| 词条 | NGTS-1b |
| 释义 |
| name = NGTS-1b | image = HD189733b.jpg | caption = Typical hot Jupiter orbiting its host star (artist concept). | discoverer = Next-Generation Transit Survey[1] | discovered = 2017 | discovery_method = NGTS telescopes together with EulerCam photometric and HARPS spectroscopy followups. | apsis = astron | semimajor = {{convert|0.0326|AU|km|abbr=on}}[1] | eccentricity = 0.016[1] | period = 2.6473 JD[1] d | inclination = 82.8[1] | star = NGTS-1[6] | mean_radius = 1.33[1] {{Jupiter radius|link=y}} | mass = 0.812[1] {{Jupiter mass|link=y}} | single_temperature = 790.0[1] }}NGTS-1b is a confirmed hot Jupiter-sized extrasolar planet orbiting NGTS-1, a red dwarf star about half the mass and radius of the Sun, every 2.65 days.[2] The NGTS-1 system is about 600 light-years from Earth in the Columba constellation.[3][4][5] DiscoveryThe exoplanet, NGTS-1b, was discovered by the Next-Generation Transit Survey.[4] Daniel Bayliss, of the University of Warwick, and lead author of the study describing the discovery of NGTS-1b, stated, "The discovery of NGTS-1b was a complete surprise to us—such massive planets were not thought to exist around such small stars – importantly, our challenge now is to find out how common these types of planets are in the Galaxy, and with the new Next-Generation Transit Survey facility we are well-placed to do just that."[5] CharacteristicsMass, radius and temperatureNGTS-1b is a hot Jupiter-sized gas giant exoplanet that has a mass of 0.812 MJ and a radius of 1.33 RJ, where MJ and RJ are the mass and radius of Jupiter.[3][4] Host starThe planet orbits an M0.5 dwarf star about half the mass ({{solar mass|0.617}}) and radius ({{solar radius|0.573}}) of the Sun.[4][1] OrbitNGTS-1b orbits about {{convert|4.5|e6km|e6mi|abbr=unit}} from the host star every 2.6473 Earth-days.[3][4][1][6] See also
References1. ^1 2 3 4 5 6 7 8 {{cite web |author=Staff |title=Planet NGTS-1 b |url=http://exoplanet.eu/catalog/ngts-1_b/ |date=2017 |work=Extrasolar Planets Encyclopaedia |accessdate=1 November 2017 }} 2. ^{{cite web |last=Griffini |first=Andrew |title=Huge 'monster' planet could challenge scientists' theory of how worlds form |url=https://timesofindia.indiatimes.com/home/science/huge-monster-planet-could-challenge-scientists-theory-of-how-worlds-form/articleshow/61456042.cms |date=2 November 2017 |work=Times of India |accessdate=2 November 2017 }} 3. ^1 2 3 {{Cite journal|author=Bayliss, Danile |display-authors=etal |title=NGTS-1b: A hot Jupiter transiting an M-dwarf |journal=Monthly Notices of the Royal Astronomical Society |volume=475 |issue=4 |pages=4467 |arxiv=1710.11099 |date=31 October 2017|doi=10.1093/mnras/stx2778 |bibcode=2018MNRAS.475.4467B }} 4. ^1 2 3 4 5 {{cite web |last=Lewin |first=Sarah |title=Monster Planet, Tiny Star: Record-Breaking Duo Puzzles Astronomers |url=https://www.space.com/38625-monster-planet-circles-tiny-star.html |date=31 October 2017 |work=Space.com |accessdate=1 November 2017 }} 5. ^1 {{cite web |author=Staff |title='Monster' planet discovery challenges formation theory |url=https://phys.org/news/2017-10-monster-planet-discovery-formation-theory.html |date=31 October 2017 |work=Phys.org |accessdate=1 November 2017 }} 6. ^{{cite web |last=Dvorsky |first=George |title=This Tiny Star Hosts a Planet Nearly the Size of Jupiter |url=https://gizmodo.com/this-tiny-star-hosts-a-planet-nearly-the-size-of-jupite-1820017394 |date=31 October 2017 |work=Gizmodo |accessdate=1 November 2017 }} External links
4 : Columba (constellation)|Exoplanets discovered in 2017|Hot Jupiters|M-type main-sequence stars |
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