| 词条 | HD 40307 e |
| 释义 |
| name = HD 40307 e | discoverer = Mikko Tuomi et al. | discovery_site = La Silla Observatory, Chile | discovered = October 28, 2012 | discovery_method = radial velocity, using HARPS | apsis = astron | semimajor = 0.1886 [0.1782, 0.1969] AU | eccentricity = 0.06 [0, 0.18][1] | period = 34.62 [34.42, 34.83][1] d | semi-amplitude = 0.84 [0.53, 1.16][1] | star = HD 40307 }}HD 40307 e is an extrasolar planet orbiting the star HD 40307. It is located 42 light-years away in the direction of the southern constellation Pictor. The planet was discovered by the radial velocity method, using the European Southern Obervatory's HARPS apparatus[1][2][3] by a team of astronomers led by Mikko Tuomi at the University of Hertfordshire and Guillem Anglada-Escude of the University of Goettingen, Germany.[4] Its minimum mass is 3.5 that of Earth - the smallest - and dynamical models suggest it cannot be much more (and so is measured close to edge-on).[1] It further gets roughly the same insolation from its star as Mercury gets from the Sun.[5] Planets like this in that system have been presumed "super-Earth".[6] However planets b, c, and d are presumed to have migrated in from outer orbits; and planet b is predicted a sub-Neptune.[7] It is likely that this planet formed even further out. Whether it is a sub-Neptune, a super-Venus or even a super-Mercury is unknown. {{Wikipedia books|HD 40307}}{{Clear}}References1. ^1 2 3 4 {{cite journal |last=Tuomi |last2=Anglada-Escude |last3=Gerlach |last4=Jones |last5=Reiners |last6=Rivera |last7=Vogt |last8=Butler |first=Mikko |first2=Guillem |first3=Enrico |first4=Hugh R. R. |first5=Ansgar |first6=Eugenio J. |first7=Steven S. |first8=R. Paul |arxiv= 1211.1617v1|title= Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307|date= 2012 |doi=10.1051/0004-6361/201220268 |volume=549 |journal=Astronomy |page=A48 |bibcode=2013A&A...549A..48T}} 2. ^{{cite web |last=Wall |first=Mike |title='Super-Earth' Alien Planet May Be Habitable for Life |url=http://www.space.com/18393-alien-planet-super-earth-habitable-hd-40307g.html |date=November 7, 2012 |publisher=Space.com |accessdate=November 8, 2012 }} 3. ^{{cite web |last=Tate |first=Karl |title=Super-Earth Planet: Potentially Habitable Alien World Explained (Infographic) |url=http://www.space.com/18390-super-earth-exoplanet-habitable-zone-infographic.html |date=November 7, 2012 |publisher=Space.com |accessdate=November 8, 2012 }} 4. ^{{cite web |last=Murrin |first=Marc |title=Astronomers discover a potentially habitable Super-Earth HD 40307g (Infographic) |url=http://www.tech-stew.com/post/2012/11/08/Astronomers-discover-a-potentially-habitable-Super-Earth-HD40307g.aspx |date=November 8, 2012 |publisher=tech-stew.com |accessdate=November 8, 2012 }} 5. ^Tuomi, Fig. 17 6. ^{{cite journal|author= M. Mayor|author2= S. Udry|author3= C. Lovis|author4= F. Pepe|author5= D. Queloz|author6= W. Benz|author7= J.-L. Bertaux|author8= F. Bouchy|author9= C. Mordasini|author10= D. Segransan|title=The HARPS search for southern extra-solar planets. XIII. A planetary system with 3 Super-Earths (4.2, 6.9, & 9.2 Earth masses)|arxiv=0806.4587|bibcode = 2009A&A...493..639M |doi = 10.1051/0004-6361:200810451|date= 2009|journal= Astronomy and Astrophysics|volume= 493|issue= 2|pages= 639–644 }} 7. ^{{cite journal|arxiv=0901.1698|author=Barnes, R.|author2=Jackson, B.|author3=Raymond, S.|author4=West, A.|author5=Greenberg, R.|title=The HD 40307 Planetary System: Super-Earths or Mini-Neptunes?|journal=The Astrophysical Journal|date=2009|doi=10.1088/0004-637X/695/2/1006|volume=695|issue=2|pages=1006–1011|bibcode=2009ApJ...695.1006B}} External links
4 : HD 40307|Pictor (constellation)|Exoplanets discovered in 2012|Exoplanets detected by radial velocity |
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