CQ Tauri

CQ Tauri
Observationsdata
Epok: J2000.0
StjärnbildOxen
Rektascension05t 35m 58,467s[1]
Deklination+24° 44′ 54,09 ″[1]
Skenbar magnitud ()+10,48[2] (8,7 – 12,25)[3]
Stjärntyp
SpektraltypF5 IVe[4]
B–V+0,696 ± 0,091[2]
VariabeltypOrion-variabel[3]
Astrometri
Radialhastighet ()+22,60 ± 2,7[5] km/s
Egenrörelse (µ)RA: +2,987[1] mas/år
Dek.: -26,364[1] mas/år
Parallax ()6,6946 ± 0,0600[1]
Avstånd487 ± 4  (149 ± 1 pc)
Absolut magnitud ()+5,92[6]
Detaljer
Massa1,67[7] M
Radie1,7[8] R
Luminositet10[7] L
Temperatur6 900[7] K
Metallicitet+0,14[9]
Vinkelhastighet105,0 ± 5,0[4] km/s
Ålder10[7] miljoner år
Andra beteckningar
HD 36910, AG+24 513, AKARI-FIS-V1, J0535587+244500, BD+24 873, GSC 01865-01798, HIC 26295, HIP 26295, IRAS 05328+2443, 2MASS J05355845+2444542, PPM 94541, SAO 77299, TYC 1865-1798-1, UCAC2 40478814, CQ Tauri, Gaia DR3 3416747570320423552, Gaia DR1 3416747570320423552, Gaia DR2 3416747570320423552[10][11]

CQ Tauri eller HD 36910, är en ensam stjärna belägen i den mellersta delen av stjärnbilden Oxen. Den har en genomsnittlig skenbar magnitud av ca 10,48 [2] och kräver ett teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 3 på ca 6,69 mas,[1] beräknas den befinna sig på ett avstånd på ca 487 ljusår (149 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 23 km/s.[5] Stjärnan tycks ingå i T-föreningen Tauri 4[6] och ligger tillräckligt nära ekliptikan för att kunna undergå ockultation av månen.[12]

Observation

CQ Tauri rapporterades oberoende som en variabel av Artjukinov 1948 och C. Hoffmeister 1949.[13] Hoffmeister klassificerade den som en medlem av RW Aurigae-liknande variabler med en ljusstyrka som sträckte sig från en skenbar visuell magnitud på 8,7 ner till 10,5,[14] vilket gör den till en av de ljusaste stjärnorna av den typen.[13] G. H. Herbig fann 1960 en spektralklass av F2 för stjärnan,[15] och 1973 klassificerades den som en Orion-variabel av typen T Tauri.[16] År 1968 upptäckte W. Götz och W. Wenzel en svag emission av blått ljus som kom från systemet.[17]

Ljuskurva i synliga bandet för CQ Tauri, plottad från INTEGRAL OMC-data.[18]

Spektralbilder av systemet 1973 visade dubbla emissionslinjer på en stjärna av F-typ.[19] Den visade sig vara en infraröd källa av IRAS och förbunden med nebulositet, vilket gjorde att den 1994 kunde katalogiseras som en Herbig-Ae/Be-stjärna av P. S. Thé et al.[20] Stjärnan genomgår oregelbundna sänkningar av ljusstyrkan som annars liknar en Algol-liknande variation. Den omges av en inhomogen ackretionsskiva, som är källan till emissionslinjerna.[21]

Egenskaper

CQ Tauri är en gul till vit underjättestjärna före huvudserien[22] av spektralklass F5 IVe.[4] Den har en massa som är lika med ca 1,7[7] solmassa, en radie som är ca 1,7[8] solradie och utsänder energi från dess fotosfär motsvarande ca 10 gånger solen[7] vid en effektiv temperatur av ca 6 900 K.[7]

Simuleringar avsedda att reproducera fördelningen av den omgivande stoftskivan tyder på att en inbäddad exoplanet med en massa på 6–9 jupitermassor kretsar kring stjärnan på ett avstånd av ca 20 AE.[7] Nära infraröda observationer 2018 visar en spiralstruktur i skivan som överensstämmer med närvaron av en omkretsande exoplanet, nen ingen planet har upptäckts (2023).[23]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, CQ Tauri, 27 februari 2023..

