Fi2 Ceti

Fi2 Ceti
	fonte d'infrarroxos, astrophysical X-ray source (en) , estrella con movimientu propiu altu, near-infrared source (en) y ultraviolet source (en)
Datos d'observación
Ascensión reuta (α)	12,531620676963 °
Declinación (δ)	−10,644328847899 °
Distancia a la Tierra	15,923 pc
Magnitú aparente (V)	5,19 (banda V)
Magnitú absoluta	4,23
Constelación	Cetus
Velocidá de rotación	5,4 km/s
Velocidá radial	8,155 km/s
Parallax	62,8022 mas
Carauterístiques físiques
Radiu	1,15 Radius solars
Masa	1,19 M☉
Gravedá superficial	22 540 cm/s²
Tipu espectral	F7V
Otros nomes
	Ver llista HIP 3909 (Catálogu Hipparcos); HR 235 (Bright Star Catalogue); IRAS 00476-1054 (IRAS (en) ); 2MASS J00500759-1038394 (2MASS (en) ); HD 4813 (Catálogu Henry Draper); SAO 147470 (Catálogu SAO); GJ 37 (Catálogu Gliese); PLX 166 (General Catalogue of Trigonometric Stellar Parallaxes (en) ); FK5 30 (FK5); GC 1003 (Boss General Catalogue (en) ); GCRV 470 (General Catalogue of Stellar Radial Velocities); HIC 3909 (Hipparcos Input Catalogue (en) ); JP11 425 (JP11 (en) ); LTT 476 (Luyten Two-Tenths catalogue (en) ); N30 173 (Catalog of 5,268 Standard Stars Based on the Normal System N30 (en) ); NLTT 2785 (New Luyten Two-Tenths catalogue (en) ); NSV 316 (New Catalogue of Suspected Variable Stars (en) ); PMC 90-93 22 (Tokyo Photoelectric Meridian Circle Catalog (en) ); PPM 209360 (PPM Star Catalogue (en) ); ROT 144 (Catalogue of rotational velocities of the stars (en) ); SACS 15 (Second astrolabe catalogue of Santiago (en) ); TD1 465 (TD1 Catalog of Stellar Ultraviolet Fluxes (en) ); UBV 684 (UBV Photoelectric Photometry Catalogue (en) ); uvby98 100004813 (uvbyβ Photoelectric Photometric Catalogue (en) ); PLX 166.00 (General Catalogue of Trigonometric Stellar Parallaxes (en) ); 1RXS J005007.1-103836 (1RXS); 19 Cet (Flamsteed designation (en) ); YZC 11 158 (Catalogue of the positions and proper motions of "nnn" stars. Zone between declination +20 and + 25 (en) ); WEB 696 (Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue); Gaia DR2 2473608009504466688 (Gaia DR2); φ² Cet (Denominación de Bayer); Gaia DR3 2473608009504466688 (Gaia DR3); TIC 3962869 (TESS Input Catalog (en) ); TYC 5270-1139-1 (Tycho Catalogue (en) ); UBV M 7691 (UBV Photoelectric Photometry Catalogue (en) );

Fi2 Ceti (φ² Cet / 19 Ceti / HD 4813 / HR 235)^[7] ye una estrella na constelación de Cetus, el bisarma marina, de magnitú aparente +5,19. Comparte la denominación de Bayer «Fi» con otros trés estrelles, que nun tán físicamente rellacionaes ente sigo. Ye la más próxima a nós de los cuatro, yá que s'atopa a 50 años lluz del Sistema Solar.

Fi2 Ceti ye una estrella blancu-mariella de la secuencia principal —catalogada tamién como posible subxigante— de tipu espectral F7IV-V.^[7] Tien una temperatura efectivo ente 6139 K^[8] y 6271 K, siendo la so lluminosidá un 74% mayor que la lluminosidá solar.^[9] Xira sobre sigo mesma con una velocidá de rotación igual o mayor de 4,3 km/s.^[8] La so metalicidá —bayura relativa d'elementos más pesaos que'l heliu— ye inferior a la solar ([Fe/H] = -0,15). El conteníu d'otros elementos como sodiu, magnesiu, aluminiu, siliciu o calciu sigue'l mesmu enclín.^[10]

La masa de Fi2 Ceti ye un 14% mayor que la masa solar.^[9] Ye una estrella más nueva que'l Sol, que la so edá ye de 4600 millones d'años; diversos estudios asitien la edá de Fi2 Ceti ente los 1000^[11] y los 1445 millones d'años.^[9] Per otra parte, podría ser una binaria espectroscópica^[12] según una estrella variable;^[13] nengún d'estos aspeutos foi confirmáu.

