Gliese 436

Gliese 436
Data pengamatan; Epos J2000 Ekuinoks J2000
Rasi bintang	Leo
Asensio rekta	11j 42m 11.09368d
Deklinasi	+26° 42′ 23.6537″
Magnitudo tampak (V)	10.67
Ciri-ciri
Kelas spektrum	M2.5 V
Magnitudo semu (B)	~12.20
Magnitudo semu (V)	~10.68
Magnitudo semu (J)	6.900 ± 0.024
Magnitudo semu (H)	6.319 ± 0.023
Magnitudo semu (K)	6.073 ± 0.016
Indeks warna U−B	+1.23
Indeks warna B−V	+1.52
Astrometri
Kecepatan radial (Rv)	+10.0 km/s
Gerak diri (μ)	RA: +896.07 mdb/thn ; Dek.: –813.54 mdb/thn
Paralaks (π)	98,61±2,33 mdb
Jarak	33,1 ± 0,8 tc ; (10,1 ± 0,2 pc)
Magnitudo mutlak (MV)	10.63
Detail
Massa	0.41 ± 0.05 M☉
Radius	0.42 R☉
Luminositas	0.025 L☉
Gravitasi permukaan (log g)	5.0
Suhu	3,318 K
Metalisitas [Fe/H]	–0.32 ± 0.12
Kecepatan rotasi (v sin i)	1.0 km/s
Usia	6.5–9.9 gigatahun
Penamaan lain
	2MASS J11421096+2642251, GJ 436, HIP 57087, LTT 13213, LHS 310, Ross 905.
Referensi basis data
SIMBAD	data
Extrasolar Planets; Encyclopaedia	data

Gliese 436 adalah sebuah bintang katai merah yang berjarak sekitar 331 tahun cahaya (101 parsec) jauhnya di rasi bintang zodiak Leo.

Pada 2004, keberadaan sebuah eksoplanet transit, Gliese 436b, diverifikasikan sebagai planet yang mengorbit bintang tersebut. Pada 2012, keberadaan planet kedua, UCF-1.01,^[12] juga diverifikasikan.

Properti[sunting | sunting sumber]

Gliese 436 adalah sebuah bintang M2.5V,^[2] yang artinya bahwa bintang tersebut merupakan bintang katai merah. Model Stellar memberikan ukuran perkiraan sekitar 42% dari radius matahari. Model yang sama juga memprediksi bahwa atmosfer luar memiliki temperatur efektif 3,318 K^[7]

Gliese 436 lebih tua dari Matahari beberapa miliar tahun.

Referensi[sunting | sunting sumber]

^ ^a ^b ^c ^d ^e van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
^ ^a ^b ^c ^d ^e ^f ^g Butler, R. Paul; et al. (2004). "A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436". The Astrophysical Journal. 617 (1): 580–588. arXiv:astro-ph/0408587 . Bibcode:2004ApJ...617..580B. doi:10.1086/425173. Diakses tanggal 2009-12-26.
^ ^a ^b Reid, I. Neill; et al. (July 2004), "Meeting the Cool Neighbors. VIII. A Preliminary 20 Parsec Census from the NLTT Catalogue", The Astronomical Journal, 128 (1): 463–483, arXiv:astro-ph/0404061 , Bibcode:2004AJ....128..463R, doi:10.1086/421374
^ ^a ^b ^c Cutri, R. M.; et al. (June 2003), 2MASS All Sky Catalog of point sources, NASA/IPAC, Bibcode:2003tmc..book.....C
^ ^a ^b "Query Result:LHS 310 -- High proper-motion Star". SIMBAD Astronomical Object Database. Centre de Données astronomiques de Strasbourg. Diarsipkan dari versi asli tanggal 2016-03-04. Diakses tanggal 2007-11-28.
^ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495.....
^ ^a ^b ^c Johnson, H. M.; Wright, C. D. (1983). "Predicted infrared brightness of stars within 25 parsecs of the sun". Astrophysical Journal Supplement Series. 53: 643–711. Bibcode:1983ApJS...53..643J. doi:10.1086/190905. —see page 673.
^ Maness, H. L.; et al. (January 2007), "The M Dwarf GJ 436 and its Neptune-Mass Planet", The Publications of the Astronomical Society of the Pacific, 119 (851): 90–101, arXiv:astro-ph/0608260 , Bibcode:2007PASP..119...90M, doi:10.1086/510689
^ Bean, Jacob L.; Benedict, G. Fritz; Endl, Michael (2006). "Metallicities of M Dwarf Planet Hosts from Spectral Synthesis". The Astrophysical Journal (abstract). 653 (1): L65–L68. arXiv:astro-ph/0611060 . Bibcode:2006ApJ...653L..65B. doi:10.1086/510527. —for the metallicity, note that ${\begin{smallmatrix}10^{-0.32}=0.48\end{smallmatrix}}$ or 48%
^ Jenkins, J. S.; et al. (October 2009), "Rotational Velocities for M Dwarfs", The Astrophysical Journal, 704 (2): 975–988, arXiv:0908.4092 , Bibcode:2009ApJ...704..975J, doi:10.1088/0004-637X/704/2/975
^ Saffe, C.; Gómez, M.; Chavero, C. (2006). "On the Ages of Exoplanet Host Stars". Astronomy & Astrophysics. 443 (2): 609–626. arXiv:astro-ph/0510092 . Bibcode:2005A&A...443..609S. doi:10.1051/0004-6361:20053452.
^ New Planet Found: Molten "Mars" Is "Right Around the Corner" Diarsipkan 2015-06-11 di Wayback Machine., Dave Mosher, National Geographic News, 19 Juli 2012

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Pranala luar[sunting | sunting sumber]

"Gliese 436 / AC+27 28217". Sol Company. Diarsipkan dari versi asli tanggal 2015-09-13. Diakses tanggal 2007-11-28.
"GJ 436". l’Observatoire de Paris. Diarsipkan dari versi asli tanggal 2012-04-01. Diakses tanggal 2009-05-20.
"New Planet Found: Molten "Mars" Is "Right Around the Corner"". National Geographic. Diarsipkan dari versi asli tanggal 2015-06-11. Diakses tanggal 2012-07-20.

