Qatar-3

Last updated
Qatar-3
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Andromeda
Right ascension 23h 56m 36.48312s [1]
Declination 36° 12′ 46.7739″ [1]
Apparent magnitude  (V)12.88 [2]
Characteristics
Evolutionary stage main sequence
Spectral type G0V [2]
Variable type planetary transit
Astrometry
Radial velocity (Rv)10.99±3.31 [1]  km/s
Proper motion (μ)RA: −17.763 [1]   mas/yr
Dec.: −8.484 [1]   mas/yr
Parallax (π)1.3316 ± 0.0588  mas [1]
Distance 2,400 ± 100  ly
(750 ± 30  pc)
Absolute magnitude  (MV)3.50
Details [2]
Mass 1.145±0.064  M☉
Radius 1.272±0.14  R☉
Luminosity 1.90±0.46  L☉
Surface gravity (log g)4.28±0.05  cgs
Temperature 5,991±64  K
Metallicity [Fe/H]−0.041±0.081  dex
Rotation 6.31
Rotational velocity (v sin i)10.4±0.5 km/s
Age 310±1  Myr
Other designations
Gaia DR2  2878641361300809856 [3]
Database references

Qatar-3 is a 12th magnitude star located in the northern constellation Andromeda. It is host to a transiting planet. [2] With a radial velocity of 10.99 km/s, it is drifting away from the Solar System, and is currently located 2,400 light years away based on its annual parallax.

Contents

Properties

This star is a hot yellow dwarf with 14.5% more mass than the Sun, and 27.2% larger. It has a luminosity of almost two times that of the Sun, and has effective temperature of 5,991 K, which gives it a yellow hue. Qatar-3 is also a metal poor star that has a similar metallicity to the Sun, and has a rapid rotation rate of 10.4 km/s. This means it takes Qatar-3 6.31 days to complete a full rotation, while the Sun takes almost a month to rotate.

Planetary system

In 2016, the Qatar Exoplanet Survey discovered a planet around Qatar-3, Qatar-4, and Qatar-5, which was led by an international team in Qatar. Qatar-3b is a massive planet, with 4.31 times the mass of Jupiter, and has a similar radius to the latter. With a density of 4.0 g/cm3, this is one of the densest planets discovered. With an effective temperature of 1,681  K , it is a scorching planet. [4]

The Qatar-3 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b4.31 ± 0.47  MJ 0.03783 ± 0.000692.5079204086.8 ± 2.0° 1.096 ± 0.14  RJ

Qatar-3b is a hot Jupiter. [5] It orbits its star every 2.5 days. It was discovered in 2016 by the Qatar Exoplanet Survey(QES). [6] [7] This planet was discovered by QES along with Qatar-4b and Qatar-5b. The light curves of the planet's respective host stars have been observed as well during the survey, along with their stellar properties. [8] [7]

Orbit

This planet is another typical hot Jupiter. It orbits very close to its star with a period of 2 days, 12 hours, 11 minutes, and 24 seconds. [9] This corresponds with an orbital distance of about 0.04 AU, which is 10 times closer to its star than Mercury is to the Sun. With an eccentricity of 0, this suggests that Qatar-3b is on a perfectly circular orbit.

Physical properties

Qatar-3b is a massive planet, with 4.31 times the mass of Jupiter, but a similar radius. With a density if 4.0 g cm−3, this is one of the densest planets discovered. With an effective temperature of 1,681 K, it is a scorched planet. [7]

Related Research Articles

BD−10°3166 is a K-type main sequence star approximately 268 light-years away in the constellation of Crater. It was inconspicuous enough not be included in the Draper catalog (HD). The Hipparcos satellite also did not study it, so its true distance is poorly known. The distance measured by the Gaia spacecraft of 268 light years rules out a suggested companion star, LP 731-076, being its true binary star companion.

The XO Project is an international team of amateur and professional astronomers tasked with identifying extrasolar planets. They are led by Peter R. McCullough of the Space Telescope Science Institute. It is primarily funded by NASA's Origins Program and the Director's Discretionary Fund of the Space Telescope Science Institute.

HD 118203 is a star located in the northern circumpolar constellation of Ursa Major. It has the proper name Liesma, which means flame, and it is the name of a character from the Latvian poem Staburags un Liesma. The name was selected in the NameExoWorlds campaign by Latvia, during the 100th anniversary of the IAU.

