LP 816-60

	LP 816-60
Observationsdata; Epok: J2000.0
Stjärnbild	Stenbocken
Rektascension	20t 52m 33,01678s
Deklination	-16° 58′ 29,0249″
Skenbar magnitud ()	11,458
Stjärntyp
Spektraltyp	M4
Astrometri
Radialhastighet ()	+8,5 km/s
Egenrörelse (µ)	RA: -309,115 mas/år; Dek.: +37,051 mas/år
Parallax ()	177,9312 ± 0,0365
Avstånd	18,330 ± 0,004 lå (5,620 ± 0,001 pc)
Detaljer
Massa	0,224 ± 0,022 M☉
Radie	0,226 ± 0,012 R☉
Temperatur	3 030 ± 27 K
Metallicitet	-0,11 ± 0,07
Vinkelhastighet	2,70 ± 0,66 km/s
Ålder	2,57 +8,15−1,95 miljarder år
Andra beteckningar
	HIP 103039, LP 816-60, NLTT 50038, HIC 103039, HIP 103039, 2MASS J20523304-1658289, NLTT 50038, TYC 6348-400-1, UCAC4 366-181531, WISEA J205232.80-165828.7, Gaia DR3 6882963066420161664, Gaia DR2 6882963066420161664

LP 816-60 är en ensam^[3] stjärna i mellersta delen av stjärnbilden Stenbocken. Den har en skenbar magnitud av ca 11,46^[2] och kräver ett kraftfullt teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 3 på ca 177,9^[5] mas, beräknas den ligga på ett avstånd av ca 18,33 ljusår (ca 5,62 parsec) solen. Den rör sig bort från solen med en heliocentrisk radialhastighet av ca 8,5 km/s.^[4]

Observation[redigera | redigera wikitext]

Upptäcktsnamnet på stjärnan, LP 816-60,^[12] anger att dess upptäckt publicerades mellan 1963 och 1981 i University of Minnesota, Minneapolis.^[13] LP 816-60 är känd åtminstone från 1979, då den ingick i Luytens katalog NLTT.^[9]

Egenskaper[redigera | redigera wikitext]

LP 816-60 är en röd dvärgstjärna i huvudserien av spektraltyp M1.^[3] Den har en massa av ca 0,22^[6] solmassa, en radie av ca 0,27^[6] solradie och har en effektiv temperatur av ca 3 000 K.^[7] Stjärnan har en magnetisk stjärnfläckcykel på 10,6 ± 1,7 år^[14] och svaga magnetfält i kromosfären på i genomsnitt 4,4 G.^[15] Inga massiva exoplaneter upptäcktes kring LP 816-60 i en undersökning 2013.^[3]

Referenser[redigera | redigera wikitext]

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, LP 816-60, 9 maj 2024..

Noter[redigera | redigera wikitext]

