2MASS J21392676+0220226

	2MASS J21392676+0220226
Observationsdata; Epok: J2000.0
Stjärnbild	Vattumannen
Rektascension	21t 39m 26,769s
Deklination	+02° 20′ 22,70″
Skenbar magnitud ()	+14,710 (J)
Stjärntyp
Spektraltyp	T1.5
Astrometri
Radialhastighet ()	-25,1 ± 0,3 km/s
Egenrörelse (µ)	RA: +489,7 ± 0,7 mas/år; Dek.: +125,0 ± 0,8 mas/år
Parallax ()	96,5 ± 1,1
Avstånd	33,8 ± 0,4 lå (10,4 ± 0,1 pc)
Detaljer
Massa	14,6 +3,2−1,6 MJup M☉
Radie	1,17 +0,02−0,04 RJup R☉
Temperatur	1 111 +37−42 K
Ålder	200 ± 50 miljoner år
Andra beteckningar
	CFBDS J213926+022023, 2MUCD 20912, WISEP J213927.09+022023.7, 2MASS J21392676+0220226, WISEA J213927.09+022023.9, WISE J213927.09+022024.1

2MASS J21392676+0220226 eller CFBDS J213926+02202, är en ensam stjärna belägen i den norra delen av stjärnbilden Vattumannen.^[5] Den har en skenbar magnitud av ca 14,7^[2] (J) och kräver ett kraftfullt teleskop för att kunna observeras. Baserat på uppmätt parallax på ca 96,5^[3] mas beräknas den befinna sig på ett avstånd av ca 34 ljusår (ca 10 parsec)från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -25 km/s.^[3] Stjärnan ingår i Carina-Near-rörelsegruppen.^[3]

Egenskaper

2MASS J21392676+0220226 är en brun dvärgstjärna av spektralklass T1.5^[3] vars yta tros vara värd för en massiv storm,^[6] vilken resulterar i stor variation i färgen.^[7] Den har en massa av ca 15^[3] jupitermassor, en radie av ca 1,2^[3] jupiterradie och har en effektiv temperatur av ca 1 100^[3] K.

Molnen på den bruna dvärgen är modellerade som fläckiga forsteritmoln på hög höjd ovanför ett djupare, optiskt tjockt järnmoln. Silikatmolnen täcker 75-91 procent av ytan på den bruna dvärgen.^[8] En alternativ modell från omkring 2016 kan förklara variationen och atmosfären hos denna bruna dvärg utan moln.^[9]

Stjärnan troddes, baserat på en studie från 2010,^[10]^[11] vara en dubbelstjärna, men har sedan dess visat sig vara singel.^[12]^[13]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, 2MASS J21392676+0220226, 13 juli 2024.

Noter

^ [a b] Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
^ [a b] "2MASS J21392676+0220226". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 19 december 2016.
^ [a b c d e f g h i j k l m n o p] Zhang, Zhoujian; Liu, Michael C.; et al. (April 2021). "The Hawaii Infrared Parallax Program. V. New T-dwarf Members and Candidate Members of Nearby Young Moving Groups". The Astrophysical Journal. 911 (1): 7. arXiv:2102.05045. Bibcode:2021ApJ...911....7Z. doi:10.3847/1538-4357/abe3fa. S2CID 231861787.
^ https://simbad.cds.unistra.fr/simbad/sim-id?Ident=2MUCD+20912. Hämtad 2025-03-09.
^ Andrew Fazekas. "Colossal Storm May Rage on Jupiter-like 'Failed Star'".
^ Dean Praetorius. "Brown Dwarf May Be Host To Massive, Violent Mega Storm". The Huffington Post, 9/13/2011.
^ Lew, Ben W. P.; Apai, Dániel; Zhou, Yifan; Radigan, Jacqueline; Marley, Mark; Schneider, Glenn; Cowan, Nicolas B.; Miles-Páez, Paulo A.; Manjavacas, Elena; Karalidi, Theodora; Bedin, L. R.; Lowrance, Patrick J.; Burgasser, Adam J. (2020), "Cloud Atlas: Weak Color Modulations Due to Rotation in the Planetary-mass Companion GU PSC b and 11 Other Brown Dwarfs", The Astronomical Journal, 159 (3): 125, arXiv:1912.02812, Bibcode:2020AJ....159..125L, doi:10.3847/1538-3881/ab5f59, S2CID 208637110
^ Vos, Johanna M.; Burningham, Ben; Faherty, Jacqueline K.; Alejandro, Sherelyn; Gonzales, Eileen; Calamari, Emily; Bardalez Gagliuffi, Daniella; Visscher, Channon; Tan, Xianyu; Morley, Caroline V.; Marley, Mark; Gemma, Marina E.; Whiteford, Niall; Gaarn, Josefine; Park, Grace (2023-02-01). "Patchy Forsterite Clouds in the Atmospheres of Two Highly Variable Exoplanet Analogs". The Astrophysical Journal. 944 (2): 138. arXiv:2212.07399. Bibcode:2023ApJ...944..138V. doi:10.3847/1538-4357/acab58. ISSN 0004-637X.
^ Manjavacas, Elena; Miles-Páez, Paulo A.; Karalidi, Theodora; Vos, Johanna M.; Galloway, Max L.; Girard, Julien H. (2023-04-01). "Time-resolved Optical Polarization Monitoring of the Most Variable Brown Dwarf". The Astronomical Journal. 165 (4): 181. arXiv:2303.06144. Bibcode:2023AJ....165..181M. doi:10.3847/1538-3881/acc317. ISSN 0004-6256.
^ Burgasser, Adam J.; Cruz, Kelle L.; Cushing, Michael; Gelino, Christopher R.; Looper, Dagny L.; Faherty, Jacqueline K.; Kirkpatrick, J. Davy; Reid, I. Neill (2010). "SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition". The Astrophysical Journal. 710 (2): 1142–1169. arXiv:0912.3808. Bibcode:2010ApJ...710.1142B. doi:10.1088/0004-637X/710/2/1142. S2CID 30729652.
^ Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (30 April 2021). "The 10 parsec sample in the Gaia era". Astronomy & Astrophysics. 650: A201. arXiv:2104.14972. Bibcode:2021A&A...650A.201R. doi:10.1051/0004-6361/202140985. S2CID 233476431.
^ Kirkpatrick, J. Davy; Gelino, Christopher R.; et al. (March 2021). "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs". The Astrophysical Journal Supplement Series. 253 (1): 7. arXiv:2011.11616. Bibcode:2021ApJS..253....7K. doi:10.3847/1538-4365/abd107. S2CID 227126954.
^ Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (6 February 2023), The 10 parsec sample in the Gaia era: First update, arXiv:2302.02810, doi:10.5281/zenodo.7576096

