allowed observation of starspots the analogue to sunspots on this star and their asymmetric distribution showed that the magnetic field of the star is generated by a mechanism different from the solar dynamo 9 A Sun like differential rotation of the star was observed instead 3 Visual companions EditThe WDS notes three visual companions to the eclipsing binary Aa and Ab forming binary A 4 The parallax of the D star has been measured by Gaia proving its distance to be much greater than Zeta Andromedae probably a distant red giant 10 The closest companion B is likewise a background object 11 The companion C at 97 shares a common proper motion and a similar parallax 12 Multiple double star designation WDS 00473 2416 13 Component Primary Rightascension a Equinox J2000 0 Declination d Equinox J2000 0 Epoch ofobservedseparation Angulardistancefromprimary Positionangle relativeto primary Apparent magnitude V DatabasereferenceB A00h 47m 20 2s 24 16 33 1959 32 6 0 15 3C A00h 47m 15 2s 24 15 03 1997 97 0 231 13 6D A00h 47m 09 0s 24 15 33 2006 155 5 260 10 80SIMBADNaming EditIn Chinese 奎宿 Kui Su meaning Legs asterism refers to an asterism consisting of z Andromedae h Andromedae 65 Piscium e Andromedae d Andromedae p Andromedae n Andromedae m Andromedae b Andromedae s Piscium t Piscium 91 Piscium y Piscium f Piscium x Piscium and ps1 Piscium Consequently the Chinese name for z Andromedae itself is 奎宿二 Kui Su er English the Second Star of Legs 14 Notes Edit Azimuthal angle between the rotational axis and our line of sight Longitudinal angle between the north pole and the East directionReferences Edit a b c d e Van Leeuwen F 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 a b zet And database entry The combined table of GCVS Vols I III and NL 67 78 with improved coordinates General Catalogue of Variable Stars Sternberg Astronomical Institute Moscow Russia Accessed on line August 29 2008 a b c d e f g h i j k Kovari Zs Bartus J Strassmeier K G Olah K Weber M Rice J B Washuettl A 2007 Doppler imaging of stellar surface structure XXIII The ellipsoidal K giant binary z Andromedae Astronomy and Astrophysics 463 3 1071 Bibcode 2007A amp A 463 1071K doi 10 1051 0004 6361 20065982 a b c d HR 215 database entry The Bright Star Catalogue 5th Revised Ed Preliminary Version D Hoffleit and W H Warren Jr CDS ID V 50 Accessed on line August 29 2008 Karataș Yuksel Bilir Selcuk Eker Zeki Demircan Osman Liebert James Hawley Suzanne L Fraser Oliver J Covey Kevin R Lowrance Patrick Kirkpatrick J Davy Burgasser Adam J 2004 Kinematics of chromospherically active binaries and evidence of an orbital period decrease in binary evolution Monthly Notices of the Royal Astronomical Society 349 3 1069 1092 arXiv astro ph 0404219 Bibcode 2004MNRAS 349 1069K doi 10 1111 j 1365 2966 2004 07588 x S2CID 15290475 a b Korhonen H Wittkowski M Kovari Zs Granzer Th Hackman T Strassmeier K G 2010 Ellipsoidal primary of the RS CVn binary z Andromedae Investigation using high resolution spectroscopy and optical interferometry Astronomy and Astrophysics 515 A14 arXiv 1002 4201 Bibcode 2010A amp A 515A 14K doi 10 1051 0004 6361 200913736 S2CID 118683792 Strassmeier Klaus G September 2009 Starspots The Astronomy and Astrophysics Review 17 3 251 308 Bibcode 2009A amp ARv 17 251S doi 10 1007 s00159 009 0020 6 Kovari Zsolt Olah Katalin Bartus Janos Strassmeier Klaus G Granzer Thomas August 2006 Spot Modelling of z Andromedae PDF Astrophysics and Space Science 304 55 57 doi 10 1007 s10509 006 9073 4 Retrieved 9 August 2022 a b Roettenbacher R M Monnier J D Korhonen H Aarnio A N Baron F Che X Harmon R O Kovari Zs Kraus S Schaefer G H Torres G Zhao M Ten Brummelaar T A Sturmann J Sturmann L 2016 No Sun like dynamo on the active star z Andromedae from starspot asymmetry Nature 533 7602 217 220 arXiv 1709 10107 Bibcode 2016Natur 533 217R doi 10 1038 nature17444 PMID 27144357 S2CID 4466687 Vallenari A et al Gaia Collaboration 2022 Gaia Data Release 3 Summary of the content and survey properties Astronomy amp Astrophysics arXiv 2208 00211 doi 10 1051 0004 6361 202243940 Gaia DR3 record for this source at VizieR Vallenari A et al Gaia Collaboration 2022 Gaia Data Release 3 Summary of the content and survey properties Astronomy amp Astrophysics arXiv 2208 00211 doi 10 1051 0004 6361 202243940 Gaia DR3 record for this source at VizieR Vallenari A et al Gaia Collaboration 2022 Gaia Data Release 3 Summary of the content and survey properties Astronomy amp Astrophysics arXiv 2208 00211 doi 10 1051 0004 6361 202243940 Gaia DR3 record for this source at VizieR Entry 00473 2416 The Washington Double Star Catalog Archived April 12 2008 at the Wayback Machine United States Naval Observatory Accessed on line August 29 2008 in Chinese AEEA Activities of Exhibition and Education in Astronomy 天文教育資訊網 2006 年 5 月 19 日External links EditZeta Andromedae at Alcyone Software s Star Data Pages Image z Andromedae Rachael Roettenbacher How the face of a distant star reveals our place in the cosmos Aeon Magazine retrieved July 27 2016 Retrieved from https en wikipedia org w index php title Zeta Andromedae amp oldid 1103459404, wikipedia, wiki, book, books, library,
