“VHS 1256-1257”的意思、由来-开放百科全书

词条

VHS 1256-1257

释义

VHS 1256-1257 b
References

{{refimprove|date=January 2017}}{{Starbox begin
| name = VHS 1256-1257
}}{{Starbox observe
| epoch = J2000.0
| constell = Corvus
| ra = {{RA|12|56|02.0}}
| dec = {{DEC|-12|57|24}}
| appmag_v = 17.759 ± 0.059
}}{{Starbox character
| class = M7.5 ± 0.5{{cn|date=January 2017}}
}}{{Starbox astrometry
| radial_v = -1.4 ± 4.5
| prop_mo_ra = -281.5 ± 5.3
| prop_mo_dec = -205.5 ± 15.2
| parallax = 78.79
| p_error = 6.4
| parallax_footnote = ^[1]
}}{{Starbox detail
| age_myr = 225 ± 75{{cn|date=January 2017}}
| mass = 0.07 ± 0.015{{cn|date=January 2017}}
| gravity = 5.05 ± 0.1 cm/s{{cn|date=January 2017}}
| luminosity = -3.14 ± 0.1{{what|date=January 2017}}
| temperature = 2,620 ± 140{{cn|date=January 2017}}
}}{{Starbox catalog
| names = VHS J125601.92-125723.9, WISE J125601.94-125723.7, 2MASS J12560215-1257217
}}{{Starbox end}}VHS J125601.92-125723.9 (abbreviated as VHS 1256-1257 or HSV 1 256) is a red dwarf of spectral type M7.5 located approximately 13 parsecs from the sun, which was discovered by a team led by the Polish astronomer Bartosz Gauza. It is the central object of a planetary system with one known confirmed planet, VHS 1256-1257 b.^[1]

VHS 1256-1257 b

The brown dwarf's only discovered companion planet was first identified and documented by the 2MASS survey in 2015. It orbits at a distance of 102 ± 9 AU and has an estimated mass of approximately 11 times Jupiter's,^[2] which is close to the minimum mass required for the thermonuclear fusion of deuterium.

References

1. ^{{cite web|title=Planet VHS 1256-1257 b|url=http://exoplanet.eu/catalog/vhs_1256-1257_b/}}
2. ^¹{{Cite journal|title=Discovery of a young planetary mass companion to the nearby M dwarf VHS J125601.92-125723.9|journal=The Astrophysical Journal|volume=804|issue=2|pages=96|arxiv=1505.00806|last1=Gauza|first1=Bartosz|last2= Béjar|first2=Victor J. S.|last3=Pérez-Garrido|first3=Antonio|author4=Maria Rosa Zapatero Osorio|last5=Lodieu|first5=Nicolas|last6=Rebolo|first6=Rafael|last7=Pallé|first7=Enric|last8=Nowak|first8=Grzegorz|year=2015|doi=10.1088/0004-637X/804/2/96|bibcode = 2015ApJ...804...96G }}

4 : Brown dwarfs|M-type main-sequence stars|L-type stars|Corvus (constellation)

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