Qatar-5 is a faint G-dwarf star that hosts a planet in the constellation Andromeda. With an apparent magnitude of 12.82, it is impossible to see with the naked eye, and can be detected with a powerful telescope. Qatar-5 is currently located about 1,211 light years away based on parallax.

Properties

This star is a relatively young star with an age of only 5.47 billion years. At this age, it is still on the main sequence. Qatar-5 has 112.8% the mass of the Sun, and 107.6% the latter's radius. Despite all of this, it has 113% of the Sun's luminosity, which corresponds to an effective temperature of 5,746 K. Qatar-5 rotates at a rate of 10.4 km/s.

Planetary system

In 2016, the Qatar Exoplanet Survey discovered a planet around this star.

The Qatar-5 planetary system[3]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 4.32±0.18 MJ 0.04127±0.00067 2.8792319 0 88.74±0.87° 1.107±0.064 RJ

Qatar-5b

Qatar-5b is a Hot Jupiter orbiting the star Qatar-5 located in Andromeda constellation.[5] It orbits its star every 2.87 days. It was discovered in 2016 by the Qatar Exoplanet Survey (QES).[6][4]

Discovery

This planet was discovered by QES along with Qatar-3b and Qatar-4b. The light curves of the planet's respective host stars have been observed as well during the survey, along with their stellar properties[7]

Properties

Orbit

This planet is another typical hot Jupiter. It orbits very close to its star with a period of 2 days, 21 hours, 6 minutes, and 5.6 seconds.[8] This corresponds with an orbital distance of 0.04127 AU, which is about 10 times closer to its star than Mercury is to the Sun. With an eccentricity of 0, this suggests that Qatar-5b is on a perfectly circular orbit.

Physical properties

Qatar-5b is a massive planet, with 4.32 times the mass of Jupiter, but a similar radius. With a density of 3.95 g cm−3, this is one of the densest planets discovered. With an effective temperature of 1,415 K, it is a scorching planet.

See also

References

  1. ^ a b c d Gaia Collaboration (2018-04-01). "VizieR Online Data Catalog: Gaia DR2 (Gaia Collaboration, 2018)". VizieR Online Data Catalog. 1345. Bibcode:2018yCat.1345....0G. doi:10.26093/cds/vizier.1345.
  2. ^ a b c d Alsubai, Khalid; Mislis, Dimitris; Tsvetanov, Zlatan I.; Latham, David W.; Bieryla, Allyson; Buchhave, Lars A.; Esquerdo, Gilbert A.; Bramich, D. M.; Pyrzas, Stylianos; Vilchez, Nicolas P. E.; Mancini, Luigi (2017-04-01). "Qatar Exoplanet Survey : Qatar-3b, Qatar-4b, and Qatar-5b" (PDF). The Astronomical Journal. 153 (4): 200. arXiv:1606.06882. Bibcode:2017AJ....153..200A. doi:10.3847/1538-3881/aa6340. ISSN 0004-6256. S2CID 119214858.
  3. ^ a b c d e f Wang, Xian-Yu; Wang, Yong-Hao; Wang, Songhu; Wu, Zhen-Yu; Rice, Malena; Zhou, Xu; Hinse, Tobias C.; Liu, Hui-Gen; Ma, Bo; Peng, Xiyan; Zhang, Hui; Yu, Cong; Zhou, Ji-Lin; Laughlin, Gregory (2021), "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves", The Astrophysical Journal Supplement Series, 255 (1): 15, arXiv:2105.14851, Bibcode:2021ApJS..255...15W, doi:10.3847/1538-4365/ac0835, S2CID 235253975
  4. ^ a b c d e f g h i j k Alsubai, Khalid; et al. (2017). "Qatar Exoplanet Survey: Qatar-3b, Qatar-4b, and Qatar-5b". The Astronomical Journal. 153 (4). 200. arXiv:1606.06882. Bibcode:2017AJ....153..200A. doi:10.3847/1538-3881/aa6340. S2CID 119214858.
  5. ^ "Qatar-5". Universe Guide. 15 September 2018. Retrieved 2019-12-27.
  6. ^ "Astronomers discover three 'Qatar' exoplanets".
  7. ^ Alsubai, Khalid; Mislis, Dimitris; Tsvetanov, Zlatan I.; Latham, David W.; Bieryla, Allyson; Buchhave, Lars A.; Esquerdo, Gilbert A.; Bramich, D. M.; Pyrzas, Stylianos; Vilchez, Nicolas P. E.; Mancini, Luigi (2017-04-01). "Qatar Exoplanet Survey : Qatar-3b, Qatar-4b, and Qatar-5b". The Astronomical Journal. 153 (4): 200. arXiv:1606.06882. Bibcode:2017AJ....153..200A. doi:10.3847/1538-3881/aa6340. ISSN 0004-6256.
  8. ^ "Convert a Decimal Time Amount to Days, Hours, Minutes and Second". www.spikevm.com. Retrieved 2021-03-25.
Allikas: https://en.wikipedia.org/wiki/Qatar-5
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