The two stars of ι Cancri are separated by 30 arcseconds, changing only slowly. Although no orbit has been derived, the two stars show a large common proper motion and are assumed to be gravitationally related.[12]
The brighter star, ι Cancri A, is a yellow G-typegiant with an apparent magnitude of +4.02. It is a mild barium star, thought to be formed by mass transfer of enriched material from an asymptotic giant branch star onto a less evolved companion. No such donor has been detected in the ι Cancri system, but it is assumed that there is an unseen white dwarf.[13]
The fainter of the two stars, ι Cancri B, is a white A-typemain sequence dwarf with an apparent magnitude of +6.57. It is a shell star, surrounded by material expelled by its rapid rotation.[14]
ReferencesEdit
^ abcdefghijVan 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.
^Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
^Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
^Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
^Grenier, S.; Baylac, M.-O.; Rolland, L.; Burnage, R.; Arenou, F.; Briot, D.; Delmas, F.; Duflot, M.; Genty, V.; Gómez, A. E.; Halbwachs, J.-L.; Marouard, M.; Oblak, E.; Sellier, A. (1999). "Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS" (PDF). Astronomy and Astrophysics Supplement. 137 (3): 451. Bibcode:1999A&AS..137..451G. doi:10.1051/aas:1999489.
^ abcdeMassarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity". The Astronomical Journal. 135 (1): 209–231. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209.
^ abKovtyukh, V. V.; Chekhonadskikh, F. A.; Luck, R. E.; Soubiran, C.; Yasinskaya, M. P.; Belik, S. I. (2010). "Accurate luminosities for F-G supergiants from FeII/FeI line depth ratios". Monthly Notices of the Royal Astronomical Society. 408 (3): 1568. Bibcode:2010MNRAS.408.1568K. doi:10.1111/j.1365-2966.2010.17217.x.
^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.
^ abTakeda, Yoichi; Sato, Bun'ei; Murata, Daisuke (2008). "Stellar Parameters and Elemental Abundances of Late-G Giants". Publications of the Astronomical Society of Japan. 60 (4): 781. arXiv:0805.2434. Bibcode:2008PASJ...60..781T. doi:10.1093/pasj/60.4.781. S2CID 16258166.
^Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i". Astronomy and Astrophysics. 393 (3): 897–912. arXiv:astro-ph/0205255. Bibcode:2002A&A...393..897R. doi:10.1051/0004-6361:20020943. S2CID 14070763.
^ abMcDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
^Eggen, Olin J. (1994). "Photometry of F-K type bright giants and supergiants. 3: The luminosity, reddening, and heavy element abundance of GK stars". The Astronomical Journal. 107: 2184. Bibcode:1994AJ....107.2184E. doi:10.1086/117030.
^Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
^Hauck, B.; Jaschek, C. (2000). "A-shell stars in the Geneva system". Astronomy and Astrophysics. 354: 157. Bibcode:2000A&A...354..157H.
August 31, 2023
iota, cancri, cancri, double, star, constellation, cancer, approximately, light, years, from, earth, cancrilocation, cancri, circled, observation, dataepoch, j2000, equinox, j2000, 0constellation, cancerι, aright, ascension, 81988s, declination, 6190, apparent. Iota Cancri i Cnc i Cancri is a double star in the constellation Cancer approximately 300 light years from Earth i CancriLocation of i Cancri circled Observation dataEpoch J2000 0 Equinox J2000 0Constellation Canceri Cnc ARight ascension 08h 46m 41 81988s 1 Declination 28 45 35 6190 1 Apparent magnitude V 4 02 2 i Cnc BRight ascension 08h 46m 39 98118s 1 Declination 28 45 54 1932 1 Apparent magnitude V 6 57 3 CharacteristicsSpectral type G8IIIa Ba0 2 4 A2V 5 Astrometryi Cnc ARadial velocity Rv 15 74 0 13 6 km sProper motion m RA 21 58 0 75 1 mas yr Dec 45 69 0 56 1 mas yrParallax p 9 85 0 61 mas 1 Distance330 20 ly 102 6 pc Absolute magnitude MV 0 79 7 i Cnc BRadial velocity Rv 25 00 1 5 8 km sProper motion m RA 22 74 3 45 1 mas yr Dec 46 36 2 56 1 mas yrParallax p 11 69 2 75 mas 1 Distanceapprox 280 ly approx 90 pc Detailsi Cnc AMass3 43 9 M Radius21 6 R Luminosity204 6 L