[A-1] [a b] Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.

[C-2] [a b] "2MASS J21392676+0220226". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 19 december 2016.

[B-3] [a b c d e f g h i j k l m n o p] Zhang, Zhoujian; Liu, Michael C.; et al. (April 2021). "The Hawaii Infrared Parallax Program. V. New T-dwarf Members and Candidate Members of Nearby Young Moving Groups". The Astrophysical Journal. 911 (1): 7. arXiv:2102.05045. Bibcode:2021ApJ...911....7Z. doi:10.3847/1538-4357/abe3fa. S2CID 231861787.

[SIMBAD-4] ttps://simbad.cds.unistra.fr/simbad/sim-id?Ident=2MUCD+20912. Hämtad 2025-03-09.

[E-5] Andrew Fazekas. "Colossal Storm May Rage on Jupiter-like 'Failed Star'".

[F-6] Dean Praetorius. "Brown Dwarf May Be Host To Massive, Violent Mega Storm". The Huffington Post, 9/13/2011.

[G-7] Lew, Ben W. P.; Apai, Dániel; Zhou, Yifan; Radigan, Jacqueline; Marley, Mark; Schneider, Glenn; Cowan, Nicolas B.; Miles-Páez, Paulo A.; Manjavacas, Elena; Karalidi, Theodora; Bedin, L. R.; Lowrance, Patrick J.; Burgasser, Adam J. (2020), "Cloud Atlas: Weak Color Modulations Due to Rotation in the Planetary-mass Companion GU PSC b and 11 Other Brown Dwarfs", The Astronomical Journal, 159 (3): 125, arXiv:1912.02812, Bibcode:2020AJ....159..125L, doi:10.3847/1538-3881/ab5f59, S2CID 208637110

[H-8] Vos, Johanna M.; Burningham, Ben; Faherty, Jacqueline K.; Alejandro, Sherelyn; Gonzales, Eileen; Calamari, Emily; Bardalez Gagliuffi, Daniella; Visscher, Channon; Tan, Xianyu; Morley, Caroline V.; Marley, Mark; Gemma, Marina E.; Whiteford, Niall; Gaarn, Josefine; Park, Grace (2023-02-01). "Patchy Forsterite Clouds in the Atmospheres of Two Highly Variable Exoplanet Analogs". The Astrophysical Journal. 944 (2): 138. arXiv:2212.07399. Bibcode:2023ApJ...944..138V. doi:10.3847/1538-4357/acab58. ISSN 0004-637X.

[I-9] Manjavacas, Elena; Miles-Páez, Paulo A.; Karalidi, Theodora; Vos, Johanna M.; Galloway, Max L.; Girard, Julien H. (2023-04-01). "Time-resolved Optical Polarization Monitoring of the Most Variable Brown Dwarf". The Astronomical Journal. 165 (4): 181. arXiv:2303.06144. Bibcode:2023AJ....165..181M. doi:10.3847/1538-3881/acc317. ISSN 0004-6256.

[J-10] Burgasser, Adam J.; Cruz, Kelle L.; Cushing, Michael; Gelino, Christopher R.; Looper, Dagny L.; Faherty, Jacqueline K.; Kirkpatrick, J. Davy; Reid, I. Neill (2010). "SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition". The Astrophysical Journal. 710 (2): 1142–1169. arXiv:0912.3808. Bibcode:2010ApJ...710.1142B. doi:10.1088/0004-637X/710/2/1142. S2CID 30729652.

[K-11] Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (30 April 2021). "The 10 parsec sample in the Gaia era". Astronomy & Astrophysics. 650: A201. arXiv:2104.14972. Bibcode:2021A&A...650A.201R. doi:10.1051/0004-6361/202140985. S2CID 233476431.

[L-12] Kirkpatrick, J. Davy; Gelino, Christopher R.; et al. (March 2021). "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs". The Astrophysical Journal Supplement Series. 253 (1): 7. arXiv:2011.11616. Bibcode:2021ApJS..253....7K. doi:10.3847/1538-4365/abd107. S2CID 227126954.

[M-13] Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (6 February 2023), The 10 parsec sample in the Gaia era: First update, arXiv:2302.02810, doi:10.5281/zenodo.7576096

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