^ [a b c] Perryman; et al. (1997). "HIP 103039". The Hipparcos and Tycho Catalogues. Hämtad 2014-11-29.
^ [a b] Koen, C.; Kilkenny, D.; van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society. 403 (4): 1949–1968. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x.
^ [a b c d] Montet, Benjamin T.; Crepp, Justin R.; Johnson, John Asher; Howard, Andrew W.; Marcy, Geoffrey W. (2013), "The Trends High-Contrast Imaging Survey. Iv. The Occurrence Rate of Giant Planets Around M Dwarfs", The Astrophysical Journal, 781: 28, arXiv:1307.5849, doi:10.1088/0004-637X/781/1/28, S2CID 26620552
^ [a b] Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L.; Subasavage, John P.; Vrijmoet, Eliot Halley (2018), "The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs", The Astronomical Journal, 155 (6): 265, arXiv:1804.07377, Bibcode:2018AJ....155..265H, doi:10.3847/1538-3881/aac262, S2CID 53983430
^ [a b c d] Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ [a b c d e] Mann, Andrew W.; Feiden, Gregory A.; Gaidos, Eric; Boyajian, Tabetha; Braun, Kaspar von (2015), "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius", The Astrophysical Journal, 804 (1): 64, arXiv:1501.01635, Bibcode:2015ApJ...804...64M, doi:10.1088/0004-637X/804/1/64, S2CID 19269312
^ [a b c] Antoniadis-Karnavas, A.; Sousa, S. G.; Delgado-Mena, E.; Santos, N. C.; Teixeira, G. D. C.; Neves, V. (2020), "ODUSSEAS: A machine learning tool to derive effective temperature and metallicity for M dwarf stars", Astronomy & Astrophysics, 636: A9, arXiv:2002.09367, Bibcode:2020A&A...636A...9A, doi:10.1051/0004-6361/201937194, S2CID 211252698
^ Hojjatpanah, S.; Figueira, P.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Delgado-Mena, E.; Alibert, Y.; Cristiani, S.; González Hernández, J. I.; Lanza, A. F.; Di Marcantonio, P.; Martins, J. H. C.; Micela, G.; Molaro, P.; Neves, V.; Oshagh, M.; Pepe, F.; Poretti, E.; Rojas-Ayala, B.; Rebolo, R.; Suárez Mascareño, A.; Zapatero Osorio, M. R. (2019), "Catalog for the ESPRESSO blind radial velocity exoplanet survey", Astronomy & Astrophysics, 629: A80, arXiv:1908.04627, Bibcode:2019A&A...629A..80H, doi:10.1051/0004-6361/201834729, S2CID 199552090
^ [a b] Luyten, Willem Jacob (1979). "NLTT 50038". NLTT Catalogue.
^ Perryman; et al. (1997). "HIP 103039". The Hipparcos and Tycho Catalogues. Retrieved 2014-11-29.
^ Hämtad 2024-07-01.
^ Kirkpatrick, J. Davy; Gelino, Christopher R.; Cushing, Michael C.; Mace, Gregory N.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Mainzer, Amy K.; Burgasser, Adam J.; Tinney, Chris G.; Parker, Stephen; Salter, Graeme (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal. 753 (2): 156. arXiv:1205.2122. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156. S2CID 119279752.
^ Dictionary of Nomenclature of Celestial Objects. LP entry. SIMBAD. Centre de Données astronomiques de Strasbourg.
^ Suárez Mascareño, A.; Rebolo, R.; González Hernández, J. I. (2016), "Magnetic cycles and rotation periods of late-type stars from photometric time series", Astronomy & Astrophysics, 595: A12, arXiv:1607.03049, Bibcode:2016A&A...595A..12S, doi:10.1051/0004-6361/201628586, S2CID 118555782
^ Moutou, C.; Hébrard, E. M.; Morin, J.; Malo, L.; Fouqué, P.; Torres-Rivas, A.; Martioli, E.; Delfosse, X.; Artigau, E.; Doyon, R. (2017), "SPIRou input catalogue: Activity, rotation and magnetic field of cool dwarfs", Monthly Notices of the Royal Astronomical Society, 472 (4): 4563–4586, arXiv:1709.01650, Bibcode:2017MNRAS.472.4563M, doi:10.1093/mnras/stx2306

Externa länkar[redigera | redigera wikitext]

https://www.universeguide.com/star/124114/lp81660

[A-1] [a b c] Perryman; et al. (1997). "HIP 103039". The Hipparcos and Tycho Catalogues. Hämtad 2014-11-29.

[B-2] [a b] Koen, C.; Kilkenny, D.; van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society. 403 (4): 1949–1968. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x.