Noter

  1. ^ [a b c d e f] 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.
  2. ^ [a b c] 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.
  3. ^ [a b] Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
  4. ^ [a b c] Mora, A.; et al. (2001), "EXPORT: Spectral classification and projected rotational velocities of Vega-type and pre-main sequence stars", Astronomy & Astrophysics, 378 (1): 116–131, Bibcode:2001A&A...378..116M, doi:10.1051/0004-6361:20011098.
  5. ^ [a b] Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 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.
  6. ^ [a b] Alecian, E.; et al. (February 2013), "A high-resolution spectropolarimetric survey of Herbig Ae/Be stars - I. Observations and measurements", Monthly Notices of the Royal Astronomical Society, 429 (2): 1001–1026, arXiv:1211.2907, Bibcode:2013MNRAS.429.1001A, doi:10.1093/mnras/sts383.
  7. ^ [a b c d e f g h] Giulia Ubeira Gabellini, M.; et al. (July 2019), "A dust and gas cavity in the disc around CQ Tau revealed by ALMA", Monthly Notices of the Royal Astronomical Society, 486 (4): 4638–4654, arXiv:1905.00909, Bibcode:2019MNRAS.486.4638U, doi:10.1093/mnras/stz1138.
  8. ^ [a b] Stassun, Keivan G.; et al. (September 9, 2019), "The Revised TESS Input Catalog and Candidate Target List", The Astronomical Journal, 158 (4): 138, arXiv:1905.10694, Bibcode:2019AJ....158..138S, doi:10.3847/1538-3881/ab3467, ISSN 0004-6256.
  9. ^ Bochanski, John J.; et al. (March 13, 2018), "Fundamental Properties of Co-moving Stars Observed by Gaia", The Astronomical Journal, 155 (4): 149, arXiv:1801.00537, Bibcode:2018AJ....155..149B, doi:10.3847/1538-3881/aaaebe, ISSN 0004-6256, S2CID 119256051.
  10. ^ CQ Tau (unistra.fr). Hämtad 2023-11-17.
  11. ^ "CQ Tau", SIMBAD, Centre de données astronomiques de Strasbourg, hämtad 2022-06-24.
  12. ^ Cassar, L.; et al. (March 1989), "Lunar Occultations of IRAS Point Sources, 1991--2000", Astrophysical Journal Supplement, 69: 651, Bibcode:1989ApJS...69..651C, doi:10.1086/191323. See table p. 658, IRAS 05328+2443.
  13. ^ [a b] Ashbrook, J. (August 1950), "HD 36910: a bright variable of the RW Aurigae type", Astronomical Journal, 55: 148, Bibcode:1950AJ.....55..148A, doi:10.1086/106374.
  14. ^ Hoffmeister, Cuno (November 1949), "Die RW Aurigae-Sterne und ihre Nebenformen", Astronomische Nachrichten (in German), 278: 24, Bibcode:1949AN....278...24H, doi:10.1002/asna.19492780102. Listed as "S 3942 Tau".
  15. ^ Herbig, G. H. (May 1960), "Spectral Classifications for 112 Variable Stars", Astrophysical Journal, 131: 632, Bibcode:1960ApJ...131..632H, doi:10.1086/146876.
  16. ^ Cohen, M. (1973), "Infra-red observations of young stars - II. T Tauri stars and the Orion population", Monthly Notices of the Royal Astronomical Society, 161: 97, Bibcode:1973MNRAS.161...97C, doi:10.1093/mnras/161.1.97.
  17. ^ Berdyugin, A. V.; et al. (August 1990), "Discovery of high linear polarization at brightness minima of CQ Tau", Astronomicheskii Zhurnal, 67: 812, Bibcode:1990AZh....67..812B.
  18. ^ "OMC Archive". OMC Archive. The Astronomical Data Centre at CAB. Hämtad 19 december 2021.
  19. ^ Herbig, G. H.; Bell, K. Robbin (Jun 1988), "Third Catalog of Emission-Line Stars of the Orion Population", Lick Observatory Bulletin, Santa Cruz, 1111, Bibcode:1988cels.book.....H.
  20. ^ The, P. S.; et al. (April 1994), "A new catalogue of members and candidate members of the Herbig Ae/Be (HAEBE) stellar group", Astronomy and Astrophysics Supplement, 104: 315–339, Bibcode:1994A&AS..104..315T.
  21. ^ Kozlova, O. V.; et al. (January 2000), "The Accretion Activity of the Ae Herbig Star CQ Tau", Astronomy Reports, 44 (1): 36–44, Bibcode:2000ARep...44...36K, doi:10.1134/1.163821, S2CID 120162969.
  22. ^ Testi, L.; et al. (May 2003), "Large grains in the disk of CQ Tau", Astronomy and Astrophysics, 403: 323–328, arXiv:astro-ph/0303420, Bibcode:2003A&A...403..323T, doi:10.1051/0004-6361:20030362, S2CID 14936233.
  23. ^ Uyama, Taichi; et al. (March 2020), "Near-infrared Imaging of a Spiral in the CQ Tau Disk", The Astronomical Journal, 159 (3): 9, arXiv:1910.07605, Bibcode:2020AJ....159..118U, doi:10.3847/1538-3881/ab7006, S2CID 204743781, 118.