Koordinat: 11^h 42^m 11.0941^s, +26° 42′ 23.652″ Templat:Sistem bintang berjarak 30 – 35 tahun cahaya

[aaa474_2_653-1] van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.

[apj617-2] ^ ^a ^b ^c ^d ^e ^f ^g Butler, R. Paul; et al. (2004). "A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436". The Astrophysical Journal. 617 (1): 580–588. arXiv:astro-ph/0408587 . Bibcode:2004ApJ...617..580B. doi:10.1086/425173. Diakses tanggal 2009-12-26.

[aj128_1_463-3] Reid, I. Neill; et al. (July 2004), "Meeting the Cool Neighbors. VIII. A Preliminary 20 Parsec Census from the NLTT Catalogue", The Astronomical Journal, 128 (1): 463–483, arXiv:astro-ph/0404061 , Bibcode:2004AJ....128..463R, doi:10.1086/421374

[2MASS-4] Cutri, R. M.; et al. (June 2003), 2MASS All Sky Catalog of point sources, NASA/IPAC, Bibcode:2003tmc..book.....C

[SIMBAD-5] "Query Result:LHS 310 -- High proper-motion Star". SIMBAD Astronomical Object Database. Centre de Données astronomiques de Strasbourg. Diarsipkan dari versi asli tanggal 2016-03-04. Diakses tanggal 2007-11-28.

[gcsrv-6] Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953QB901.W495.....

[apjss52-7] Johnson, H. M.; Wright, C. D. (1983). "Predicted infrared brightness of stars within 25 parsecs of the sun". Astrophysical Journal Supplement Series. 53: 643–711. Bibcode:1983ApJS...53..643J. doi:10.1086/190905. —see page 673.

[pasp119_851_90-8] Maness, H. L.; et al. (January 2007), "The M Dwarf GJ 436 and its Neptune-Mass Planet", The Publications of the Astronomical Society of the Pacific, 119 (851): 90–101, arXiv:astro-ph/0608260 , Bibcode:2007PASP..119...90M, doi:10.1086/510689

[apj653-9] Bean, Jacob L.; Benedict, G. Fritz; Endl, Michael (2006). "Metallicities of M Dwarf Planet Hosts from Spectral Synthesis". The Astrophysical Journal (abstract). 653 (1): L65–L68. arXiv:astro-ph/0611060 . Bibcode:2006ApJ...653L..65B. doi:10.1086/510527. —for the metallicity, note that ${\begin{smallmatrix}10^{-0.32}=0.48\end{smallmatrix}}$ or 48%

[apj704_2_975-10] Jenkins, J. S.; et al. (October 2009), "Rotational Velocities for M Dwarfs", The Astrophysical Journal, 704 (2): 975–988, arXiv:0908.4092 , Bibcode:2009ApJ...704..975J, doi:10.1088/0004-637X/704/2/975

[saffe-11] Saffe, C.; Gómez, M.; Chavero, C. (2006). "On the Ages of Exoplanet Host Stars". Astronomy & Astrophysics. 443 (2): 609–626. arXiv:astro-ph/0510092 . Bibcode:2005A&A...443..609S. doi:10.1051/0004-6361:20053452.

[12] New Planet Found: Molten "Mars" Is "Right Around the Corner" Diarsipkan 2015-06-11 di Wayback Machine., Dave Mosher, National Geographic News, 19 Juli 2012

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Data pengamatan Epos J2000 Ekuinoks J2000
Rasi bintang	Leo
Asensio rekta	11^j 42^m 11.09368^d^[1]
Deklinasi	+26° 42′ 23.6537″^[1]
Magnitudo tampak (V)	10.67^[2]
Ciri-ciri
Kelas spektrum	M2.5 V^[2]
Magnitudo semu (B)	~12.20^[3]
Magnitudo semu (V)	~10.68^[3]
Magnitudo semu (J)	6.900 ± 0.024^[4]
Magnitudo semu (H)	6.319 ± 0.023^[4]
Magnitudo semu (K)	6.073 ± 0.016^[4]
Indeks warna U−B	+1.23^[5]
Indeks warna B−V	+1.52^[2]
Astrometri

Kecepatan radial (R_v)	+10.0^[6] km/s
Gerak diri (μ)	RA: +896.07^[1] mdb/thn Dek.: –813.54^[1] mdb/thn
Paralaks (π)	98,61±2,33^[1] mdb
Jarak	33,1 ± 0,8 tc (10,1 ± 0,2 pc)
Magnitudo mutlak (M_V)	10.63^[2]

Detail

Massa	0.41 ± 0.05^[2] M_☉
Radius	0.42^[7] R_☉
Luminositas	0.025^[2] L_☉
Gravitasi permukaan (log g)	5.0^[8]
Suhu	3,318^[7] K
Metalisitas [Fe/H]	–0.32 ± 0.12^[9]
Kecepatan rotasi (v sin i)	1.0^[10] km/s
Usia	6.5–9.9^[11] gigatahun

Penamaan lain
2MASS J11421096+2642251, GJ 436, HIP 57087, LTT 13213, LHS 310, Ross 905.^[5]
Referensi basis data
SIMBAD	data
Extrasolar Planets Encyclopaedia	data