Astronomy:TOI-5007 b
| Discovery[1] | |
|---|---|
| Discovered by | Dransfield et al. |
| Discovery date | 2026 |
| Transit method | |
| Orbital characteristics | |
| 0.0307 ± 0.0002 AU | |
| Eccentricity | 0.07 ± 0.03 |
| Orbital period | 2.543372 ± 0.000001 d |
| Inclination | 84.65 ± 0.04° |
| Star | TOI-5007 |
| Physical characteristics | |
| Mean radius | 0.99 ± 0.03 |♃|J}}}}}} |
| Mass | 0.664 ± 0.05 |♃|J}}}}}} |
TOI-5007 b is a gas giant exoplanet orbiting the low-mass red dwarf star TOI-5007, located about 663 light-years away in the constellation of Norma. The planet was discovered using data from NASA's Transiting Exoplanet Survey Satellite (TESS) and confirmed through follow-up photometric and radial velocity observations by the MANGOS collaboration.[1][2]
The discovery of TOI-5007 b is considered significant because giant planets orbiting low-mass M-dwarf stars are comparatively rare and challenge standard models of planetary formation.[1]
Discovery
TOI-5007 b was first identified as a candidate exoplanet by the Transiting Exoplanet Survey Satellite (TESS) through the transit method, in which periodic dips in a star's brightness indicate the possible presence of an orbiting planet.[2]
The planet was later confirmed by the MANGOS (M-dwarf Association for Giant Orbiting Systems) survey using ground-based photometric observations and high-precision radial velocity spectroscopy.[1] Follow-up observations included data from the SPECULOOS Southern Observatory, which successfully observed the transit despite the highly crowded stellar field around TOI-5007.[1]
The discovery paper, titled MANGOS – II. Five new giant planets orbiting low-mass stars, was first released as an arXiv preprint in 2025 and later published in Monthly Notices of the Royal Astronomical Society in 2026.[1]
Characteristics
TOI-5007 b is a hot Jupiter-type gas giant with a mass of about 0.66 times that of Jupiter and a radius close to Jupiter's.[2]
The planet orbits extremely close to its host star at a distance of approximately 0.0307 astronomical units, completing one orbit every 2.54 days.[2] Its orbit has a small but statistically significant eccentricity of about 0.07, though astronomers noted that additional observations are needed to fully constrain the orbit.[1]
Host star
The host star, TOI-5007, is an M1V red dwarf with approximately 63% of the Sun's mass and 66% of its radius.[1] The star has an effective temperature of about 3,793 K, making it significantly cooler than the Sun.[1]
Astronomers estimated the age of the star to be roughly 4 billion years.[1] The system also has a relatively high stellar metallicity, which the MANGOS survey associated with an observed trend of higher bulk densities among giant planets orbiting low-mass stars.[1]
See also
- Hot Jupiter
- Transit method
- List of exoplanets discovered in 2026
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Dransfield, G. (2026). "MANGOS – II. Five new giant planets orbiting low-mass stars". Monthly Notices of the Royal Astronomical Society 547 (4). doi:10.1093/mnras/stag448.
- ↑ 2.0 2.1 2.2 2.3 "TOI-5007 b". https://science.nasa.gov/exoplanet-catalog/toi-5007-b/.
External links
- NASA Exoplanet Catalog entry
- TOI-5007 system overview at the NASA Exoplanet Archive
- Planet TOI-5007 b on Exoplanet.eu
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