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DD Canum Venaticorum

Ficha d'oxetu celesteDD Canum Venaticorum
Estrella variable[1], Estrella variable Gamma Doradus (es) Traducir[1], near-IR source (en) Traducir[1] y UV-emission source (en) Traducir[1]
Datos d'observación
Ascensión reuta (α) 186,23722811498 °[2]
Declinación (δ) 42,85476030498 °[2]
Distancia a la Tierra 84,174 pc
86,1794 pc
Magnitú aparente (V) 7,14 (banda V)
Constelación Canes Venatici
Velocidá radial −8,4 km/s[4]
Parallax 11,8802 mas[2]
Tipu espectral F2V[1]
Otros nomes
Cambiar los datos en Wikidata

Coordenaes: Sky map 12h 24m 56.935s, 42° 51 17.137

DD Canum Venaticorum (DD CVn / HD 108100 / HIP 60571)[5] ye una estrella variable na constelación de Canes Venatici de magnitú aparente media +7,14. Alcuéntrase a 270 años lluz de distancia del Sistema Solar.

DD Canum Venaticorum ye una estrella de la secuencia principal de tipu F2V.[5] Tien una temperatura efectivo de 6850 K[6] y relluma con una lluminosidá 6,5 vegaes mayor que la lluminosidá solar. El so radiu ye un 70% más grande que'l radiu solar.[7] Amuesa una bayura relativa de fierro, midida indireuta de la metalicidá, inferior a la solar nun 27%. La so masa averada ye un 40% mayor que la del Sol y la so edá envalórase en 1600 millones d'años.[8] Anque esiste ciertu discutiniu tocantes a la duplicidá de DD Canum Venaticorum, polo xeneral considerar una binaria espectroscópica,[7] onde les respeutives velocidaes de rotación proyeutaes son 13 y 65 km/s.[9]

DD Canum Venaticorum ye una variable Gamma Doradus, asemeyada a γ Doradus —prototipu del grupu— o a QW Puppis, con un periodu de 0,7541 díes.[7] Piénsase que nestes estrelles la variabilidá provién de pulsaciones non radiales de la so superficie.

Referencies

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  1. 1,0 1,1 1,2 1,3 1,4 1,5 Afirmao en: SIMBAD.
  2. 2,0 2,1 2,2 2,3 Afirmao en: Gaia EDR3. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 3 avientu 2020.
  3. Afirmao en: Gaia DR3. Llingua de la obra o nome: inglés. Data d'espublización: 13 xunu 2022.
  4. «Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system» (n'inglés). Astronomy Letters (11):  páxs. 759–771. payares 2006. doi:10.1134/S1063773706110065. 
  5. 5,0 5,1 V* DD CVn -- Variable Star of gamma Dor type (SIMBAD)
  6. Gerbaldi, M.; Faraggiana, R.; Caffau, E. (2007). «UV flux distributions of γ Doradus stars». Astronomy and Astrophysics 472 (1). pp. 241-246. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007A%26A...472..241G&db_key=AST&nosetcookie=1. 
  7. 7,0 7,1 7,2 Henry, Gregory W.; Fekel, Francis C.; Henry, Stephen M. (2007). «Photometry and Spectroscopy of 11 γ Doradus Stars». The Astronomical Journal 133 (4). pp. 1421-1440. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007AJ....133.1421H&db_key=AST&nosetcookie=1. 
  8. Holmberg, J.; Nordström, B.; Andersen, J. (2009). «The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics». Astronomy and Astrophysics 501 (3). pp. 941-947 (Tabla consultada en CDS). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009A%26A...501..941H&db_key=AST&nosetcookie=1. 
  9. Mathias, P.; -y Contel, J.-M.; Chapellier, Y.; Jankov, S.; Sareyan, J.-P.; Poretti, Y.; Garrido, R.; Rodríguez, Y.; Arellano Ferro, A.; Alvarez, M.; Parrao, L.; Peña, J.; Eyer, L.; Aerts, C.; De Cat, P.; Weiss, W. W.; Zhou, A. (2004). «Multi-site, multi-technique survey of γ Doradus candidates. I. Spectroscopic results for 59 stars». Astronomy and Astrophysics 417. pp. 189-199. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2004A%26A...417..189M&db_key=AST&nosetcookie=1. 

Coordenaes: Sky map 12h 24m 56.935s, 42° 51 17.137

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DD Canum Venaticorum
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