1 Del consists of three components. The brightest of them has a magnitude of 6.1; a companion located around 0.9 arcseconds from the primary has an apparent magnitude of 8.1; and a third star, located much farther away at around 17 arcseconds from component A, is the faintest with a magnitude of around 14 and is an unrelated background object.[11]
Due to the stability of the emission lines data from 1 Delphini has been used for developing models of shell stars and Be stars.[10]
Referencesedit
^ abcdBrown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ abFabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (March 2002). "The Tycho double star catalogue". Astronomy & Astrophysics. 384 (1): 180–189. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822. ISSN 0004-6361.
^ abcdeBrown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182. ISSN 0067-0049.
^ abDucati, 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.
^Ralph Elmer Wilson (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W. LCCN 54001336.
^ abcdeAnders, F.; et al. (February 2022). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111.01860. Bibcode:2022A&A...658A..91A. doi:10.1051/0004-6361/202142369. ISSN 0004-6361.
^ abcGontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. ISSN 0320-0108. S2CID 255201789.
^ abcdeKubát, Jiří; Kubátová, Brankica; Doležalová, Barbora; Iliev, Lubomir; Šlechta, Miroslav (2016). "Spectroscopy of close visual binary components of the stable shell star 1 Delphini". Astronomy and Astrophysics. 587: A22. arXiv:1601.05236. Bibcode:2016A&A...587A..22K. doi:10.1051/0004-6361/201526414. S2CID 118706088.
^Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
Further readingedit
Merrill, Paul W.; Burwell, Cora G. (November 1949). "Second Supplement to the Mount Wilson Catalogue and Bibliography of Stars of Classes B and a whose Spectra have Bright Hydrogen Lines". The Astrophysical Journal. 110: 387. Bibcode:1949ApJ...110..387M. doi:10.1086/145215. eISSN 1538-4357. ISSN 0004-637X.
Merrill, Paul W. (January 1952). "Spectra of Two Stars with Stable Shells". The Astrophysical Journal. 115: 42. Bibcode:1952ApJ...115...42M. doi:10.1086/145507. eISSN 1538-4357. ISSN 0004-637X.
van den Bos, W. H. (February 1958). "Micrometer measures of double stars". The Astronomical Journal. 63: 63. Bibcode:1958AJ.....63...63V. doi:10.1086/107694. ISSN 0004-6256.
Ringuelet-Kaswalder, Adela E. (August 1963). "Shell Stars and Rotationally Unstable Be Stars". Publications of the Astronomical Society of the Pacific. 75 (445): 323. Bibcode:1963PASP...75..323R. doi:10.1086/127960. eISSN 1538-3873. ISSN 0004-6280.
Gray, David F.; Marlborough, J. M. (March 1974). "Photoelectric Profile Measurements of Halpha and Hbeta in be Stars". The Astrophysical Journal Supplement Series. 27: 121. Bibcode:1974ApJS...27..121G. doi:10.1086/190291. eISSN 1538-4365. ISSN 0067-0049.
May 04, 2024
delphini, flamsteed, designation, close, binary, star, equatorial, constellation, delphinus, with, combined, apparent, magnitude, barely, visible, naked, even, under, ideal, conditions, parallax, measurements, components, distance, light, years, respectively, . 1 Delphini 1 Del is the Flamsteed designation for a close binary star in the equatorial constellation Delphinus With a combined apparent magnitude of 6 08 it is barely visible to the naked eye even under ideal conditions Parallax measurements put the components at a distance 703 and 780 light years respectively However its approaching the Solar System with a radial velocity of 15 km s 1 DelphiniLocation of 1 Delphini circled Observation dataEpoch J2000 Equinox J2000 Constellation Delphinus A Right ascension 20h 30m 17 9623s 1 Declination 10 53 45 335 1 Apparent magnitude V 6 20 0 01 2 B Right ascension 20h 30m 17 9505s 3 Declination 10 53 46 244 3 Apparent magnitude V 8 00 0 01 2 Characteristics Spectral type A1 III shell 4 U B color index 0 11 5 B V color index 0 03 5 AstrometryRadial velocity Rv 15 5 2 6 km sAbsolute magnitude MV 0 69 7 AProper motion m RA 19 320 mas yr 1 Dec 4 645 mas yr 1 Parallax p 4 6400 0 0616 mas 1 Distance703 9 ly 216 3 pc BProper motion m RA 19 545 3 mas yr Dec 4 710 3 mas yrParallax p 4 1851 0 1421 mas 3 Distance780 30 ly 239 8 pc DetailsAMass3 1 0 3 8 M Surface gravity log g 3 66 0 77 8 cgsTemperature10 651 932 1156 8 KMetallicity Fe H 0 00 9 dexRotational velocity v sin i 217 10 km sAge246 9 MyrBSurface gravity log g 4 14 0 19 0 47 8 cgsRotational velocity v sin i 370 10 km s Other designations1 Delphini BD 10 4303 HD 195325 HIP 101160 HR 7836 SAO 106172 WDS