Kepler-5 is a star located in the constellation Cygnus in the field of view of the Kepler Mission, a NASA project aimed at detecting planets in transit of, or passing in front of, their host stars as seen from Earth. One closely orbiting, Jupiter-like planet, named Kepler-5b, has been detected around Kepler-5. Kepler-5's planet was one of the first five planets to be discovered by the Kepler spacecraft; its discovery was announced on January 4, 2010 at the 215th meeting of the American Astronomical Society after being verified by a variety of observatories. Kepler-5 is larger and more massive than the Sun, but has a similar metallicity, a major factor in planet formation.

The Kilodegree Extremely Little Telescope is an astronomical observation system formed by two robotic telescopes that are conducting a survey for transiting exoplanets around bright stars. The project is jointly administered by members of Ohio State University Department of Astronomy, the Vanderbilt University Department of Physics and Astronomy Astronomy Group, the Lehigh University Department of Physics, and the South African Astronomical Observatory (SAAO).

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

KELT-18b is a hot Jupiter orbiting the F-type main sequence star KELT-18 approximately 1,058 light years away in the northern circumpolar constellation Ursa Major. The planet was discovered using the transit method, and was announced in June 2017.

<span class="mw-page-title-main">XO-6b</span> Hot Jupiter exoplanet orbiting the star XO-6

XO-6b is a transiting exoplanet, a hot Jupiter, orbiting the star XO-6 around 760 Light Years away from Earth. It was discovered in 2016 by the XO planet search team.

Qatar-1 is an orange main sequence star in the constellation of Draco.

GSC 03949-00967 is a G-type main-sequence star about 1190 light-years away. It is older than the Sun, yet is enriched by heavy elements compared to the Sun, having 160% of solar abundance.

Qatar-2 is a K-type main-sequence star about 595 light-years away. The star is much older than Sun, and has a concentration of heavy elements similar to solar abundance. The star features a numerous and long-lived starspots, and belongs to a peculiar variety of inflated K-dwarfs with strong magnetic activity inhibiting internal convection.

HATS-3 is a F-type main-sequence star. Its surface temperature is 6351±76 K. HATS-3 is relatively depleted in its concentration of heavy elements, with a metallicity Fe/H index of −0.157±0.07, but is slightly younger than the Sun at an age of 3.2+0.6
−0.4 billion years.

The Qatar Exoplanet Survey, also known as QES, is an international exoplanet search survey based in Qatar. Its main goal is to detect exoplanets using the transit method, which is observing the light curve of the host star.

KELT-3 is a star in the zodiac constellation Leo. With an apparent magnitude of 9.82, it is too faint to be seen with the naked eye, but can be detected using a telescope. It is currently located around 690 light years away, based on parallax measurements.

<span class="mw-page-title-main">KELT-3b</span> Exoplanet orbiting KELT-3

KELT-3b is an extrasolar planet orbiting the F-type main-sequence star KELT-3 690 light years in the zodiac constellation Leo. It was discovered in 2013 by KELT's telescope in Arizona.

Qatar-4 is a faint K-dwarf star that hosts a planet in the constellation Andromeda. With an apparent magnitude of 13.60, it is impossible to detect with the naked eye, but can be detected with a powerful telescope. Qatar-4 is currently located 1,083 light years away based on parallax.

Qatar-8 is a faint solar analog located in the northern circumpolar constellation Ursa Major. With an apparent magnitude of 11.71, it is impossible to detect with the naked eye, but can be located with a powerful telescope. Qatar-8 is currently 924 light-years away from the Solar System, but is drifting further away, with a radial velocity of 5.06 km/s.

HD 106315, also known as K2-109, is a F-type main-sequence star about 340 light-years away. The star is relatively metal-poor, having 60% of solar concentration of iron.

References

  1. 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  2. 1 2 3 4 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. S2CID   119214858.
  3. ↑ "Qatar 3". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2021-03-26.
  4. ↑ "Astronomers discover three 'Qatar' exoplanets". phys.org. Retrieved 2021-03-26.
  5. ↑ "Qatar-3". Universe Guide. Retrieved 2019-12-27.
  6. ↑ "Astronomers discover three 'Qatar' exoplanets".
  7. 1 2 3 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.
  8. ↑ 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. S2CID   119214858.
  9. ↑ "Convert a Decimal Time Amount to Days, Hours, Minutes and Second". www.spikevm.com. Retrieved 2021-03-25.
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