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The planet TIC 172900988b has been identified on an exoplanet slightly larger than Jupiter in a binary system. Then a team of astronomers has carried out operations on its mission using NASA’s Space Telescope Transiting Exoplanet Survey Satellite (TESS).
The planet has a mass that is almost equal to three times the mass of Jupiter. Then the planet orbits its star at a much further distance than expected.
TESS Temukan Planet TIC 172900988b
According to a paper published in the journal AAS, the newly discovered circumbinary planet is larger than Jupiter.
Then transit the two parent stars. Dr. Veselin Kostov of NASA’s Goddard space Flight Center and colleagues explain about transiting circumbinary planets before the invention of NASA’s Kepler space telescope.
Circumbinary planets are planets that orbit two stars. Then to find transiting planets around ancient binary stars is much more difficult. The reason is, the transit is shallower, noisy, and can adjust to a stellar eclipse.
This is because there is a constant dilution of the third light from the binary companion. In addition, what makes transiting planets difficult to find around single stars is due to the presence of stellar spots and the activity of both.
Baca Juga: Planet yang Bisa Menyusut, Luar Biasa Aktif Kembali
Astronomers began discussing the unusual observed signature of the planet TIC 172900988b when there were multiple transits during a conjunction.
A possible cause of this effect is a planet that transits one or both stars from the parent binary eclipse several times. It occurs during the period of its orbit.
The configuration of such a transit usually depends on the relative celestial projection speed of the circumbinary planet and the star being visited.
Then for the orbital period can be estimated through the transit. Of note, the host system is a double-line spectroscopic binary.
Astronomers are also trying to detect circular planetary transits from the ground before the turn of the century. In addition, there are also single conjunctions which are ultimately hampered by the sampling time.
However, thanks to long lead times and high photometric precision, the Kepler mission made it possible to find many transiting circumbinary planets. Another incident shows that transit tides during a conjunction are common.
Baca Juga: Planet Neraka TOI-1431b, Miliki Suhu Terpanas dan Ukuran 3 Kali Jupiter
Planetary Observations from One Sector of TESS Data Data
Citing theuncoverreality.in, astronomers have found the planet TIC 172900988b transiting the primary star during sector 21. Then after 5 days the secondary star transits. So, the planet produces two transits.
The prominent motion of the binary orbits is the dynamic interaction between the binary and the planets. Then this was also revealed from extensive archive data from various surveys such as ASAS-SN, Evryscope, KELT, and SuperWASP.
Then they also discovered the binary star itself eclipsed. At an orbital period of 19.7 days and an eccentricity of 0.45 the planet TIC 172900988b.
Furthermore, the masses of the stars are 1.24 and 1.2 M, respectively. As for the radii 1.38 and 1.31 R in the primary and secondary stars, respectively.
For a circumbinary planet, the radius is about 11.07 R. However, astronomers cannot uniquely determine its mass and orbital properties. The reason is, there are six solutions with almost the same possibilities.
The possible mass of the planet is in the range of 820 to 980 M. This is for an orbital period of 190 to 205 days and an eccentricity between 0.02 and 0.09.
TIC 172900988b, Planet Masif
This planet larger than Jupiter has a mass equivalent to 2.9 Jupiter masses. This makes it the most massive circling planet. In addition, the dimensions of the planet TIC 172900988b are almost similar to Jupiter during identification.
The planet is too hot to be part of the habitable zone of the system. Then the orbital period is also too long, which is between 189 to 204 days.
Last time, the planet was about 824 light-years from Earth, in the constellation Cancer. Then it became part of a system that spanned 3.1 billion years.
The planet TIC 172900988b has demonstrated the potential for TESS discoveries for circumbinary planets. Then the orbital period far exceeds the duration of the observations. In the end, astronomers concluded that the system could be accessed through high-resolution spectroscopy, such as the Rossiter-McLaughlin effect transit spectroscopy. (R10/HR Online)
Publisher: Jujang
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