J20303 1054AB Database referencesSIMBADdata 1 Del consists of three components The brightest of them has a magnitude of 6 1 a companion located around 0 9 arcseconds from the primary has an apparent magnitude of 8 1 and a third star located much farther away at around 17 arcseconds from component A is the faintest with a magnitude of around 14 and is an unrelated background object 11 The entire system has a stellar classification of A1 III sh indicating that it is a white giant a shell star However there is some uncertainty about the temperature class When resolved the secondary has a class of B9 1 Del A has 3 times the mass of the Sun and an effective temperature of 10 651 K 8 giving it a bluish white glow It is estimated to be almost 250 million years old and has a solar metallicity 9 Both components spin rapidly with projected rotational velocities of 217 and 370 km s respectively 10 As for the peculiarities the shell star is a primary component the spectrum of the secondary shows broad absorption lines 10 Due to the stability of the emission lines data from 1 Delphini has been used for developing models of shell stars and Be stars 10 References edit a b c d Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR a b Fabricius C Hog E Makarov V V Mason B D Wycoff G L Urban S E March 2002 The Tycho double star catalogue Astronomy amp Astrophysics 384 1 180 189 Bibcode 2002A amp A 384 180F doi 10 1051 0004 6361 20011822 ISSN 0004 6361 a b c d e Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR Abt Helmut A Morrell Nidia I July 1995 The Relation between Rotational Velocities and Spectral Peculiarities among A Type Stars The Astrophysical Journal Supplement Series 99 135 Bibcode 1995ApJS 99 135A doi 10 1086 192182 ISSN 0067 0049 a b 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 Ralph Elmer Wilson 1953 General Catalogue of Stellar Radial Velocities Carnegie Institute Washington D C Publication Carnegie Institution of Washington Bibcode 1953GCRV C 0W LCCN 54001336 Anderson E Francis Ch May 2012 XHIP An extended hipparcos compilation Astronomy Letters 38 5 331 346 arXiv 1108 4971 Bibcode 2012AstL 38 331A doi 10 1134 S1063773712050015 ISSN 1063 7737 S2CID 255204555 a b c d e Anders F et al February 2022 Photo astrometric distances extinctions and astrophysical parameters for Gaia EDR3 stars brighter than G 18 5 Astronomy amp Astrophysics 658 A91 arXiv 2111 01860 Bibcode 2022A amp A 658A 91A doi 10 1051 0004 6361 202142369 ISSN 0004 6361 a b c Gontcharov G A December 2012 Dependence of kinematics on the age of stars in the solar neighborhood Astronomy Letters 38 12 771 782 arXiv 1606 08814 Bibcode 2012AstL 38 771G doi 10 1134 S1063773712120031 ISSN 0320 0108 S2CID 255201789 a b c d e Kubat Jiri Kubatova Brankica Dolezalova Barbora Iliev Lubomir Slechta Miroslav 2016 Spectroscopy of close visual binary components of the stable shell star 1 Delphini Astronomy and Astrophysics 587 A22 arXiv 1601 05236 Bibcode 2016A amp A 587A 22K doi 10 1051 0004 6361 201526414 S2CID 118706088 Brown A G A et al Gaia collaboration 2021 Gaia Early Data Release 3 Summary of the contents and survey properties Astronomy amp Astrophysics 649 A1 arXiv 2012 01533 Bibcode 2021A amp A 649A 1G doi 10 1051 0004 6361 202039657 S2CID 227254300 Erratum doi 10 1051 0004 6361 202039657e Gaia EDR3 record for this source at VizieR Further reading editMerrill Paul W Burwell Cora G November 1949 Second Supplement to the Mount Wilson Catalogue and Bibliography of Stars of Classes B and a whose Spectra have Bright Hydrogen Lines The Astrophysical Journal 110 387 Bibcode 1949ApJ 110 387M doi 10 1086 145215 eISSN 1538 4357 ISSN 0004 637X Merrill Paul W January 1952 Spectra of Two Stars with Stable Shells The Astrophysical Journal 115 42 Bibcode 1952ApJ 115 42M doi 10 1086 145507 eISSN 1538 4357 ISSN 0004 637X van den Bos W H February 1958 Micrometer measures of double stars The Astronomical Journal 63 63 Bibcode 1958AJ 63 63V doi 10 1086 107694 ISSN 0004 6256 Ringuelet Kaswalder Adela E August 1963 Shell Stars and Rotationally Unstable Be Stars Publications of the Astronomical Society of the Pacific 75 445 323 Bibcode 1963PASP 75 323R doi 10 1086 127960 eISSN 1538 3873 ISSN 0004 6280 Gray David F Marlborough J M March 1974 Photoelectric Profile Measurements of Halpha and Hbeta in be Stars The Astrophysical Journal Supplement Series 27 121 Bibcode 1974ApJS 27 121G doi 10 1086 190291 eISSN 1538 4365 ISSN 0067 0049 Retrieved from https en wikipedia org w index php title 1 Delphini amp oldid 1154751440, wikipedia, wiki, book, books, library,