Externa länkar

Vidare läsning

  • Safonov, Boris S.; Strakhov, Ivan A.; Goliguzova, Maria V.; Voziakova, Olga V. (January 2022), ”Apparent Motion of the Circumstellar Envelope of CQ Tau in Scattered Light”, The Astronomical Journal 163 (1): 31, doi:10.3847/1538-3881/ac36cb, 31, Bibcode2022AJ....163...31S. 
  • Wölfer, L.; Facchini, S.; Kurtovic, N. T.; Teague, R.; van Dishoeck, E. F.; Benisty, M.; Ercolano, B.; Lodato, G.; et al. (April 2021), ”A highly non-Keplerian protoplanetary disc. Spiral structure in the gas disc of CQ Tau”, Astronomy & Astrophysics 648, doi:10.1051/0004-6361/202039469, A19, Bibcode2021A&A...648A..19W. 
  • Assani, K. (January 2020), ”Variability in the Gas and Dust Emission of the UX Orioni Star CQ Tau”, Bulletin of the American Astronomical Society 52 (1), Bibcode2020AAS...23545101A. 
  • Ubeira Gabellini, Maria Giulia (December 2018), ”The gas and dust disk around the CQ Tau pre-main sequence star”, Protoplanetary disks seen through the eyes of new-generation high-resolution instruments. Proceedings of the conference held 25–28 June 2018 in Rome, Italy: s. 30, doi:10.5281/zenodo.1893261, Bibcode2018ppd..confE..30U. 
  • Tax, Tomáš (November 2018), ”Asymmetric CQ-Tau Transition Disk at High Angular Resolution”, Take a Closer Look, 15–19 October 2018 in ESO-HQ, Garching b. München, Germany: s. 112, doi:10.5281/zenodo.1488994, Bibcode2018tcl..confE.112T. 
  • Shenavrin, V. I.; Grinin, V. P.; Rostopchina-Shakhovskaja, A. N.; Demidova, T. V.; Shakhovskoi, D. N. (May 2012), ”Photometric activity of UX Ori stars and related objects in the near infrared and visual. BF Ori, CQ Tau, WW Vul, and SV Cep”, Astronomy Reports 56 (5): 379–394, doi:10.1134/S1063772912040063, Bibcode2012ARep...56..379S. 
  • Chapillon, E.; Parise, B.; Guilloteau, S.; Dutrey, A.; Wakelam, V. (September 2010), ”C I observations in the CQ Tauri proto-planetary disk: evidence of a very low gas-to-dust ratio?”, Astronomy and Astrophysics 520: A61, doi:10.1051/0004-6361/201014841, A61, Bibcode2010A&A...520A..61C. 
  • Chapillon, E.; Guilloteau, S.; Dutrey, A.; Piétu, V. (November 2008), Charbonnel, C.; Combes, F.; Samadi, R., red., ”Disks around CQ Tau and MWC 758: Dense PDRs or gas dispersal?”, SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics: s. 303, Bibcode2008sf2a.conf..303C. 
  • Kozlova, O. V.; Shakhovskoi, D. N.; Rostopchina, A. N.; Alekseev, I. Yu. (January 2007), ”Structure of the inner region of the accretion disk of the Herbig Ae star CQ Tau based on long-term monitoring data”, Astrophysics 50 (1): 26–39, doi:10.1007/s10511-007-0004-z, Bibcode2007Ap.....50...26K. 
  • Doucet, C.; Pantin, E.; Lagage, P. O.; Dullemond, C. P. (December 2006), ”Mid-infrared imaging of the circumstellar dust around three Herbig Ae stars: HD 135344, CQ Tau, and HD 163296”, Astronomy and Astrophysics 460 (1): 117–124, doi:10.1051/0004-6361:20054371, Bibcode2006A&A...460..117D. 
  • Shakhovskoj, D. N.; Grinin, V. P.; Rostopchina, A. N. (April 2005), ”Analysis of the Historical Light Curve of the UX Ori Star CQ Tau”, Astrophysics 48 (2): 135–142, doi:10.1007/s10511-005-0014-7, Bibcode2005Ap.....48..135S. 
  • Shakhovskoy, D. N.; Grinin, V. P.; Rostopchina, A. N. (2005), ”Variations of Effective Size of Dust Grains in CQ Tau”, Protostars and Planets V, Proceedings of the Conference held October 24–28, 2005, in Hilton Waikoloa Village, Hawai'i. LPI Contribution No. 1286 (1286): s. 8119, Bibcode2005prpl.conf.8119S. 
  • Minikulov, N. Kh.; Rakhimov, V. Yu.; Volchkova, N. A.; Pikhun, A. I. (1993), ”Investigation of light curves of young irregular variables. 1. SV CEP and CQ Tau”, Astrofizika 36: 55–60, Bibcode1993Afz....36...55M. 
  • Polosukhina, N. S.; Lebedeva, L. (December 1966), ”Polarization and Brightness Variations of the Magnetic Variable HD 215441”, Soviet Astronomy 10: 407, Bibcode1966SvA....10..407P. 

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