HD 126053

HD 126053
Datos d'observación; (Dómina J2000.0)
Constelación	Virgu
Ascensión reuta (α)	14h 23min 15,28s
Declinación (δ)	+01º 14’ 29,6’’
Mag. aparente (V)	+6,30
Carauterístiques físiques
Clasificación estelar	G1.5V
Masa solar	0,84 M☉
Radiu	(0,98 R☉)
Magnitú absoluta	+5,07
Gravedá superficial	4,40 (log g)
Lluminosidá	0,90 L☉
Temperatura superficial	5693 ± 3 K
Metalicidá	[Fe/H] = -0,34
Astrometría
Velocidá radial	-18,5 km/s
Distancia	56,1 ± 0,5 años lluz (17,2 pc)
Paralax	58,17 ± 0,53 mas
Referencies
SIMBAD	enllaz
Otres designaciones
	HR 5384 / HIP 70319 / Gliese 547 / SAO 120424 / BD+01 2920 / G65-47
	[editar datos en Wikidata]

HD 126053^[1] ye una estrella na constelación de Virgu de magnitú aparente +6,30. Alcuéntrase a 56 años lluz del Sistema Solar.

Carauterístiques físiques

HD 126053 ye una nana mariella de tipu espectral G1.5V con una temperatura superficial de 5693 ± 3 K.^[2] Tien una lluminosidá un 10% inferior a la del Sol^[3] y una masa de 0,84 mases solares.^[4] Con un radiu un 2% más pequeñu que'l del radiu solar,^[5] xira sobre sigo mesma con una velocidá de rotación proyeutada de 1,6 km/s.^[6]

Anque ye una estrella más antigua que'l Sol, nun esiste consensu tocantes a la so edá; un estudiu apunta una edá de 5.700 millones d'años —con un máximu de 10.600 millones d'años—,^[7] ente qu'otru establez una edá significativamente mayor de 11.700 millones d'años. Nesti postreru supuestu, HD 126053 sería una de los análogos solares más antiguos conocíos.^[6] Como cabría esperar nuna estrella tan vieya, HD 126053 nun amuesa signos d'actividá cromosférica.^[8]

Composición química

HD 126053 evidencia un conteníu metálico considerablemente inferior al del Sol, siendo'l so índiz de metalicidá [Fe/H] = -0,34.^[2] Los niveles de tolos elementos evaluaos son menores que les solares. Nel casu de siliciu y vanadiu, los sos conteníos correspuenden al 62% de los valores solares, ente que los conteníos de níquel y bariu nun algamar el 40% de los determinaos nel Sol ([Ba/Fe] = -0,10).^[4]^[9]

El so conteníu de litiu —elementu que ye destruyíu nel interior de les estrelles a temperatures relativamente baxes de 2,4 millones de K— ye bien asemeyáu a la solar (A(Li) = 1,09).^[6]

