Draft:TWA 7b
 | Draft article not currently submitted for review.
This is a draft Articles for creation (AfC) submission. It is not currently pending review. While there are no deadlines, abandoned drafts may be deleted after six months. To edit the draft click on the "Edit" tab at the top of the window. To be accepted, a draft should:
It is strongly discouraged to write about yourself, your business or employer. If you do so, you must declare it. Where to get help
How to improve a draft
You can also browse Wikipedia:Featured articles and Wikipedia:Good articles to find examples of Wikipedia's best writing on topics similar to your proposed article. Improving your odds of a speedy review To improve your odds of a faster review, tag your draft with relevant WikiProject tags using the button below. This will let reviewers know a new draft has been submitted in their area of interest. For instance, if you wrote about a female astronomer, you would want to add the Biography, Astronomy, and Women scientists tags. Editor resources
Last edited by Citation bot (talk | contribs) 4 seconds ago. (Update) |
| Discovery | |
|---|---|
| Discovered by | James Webb Space Telescope (JWST), Very Large Telescope (VLT) |
| Discovery date | 2024 |
| Direct imaging | |
| Orbital characteristics | |
| ≈52 AU (estimated) | |
| Eccentricity | Unknown |
| Unknown | |
| Star | TWA 7 |
| Physical characteristics | |
| Mass | ≈0.3 Jupiter masses |
| Temperature | Unknown |
TWA 7 b is a directly imaged exoplanet candidate orbiting the M-type star TWA 7, located in the constellation Hydra[1][2][3]. The planetary system is situated within a young stellar association, and the exoplanet resides within a well-defined debris disk structure[1][4][5][6]. If TWA 7 b is conformed it to be distinguished as the first exoplanet directly detected by the James Webb Space Telescope (JWST), utilizing the Mid-Infrared Instrument (MIRI) in 2024.
Characteristics
[edit]TWA 7 b is estimated to possess a mass approximately 0.3 times that of Jupiter, categorizing it as a Saturn-mass exoplanet[1][2][7]. It is located within the inner gap of a multi-ringed debris disk, and its gravitational influence is considered a likely factor in shaping the disk structure. The exoplanet orbits at an approximate distance of 52 Astronomical unit[7] from its host star, although its orbital eccentricity and period remain undetermined.
Discovery
[edit]The presence of TWA 7 b is being confirmed through a combination of observations from the Very Large Telescope (VLT) and the James Webb Space Telescope[1][7]. The planet was identified as an candidate using high-contrast coronagraphic imaging with JWST's MIRI instrument[1][7]. The detection was supported by earlier submillimeter data and disk structure models predicting the presence of a planetary companion[4][5][5][7].
Host Star
[edit]TWA 7 is a young M-type red dwarf star[1][2][3], estimated to be approximately five million years old. It is a member of the TW Hydrae association, a nearby stellar group known for its youth and active planetary formation. The star exhibits a complex debris disk system just like our own Solar System[4][5][6][7].
Significance
[edit]TWA 7 b represents the lowest mass exoplanet if confirmed through direct imaging to date and is the first such object discovered by JWST[1][2][7]. Its detection provides valuable insight into the early stages of planetary formation and the interaction between young planets and circumstellar debris disks.
See also
[edit]References
[edit]- ^ a b c d e f g "Likely Saturn-Mass Planet Imaged by NASA Webb Is Lightest Ever Seen - NASA Science". 2025-06-25. Retrieved 2025-06-28.
- ^ a b c d "Webb finds evidence of a lightweight planet around TWA 7". www.esa.int. Retrieved 2025-06-28.
- ^ a b [email protected] (2025-06-26). "Webb's discovery of exoplanet TWA 7 b". BBC Sky at Night Magazine. Retrieved 2025-06-28.
- ^ a b c Choquet, Élodie; Perrin, Marshall D.; Chen, Christine H.; Soummer, Rémi; Pueyo, Laurent; Hagan, James B.; Gofas-Salas, Elena; Rajan, Abhijith; Golimowski, David A.; Hines, Dean C.; Schneider, Glenn; Mazoyer, Johan; Augereau, Jean-Charles; Debes, John; Stark, Christopher C.; Wolff, Schuyler; n'Diaye, Mamadou; Hsiao, Kevin (2016). "First Images of Debris Disks Around Twa 7, Twa 25, Hd 35650, and Hd 377". The Astrophysical Journal Letters. 817 (1): L2. arXiv:1512.02220. Bibcode:2016ApJ...817L...2C. doi:10.3847/2041-8205/817/1/l2.
- ^ a b c d Ren 任, Bin 彬; Choquet, Élodie; Perrin, Marshall D.; Mawet, Dimitri; Chen, Christine H.; Milli, Julien; Debes, John H.; Rebollido, Isabel; Stark, Christopher C.; Hagan, J. Brendan; Hines, Dean C.; Millar-Blanchaer, Maxwell A.; Pueyo, Laurent; Roberge, Aki; Schneider, Glenn (2021-06-01). "A Layered Debris Disk around M Star TWA 7 in Scattered Light". The Astrophysical Journal. 914 (2): 95. arXiv:2105.09949. Bibcode:2021ApJ...914...95R. doi:10.3847/1538-4357/ac03b9. ISSN 0004-637X.
- ^ a b Olofsson, J.; Holstein, R. G. van; Boccaletti, A.; Janson, M.; Thébault, P.; Gratton, R.; Lazzoni, C.; Kral, Q.; Bayo, A. (2018-04-05), "Resolving faint structures in the debris disk around TWA 7", Astronomy & Astrophysics, 617: A109, arXiv:1804.01929, doi:10.1051/0004-6361/201832583, retrieved 2025-06-28
- ^ a b c d e f g Lagrange, A.-M.; Wilkinson, C.; Mâlin, M.; Boccaletti, A.; Perrot, C.; Matrà, L.; Combes, F.; Beust, H.; Rouan, D.; Chomez, A.; Milli, J.; Charnay, B.; Mazevet, S.; Flasseur, O.; Olofsson, J. (2025-06-25). "Evidence for a sub-Jovian planet in the young TWA 7 disk". Nature: 1–4. doi:10.1038/s41586-025-09150-4. ISSN 1476-4687. PMID 40562924.