NGTS-1b

NGTS-1b
artist's concept of exoplanet NGTS-1b
Discovery
Discovered byNext-Generation Transit Survey[1]
Discovery date2017
NGTS telescopes together with EulerCam photometric and HARPS spectroscopy followups.
Orbital characteristics
0.0326 AU (4,880,000 km)[2]
Eccentricity0.016[2]
2.6473 JD[2] d
Inclination82.8[2]
StarNGTS-1[3]
Physical characteristics
1.33[2] RJ
Mass0.812[2] MJ
Temperature790.0[2] K

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.[4] The NGTS-1 system is about 716 light-years from Earth in the Columba constellation.[3][1][5]

Discovery

The exoplanet, NGTS-1b, was discovered by the Next-Generation Transit Survey.[1] 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]

Characteristics

Mass, radius and temperature

NGTS-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][1]

Host star

Main article: NGTS-1

The planet orbits an M0.5 dwarf star about half the mass (0.617 M☉) and radius (0.573 R☉) of the Sun.[1][2]

Orbit

NGTS-1b orbits about 4.5 million km (2.8 million mi) from the host star every 2.6473 Earth-days.[3][1][2][6]

See also

References

  1. ^ a b c d e f Lewin, Sarah (31 October 2017). "Monster Planet, Tiny Star: Record-Breaking Duo Puzzles Astronomers". Space.com. Retrieved 1 November 2017.
  2. ^ a b c d e f g h i Staff (2017). "Planet NGTS-1 b". Extrasolar Planets Encyclopaedia. Retrieved 1 November 2017.
  3. ^ a b c d Bayliss, Danile; et al. (31 October 2017). "NGTS-1b: A hot Jupiter transiting an M-dwarf". Monthly Notices of the Royal Astronomical Society. 475 (4): 4467–4475. arXiv:1710.11099. Bibcode:2018MNRAS.475.4467B. doi:10.1093/mnras/stx2778. S2CID 39357327.
  4. ^ Griffini, Andrew (2 November 2017). "Huge 'monster' planet could challenge scientists' theory of how worlds form". The Times of India. Retrieved 2 November 2017.
  5. ^ a b Staff (31 October 2017). "'Monster' planet discovery challenges formation theory". Phys.org. Retrieved 1 November 2017.
  6. ^ Dvorsky, George (31 October 2017). "This Tiny Star Hosts a Planet Nearly the Size of Jupiter". Gizmodo. Retrieved 1 November 2017.