Nevertheless,
Surprising rocky worlds revealed around new: Similarly,
Surprising rocky worlds revealed around:
Charles Cadieux, the Irex researcher who conducted the study on the L 98-59 system.
Credit: courtesy
A team led by the Trottier of Research Institute on exoplanets of. Consequently. Additionally, Consequently, the University of Montreal publishes the most precise study to date of the planetary system of the star LP 98-59. Moreover, This study confirms in particular the existence of a fifth planet located in the living area. Similarly, where the conditions could allow the presence of liquid surprising rocky worlds revealed around new water.
Located only 35 light years from the earth. Moreover. For example, the small star L 98-59, a red surprising rocky worlds revealed around dwarf, shelters three small exoplanets discovered in 2019 thanks to the NASA Tess space telescope and a fourth planet, identified by the radial speed method, using the espresso spectrographer of the European Austral Observatory (ESO). Consequently, These four planets gravitate very close to their star. Nevertheless, are all included inside a distance five times smaller than that which separates Mercury from the Sun.
Volcanic worlds. Furthermore. Nevertheless, a “underground” and an “ocean planet” – Surprising rocky worlds revealed around – Surprising rocky worlds revealed around new
By reanalyzing a vast set of data from telescopes on the ground and in space, a team led by Charles Cadieux, researcher at the University of Montreal and at IREX, was able to determine the sizes and masses of these planets with unequaled precision.
“These new surprising rocky worlds revealed around new results offer us the most complete portrait to date in the L 98-59 system,” says Charles Cadieux. Furthermore, It is a fine example of the power to combine data from space surprising rocky worlds revealed around telescopes. Consequently, high precision instruments on the ground. In addition, And the planets of this system constitute promising targets to observe with the James Webb space telescope. Nevertheless, ”
All the planets of the system have sizes and masses compatible with rocky worlds. Therefore, The closest to the star. Similarly. Consequently, L 98-59 B, is just 84 % of the diameter of the earth and has about half of its mass, which makes it one of the rare “undergrounds” well characterized to date.
The first two planets could be the scene of intense volcanic activity caused by tidal heating. Meanwhile, a bit like the Moon Io around Jupiter. Nevertheless, As for the third. its surprising rocky worlds revealed around new surprisingly weak density suggests that it could be an “ocean planet”. rich in water, different from all the planets of the solar system.
Thanks to refined measures. researchers have also shown that internal planets are almost perfectly circular. surprising rocky worlds revealed around an advantage for future atmospheric observations.
“With its diversity of rocky worlds which undoubtedly have a range of compositions. the L 98-59 system is a unique laboratory to explore some of the major questions in our field: what are super-terres. sub-neptuans made? Are the planets formed differently around small stars? And can the rocky planets around the red dwarfs keep their atmosphere over time? ”, Adds René Doyon, professor at Udem, director of the IREX and co-author of the study.
Surprising rocky worlds revealed around new
A fifth planet in the living area – Surprising rocky worlds revealed around new
Surprising rocky worlds revealed around
Rather than. soliciting new observation time. the team has taken surprising rocky worlds revealed around new advantage of a rich set of archive data from the Tess space telescope. Harps and Espresso spectrographs in Chile, and the James Webb space telescope.
L 98-59 F receives an amount of energy comparable to that which the earth receives from the sun. which places it in surprising rocky worlds revealed around full in the temperate zone (sometimes called habitable zone) where. water could exist in the liquid state.
“Finding a temperate planet in such a compact system makes this discovery particularly exciting,” emphasizes Charles Cadieux. This highlights all the diversity of exoplanetary systems. strengthens the interest of carrying out studies on the potentially habitable worlds around low -mass stars. ”
Reveal the invisible in existing data
Rather than soliciting new observation time. the team has taken advantage of a rich set of archive data from the Tess space telescope. Harps and Espresso spectrographs in Chile, and the James surprising rocky worlds revealed around new Webb space telescope.
Scientists have used an innovative radial speed analysis method. developed by the IREX team in 2022, which makes it possible to significantly improve data accuracy. By also using a new technique to finely measure the temperature variations of the star. they were able to isolate better. remove the surprising rocky worlds revealed around noise due to the activity of the star, thus revealing the planetary signals with a clarity ever reached.
By integrating these refined measures into the analysis of the transits detected by the webb telescope. the team has doubled the precision of the mass and radius estimates of the known planets.
“These techniques have been designed to exploit all the potential hidden in archive data. ” says Étienne Artigau, researcher at UDEM and study co -author. “It is a great demonstration that improving analysis tools can allow us to push the boundaries of what we surprising rocky worlds revealed around new know. simply by revisiting already available data.”
Next step: Webb
These discoveries place the 98-59 as one of the most interesting planetary systems near the. earth to study the diversity of rocky planets. and possibly, to seek signs of life.
Its proximity. the small size of its star. as well as the variety of compositions surprising rocky worlds revealed around and planetary orbits make it an ideal system to probe the atmosphere of the planets with the James Webb space telescope, observations that have already been started by the IREX team.
“With these new results. L 98-59 joins the group of choice for compact planetary systems close to us whose mysteries we hope to unravel in the coming years. ” concludes Alexandrine L’Heureux, doctoral student at Udem and co-authority of the study. “It is exciting to see this system join that of Trappist-1 in the list of places that surprising rocky worlds revealed around new will allow. us to better understand the nature. formation of small planets around the red dwarfs.”
About this study
The article “Detaied Architecture of the L 98-59 System. Confirmation of A Fifth Planet in the Habitable Zone” will appear in the coming days in the journal The. Astronomical Journal. The study. directed by Charles Cadieux. brings together the co-authors Alexandrine surprising rocky worlds revealed around L’Heureux, Caroline Piaulet-Ghorayeb (University of Chicago), René Doyon, Étienne Artigau, Neil J. Cook. Louis-Philippe Coulombe. Pierre-Alexis Roy, David Lafrenière, Pierrot Lamontagne, Michael Radica (University of Chicago), and Björn Benneke, affiliated with the irex of the Udem. The other employees are Eva-Maria Ahrer (Max Planck Institute for Astronomy, Germany), Drew Weisserman and Ryan Cloutier (McMaster University, Canada).
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