Referencies

1 2 3 4 5 Afirmao en: SIMBAD. Llingua de la obra o nome: inglés.
1 2 3 «Gaia EDR3» (n'inglés). VizieR Online Data Catalog. 3 avientu 2020. doi:10.26093/CDS/VIZIER.1350.
↑ «Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants». The Astronomical Journal (1). 21 avientu 2016. doi:10.3847/1538-3881/153/1/21.
↑ Caroline Soubiran (agostu 2018). «Gaia Data Release 2. The catalogue of radial velocity standard stars» (n'inglés). Astronomy and Astrophysics. doi:10.1051/0004-6361/201832795.
↑ «Detailed chemical compositions of planet-hosting stars - I. Exploration of possible planet signatures». Monthly Notices of the Royal Astronomical Society (4): páxs. 3961-3973. mayu 2020. doi:10.1093/MNRAS/STAA1420.
↑ Afirmao en: Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 1999.
1 2 19 Cet -- Variable Star (SIMBAD)
1 2 Schröder, C.; Reiners, A.; Schmitt, J. H. M. M. (2009). «Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo». Astronomy and Astrophysics 493 (3). páxs. 1099-1107. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009A&A...493.1099S&db_key=AST&nosetcookie=1.
1 2 3 Takeda, Yoichi (2007). «Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database». Publications of the Astronomical Society of Japan 59 (2). páxs. 335-356 (Tabla consultada en CDS). http://cdsarc.u-strasbg.fr/cgi-bin/VizieR-5?-out.add=.&-source=J/PASJ/59/335/catalog&recno=84.
↑ Soubiran, C.; Girard, P. (2005). «Abundance trends in kinematical groups of the Milky Way's disk». Astronomy and Astrophysics 438 (1). páxs. 139-151. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2005A%26A...438..139S&db_key=AST&nosetcookie=1.
↑ 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). páxs. 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.
↑ Raghavan, Deepak; McAlister, Harold A.; Henry, Todd J.; Latham, David W.; Marcy, Geoffrey W.; Mason, Brian D.; Gies, Douglas R.; White, Russel J.; ten Brummelaar, Theo A. (2009). «A Survey of Stellar Families: Multiplicity of Solar-type Stars». The Astrophysical Journal Supplement 190 (1). páxs. 1-42. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010ApJS..190....1R&db_key=AST&nosetcookie=1.
↑ Phi2 Ceti (General Catalogue of Variable Stars)

[8ba559d5760a03bedaaacc3c347bbfe4981560bf-1] 1 2 3 4 5 Afirmao en: SIMBAD. Llingua de la obra o nome: inglés.

[88f46fab9cce60c7e274ff942763157775017282-2] 1 2 3 «Gaia EDR3» (n'inglés). VizieR Online Data Catalog. 3 avientu 2020. doi:10.26093/CDS/VIZIER.1350.

[bd2a71104e373ac322e3d44720f2532f6e28db17-3] «Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants». The Astronomical Journal (1). 21 avientu 2016. doi:10.3847/1538-3881/153/1/21.

[3bf3b74f599a0eb91eecfea10ab3e78fe4e80b5e-4] Caroline Soubiran (agostu 2018). «Gaia Data Release 2. The catalogue of radial velocity standard stars» (n'inglés). Astronomy and Astrophysics. doi:10.1051/0004-6361/201832795.

[628e99faf29d3f31baf4e36e08b9d9842ecf63d9-5] «Detailed chemical compositions of planet-hosting stars - I. Exploration of possible planet signatures». Monthly Notices of the Royal Astronomical Society (4): páxs. 3961-3973. mayu 2020. doi:10.1093/MNRAS/STAA1420.

[acc23fb409b63555b0928654732a17f812d97617-6] Afirmao en: Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5. Stated in source according to: SIMBAD. Llingua de la obra o nome: inglés. Data d'espublización: 1999.

[SIMBAD-7] 1 2 19 Cet -- Variable Star (SIMBAD)

[Schroder-8] 1 2 Schröder, C.; Reiners, A.; Schmitt, J. H. M. M. (2009). «Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo». Astronomy and Astrophysics 493 (3). páxs. 1099-1107. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009A&A...493.1099S&db_key=AST&nosetcookie=1.

[Takeda-9] 1 2 3 Takeda, Yoichi (2007). «Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database». Publications of the Astronomical Society of Japan 59 (2). páxs. 335-356 (Tabla consultada en CDS). http://cdsarc.u-strasbg.fr/cgi-bin/VizieR-5?-out.add=.&-source=J/PASJ/59/335/catalog&recno=84.

[Soubiran2005-10] Soubiran, C.; Girard, P. (2005). «Abundance trends in kinematical groups of the Milky Way's disk». Astronomy and Astrophysics 438 (1). páxs. 139-151. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2005A%26A...438..139S&db_key=AST&nosetcookie=1.

[Geneva2009-11] 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). páxs. 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.

[Raghavan-12] Raghavan, Deepak; McAlister, Harold A.; Henry, Todd J.; Latham, David W.; Marcy, Geoffrey W.; Mason, Brian D.; Gies, Douglas R.; White, Russel J.; ten Brummelaar, Theo A. (2009). «A Survey of Stellar Families: Multiplicity of Solar-type Stars». The Astrophysical Journal Supplement 190 (1). páxs. 1-42. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010ApJS..190....1R&db_key=AST&nosetcookie=1.

[13] Phi2 Ceti (General Catalogue of Variable Stars)

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