[C-3] [a b c d] Montet, Benjamin T.; Crepp, Justin R.; Johnson, John Asher; Howard, Andrew W.; Marcy, Geoffrey W. (2013), "The Trends High-Contrast Imaging Survey. Iv. The Occurrence Rate of Giant Planets Around M Dwarfs", The Astrophysical Journal, 781: 28, arXiv:1307.5849, doi:10.1088/0004-637X/781/1/28, S2CID 26620552

[D-4] [a b] Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L.; Subasavage, John P.; Vrijmoet, Eliot Halley (2018), "The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs", The Astronomical Journal, 155 (6): 265, arXiv:1804.07377, Bibcode:2018AJ....155..265H, doi:10.3847/1538-3881/aac262, S2CID 53983430

[E-5] [a b c d] Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[F-6] [a b c d e] Mann, Andrew W.; Feiden, Gregory A.; Gaidos, Eric; Boyajian, Tabetha; Braun, Kaspar von (2015), "How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius", The Astrophysical Journal, 804 (1): 64, arXiv:1501.01635, Bibcode:2015ApJ...804...64M, doi:10.1088/0004-637X/804/1/64, S2CID 19269312

[H-7] [a b c] Antoniadis-Karnavas, A.; Sousa, S. G.; Delgado-Mena, E.; Santos, N. C.; Teixeira, G. D. C.; Neves, V. (2020), "ODUSSEAS: A machine learning tool to derive effective temperature and metallicity for M dwarf stars", Astronomy & Astrophysics, 636: A9, arXiv:2002.09367, Bibcode:2020A&A...636A...9A, doi:10.1051/0004-6361/201937194, S2CID 211252698

[G-8] Hojjatpanah, S.; Figueira, P.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Delgado-Mena, E.; Alibert, Y.; Cristiani, S.; González Hernández, J. I.; Lanza, A. F.; Di Marcantonio, P.; Martins, J. H. C.; Micela, G.; Molaro, P.; Neves, V.; Oshagh, M.; Pepe, F.; Poretti, E.; Rojas-Ayala, B.; Rebolo, R.; Suárez Mascareño, A.; Zapatero Osorio, M. R. (2019), "Catalog for the ESPRESSO blind radial velocity exoplanet survey", Astronomy & Astrophysics, 629: A80, arXiv:1908.04627, Bibcode:2019A&A...629A..80H, doi:10.1051/0004-6361/201834729, S2CID 199552090

[J-9] [a b] Luyten, Willem Jacob (1979). "NLTT 50038". NLTT Catalogue.

[K-10] Perryman; et al. (1997). "HIP 103039". The Hipparcos and Tycho Catalogues. Retrieved 2014-11-29.

[SIMBAD-11] Hämtad 2024-07-01.

[L-12] Kirkpatrick, J. Davy; Gelino, Christopher R.; Cushing, Michael C.; Mace, Gregory N.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Mainzer, Amy K.; Burgasser, Adam J.; Tinney, Chris G.; Parker, Stephen; Salter, Graeme (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal. 753 (2): 156. arXiv:1205.2122. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156. S2CID 119279752.

[M-13] Dictionary of Nomenclature of Celestial Objects. LP entry. SIMBAD. Centre de Données astronomiques de Strasbourg.

[I-14] Suárez Mascareño, A.; Rebolo, R.; González Hernández, J. I. (2016), "Magnetic cycles and rotation periods of late-type stars from photometric time series", Astronomy & Astrophysics, 595: A12, arXiv:1607.03049, Bibcode:2016A&A...595A..12S, doi:10.1051/0004-6361/201628586, S2CID 118555782

[N-15] Moutou, C.; Hébrard, E. M.; Morin, J.; Malo, L.; Fouqué, P.; Torres-Rivas, A.; Martioli, E.; Delfosse, X.; Artigau, E.; Doyon, R. (2017), "SPIRou input catalogue: Activity, rotation and magnetic field of cool dwarfs", Monthly Notices of the Royal Astronomical Society, 472 (4): 4563–4586, arXiv:1709.01650, Bibcode:2017MNRAS.472.4563M, doi:10.1093/mnras/stx2306

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