Referencies

↑ LHS 2907 -- High proper-motion Star (SIMBAD)
↑ ^2,0 ^2,1 Casagrande, L.; Ramírez, I.; Meléndez, J.; Bessell, M.; Asplund, M. (2010). «An absolutely calibrated Teff scale from the infrared flux method. Dwarfs and subgiants». Astronomy and Astrophysics 512. A54. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010A%26A...512A..54C&db_key=AST&nosetcookie=1.
↑ Gliese 547. Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)
↑ ^4,0 ^4,1 Takeda, Y.; Honda, S.; Kawanomoto, S.; Ando, H.; Sakurai, T. (2007). «Behavior of Li abundances in solar-analog stars. Evidence for line-width dependence». Astronomy and Astrophysics 468 (2). pp. 663-677. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007A%26A...468..663T&db_key=AST&nosetcookie=1.
↑ Takeda, Genya; Ford, Eric B.; Sills, Alison; Rasio, Frederic A.; Fischer, Debra A.; Valenti, Jeff A. (2007). «Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog». The Astrophysical Journal Supplement Series 168 (2). pp. 297-318. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007ApJS..168..297T&db_key=AST&nosetcookie=1.
↑ ^6,0 ^6,1 ^6,2 Takeda, Y.; Honda, S.; Kawanomoto, S.; Ando, H.; Sakurai, T. (2010). «Behavior of Li abundances in solar-analog stars. II. Evidence of the connection with rotation and stellar activity». Astronomy and Astrophysics 515. pp. A93. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010A%26A...515A..93T&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). pp. 941-947. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009A%26A...501..941H&db_key=AST&nosetcookie=1.
↑ Martínez-Arnáiz, R.; Maldonado, J.; Montes, D.; Eiroa, C.; Montesinos, B. (2010). «Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter». Astronomy and Astrophysics 520. A79. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010A%26A...520A..79M&db_key=AST&nosetcookie=1.
↑ Mashonkina, L. I.; Vinogradova, A. B.; Ptitsyn, D. A.; Khokhlova, V. S.; Chernetsova, T. A. (2007). «Neutron-prinde elements in halo, thick-disk, and thin-disk stars. Strontium, yttrium, zirconium, cerium». Astronomy Reports 51 (11). pp. 903-919. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007ARep...51..903M&db_key=AST&nosetcookie=1.

Coordenaes: 14^h 23^m 15.285^s, 1^° 14^′ 29.641^″

[1] LHS 2907 -- High proper-motion Star (SIMBAD)

[CG-2] 2,0 ^2,1 Casagrande, L.; Ramírez, I.; Meléndez, J.; Bessell, M.; Asplund, M. (2010). «An absolutely calibrated Teff scale from the infrared flux method. Dwarfs and subgiants». Astronomy and Astrophysics 512. A54. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010A%26A...512A..54C&db_key=AST&nosetcookie=1.

[XHIP-3] Gliese 547. Extended Hipparcos Compilation (XHIP) (Anderson+, 2012)

[TakedaI-4] 4,0 ^4,1 Takeda, Y.; Honda, S.; Kawanomoto, S.; Ando, H.; Sakurai, T. (2007). «Behavior of Li abundances in solar-analog stars. Evidence for line-width dependence». Astronomy and Astrophysics 468 (2). pp. 663-677. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007A%26A...468..663T&db_key=AST&nosetcookie=1.

[TakedaSPOCS-5] Takeda, Genya; Ford, Eric B.; Sills, Alison; Rasio, Frederic A.; Fischer, Debra A.; Valenti, Jeff A. (2007). «Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog». The Astrophysical Journal Supplement Series 168 (2). pp. 297-318. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007ApJS..168..297T&db_key=AST&nosetcookie=1.

[TakedaII-6] 6,0 ^6,1 ^6,2 Takeda, Y.; Honda, S.; Kawanomoto, S.; Ando, H.; Sakurai, T. (2010). «Behavior of Li abundances in solar-analog stars. II. Evidence of the connection with rotation and stellar activity». Astronomy and Astrophysics 515. pp. A93. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010A%26A...515A..93T&db_key=AST&nosetcookie=1.

[Geneva2009-7] 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. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009A%26A...501..941H&db_key=AST&nosetcookie=1.

[Martinez-8] Martínez-Arnáiz, R.; Maldonado, J.; Montes, D.; Eiroa, C.; Montesinos, B. (2010). «Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter». Astronomy and Astrophysics 520. A79. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010A%26A...520A..79M&db_key=AST&nosetcookie=1.

[9] Mashonkina, L. I.; Vinogradova, A. B.; Ptitsyn, D. A.; Khokhlova, V. S.; Chernetsova, T. A. (2007). «Neutron-prinde elements in halo, thick-disk, and thin-disk stars. Strontium, yttrium, zirconium, cerium». Astronomy Reports 51 (11). pp. 903-919. https://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2007ARep...51..903M&db_key=AST&nosetcookie=1.

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