Surface gravity log g 2 5 6 cgsTemperature4 954 7 KMetallicity Fe H 0 14 6 dexRotational velocity v sin i 170 10 km si Cnc BLuminosity14 39 11 L Temperature8 786 11 KAge263 9 MyrOther designations48 CancriIota Cancri A HR 3475 HD 74739 BD 29 1824 HIP 43103 SAO 80416Iota Cancri B HR 3474 HD 74738 BD 29 1823 HIP 43100 SAO 80415Database referencesSIMBADdatai Cancri A and B Jeffrey Fisher The two stars of i Cancri are separated by 30 arcseconds changing only slowly Although no orbit has been derived the two stars show a large common proper motion and are assumed to be gravitationally related 12 The brighter star i Cancri A is a yellow G type giant with an apparent magnitude of 4 02 It is a mild barium star thought to be formed by mass transfer of enriched material from an asymptotic giant branch star onto a less evolved companion No such donor has been detected in the i Cancri system but it is assumed that there is an unseen white dwarf 13 The fainter of the two stars i Cancri B is a white A type main sequence dwarf with an apparent magnitude of 6 57 It is a shell star surrounded by material expelled by its rapid rotation 14 References Edit a b c d e f g h i j 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 Mermilliod J C 1986 Compilation of Eggen s UBV data transformed to UBV unpublished Catalogue of Eggen s UBV Data Bibcode 1986EgUBV 0M Ducati J R 2002 VizieR Online Data Catalog Catalogue of Stellar Photometry in Johnson s 11 color system CDS ADC Collection of Electronic Catalogues 2237 Bibcode 2002yCat 2237 0D Keenan Philip C McNeil Raymond C 1989 The Perkins catalog of revised MK types for the cooler stars Astrophysical Journal Supplement Series 71 245 Bibcode 1989ApJS 71 245K doi 10 1086 191373 Grenier S Baylac M O Rolland L Burnage R Arenou F Briot D Delmas F Duflot M Genty V Gomez A E Halbwachs J L Marouard M Oblak E Sellier A 1999 Radial velocities Measurements of 2800 B2 F5 stars for HIPPARCOS PDF Astronomy and Astrophysics Supplement 137 3 451 Bibcode 1999A amp AS 137 451G doi 10 1051 aas 1999489 a b c d e Massarotti Alessandro Latham David W Stefanik Robert P Fogel Jeffrey 2008 Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity The Astronomical Journal 135 1 209 231 Bibcode 2008AJ 135 209M doi 10 1088 0004 6256 135 1 209 a b Kovtyukh V V Chekhonadskikh F A Luck R E Soubiran C Yasinskaya M P Belik S I 2010 Accurate luminosities for F G supergiants from FeII FeI line depth ratios Monthly Notices of the Royal Astronomical Society 408 3 1568 Bibcode 2010MNRAS 408 1568K doi 10 1111 j 1365 2966 2010 17217 x 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 a b Takeda Yoichi Sato Bun ei Murata Daisuke 2008 Stellar Parameters and Elemental Abundances of Late G Giants Publications of the Astronomical Society of Japan 60 4 781 arXiv 0805 2434 Bibcode 2008PASJ 60 781T doi 10 1093 pasj 60 4 781 S2CID 16258166 Royer F Grenier S Baylac M O Gomez A E Zorec J 2002 Rotational velocities of A type stars in the northern hemisphere II Measurement of v sin i Astronomy and Astrophysics 393 3 897 912 arXiv astro ph 0205255 Bibcode 2002A amp A 393 897R doi 10 1051 0004 6361 20020943 S2CID 14070763 a b McDonald I Zijlstra A A Boyer M L 2012 Fundamental parameters and infrared excesses of Hipparcos stars Monthly Notices of the Royal Astronomical Society 427 1 343 357 arXiv 1208 2037 Bibcode 2012MNRAS 427 343M doi 10 1111 j 1365 2966 2012 21873 x S2CID 118665352 Eggen Olin J 1994 Photometry of F K type bright giants and supergiants 3 The luminosity reddening and heavy element abundance of GK stars The Astronomical Journal 107 2184 Bibcode 1994AJ 107 2184E doi 10 1086 117030 Eggleton P P Tokovinin A A 2008 A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869 arXiv 0806 2878 Bibcode 2008MNRAS 389 869E doi 10 1111 j 1365 2966 2008 13596 x S2CID 14878976 Hauck B Jaschek C 2000 A shell stars in the Geneva system Astronomy and Astrophysics 354 157 Bibcode 2000A amp A 354 157H Retrieved from https en wikipedia org w index php title Iota Cancri amp oldid 1171256350, wikipedia, wiki, book, books, library,