Table 1
Stellar parameters of GJ 806.
| Parameter | Value | Reference |
|---|---|---|
| Basic identifiers and data | ||
| GJ | 806 | Gli69 |
| BD | +44 3567 | Arg1903 |
| Karmn | J20450+444 | AF15, Cab16a |
| TOI | 4481 | ExoFOP-TESS |
| TIC | 239332587 | Sta18 |
| Sp. type | M1.5V | PMSU |
| T [mag] | 8.7276 ± 0.0073 | ExoFOP-TESS(a) |
| Astrometry and kinematics | ||
| α (J2016.0) | 20:45:04.10 | Gaia EDR3 |
| δ (J2016.0) | +44:29:56.6 | Gaia EDR3 |
| µα cos δ [mas yr−1] | +434.028 ± 0.018 | Gaia EDR3 |
| µδ [mas yr−1] | +271.022 ± 0.020 | Gaia EDR3 |
| ϖ [mas] | 82.890 ± 0.017 | Gaia EDR3 |
| d [pc] | 12.0641 ± 0.0024 | Gaia EDR3 |
| γ [km s−1] | −24.694 ± 0.0023 | Sou18 |
 |
+0.07250 ± 0.00035 | This work |
| U [km s−1] | −29.9631 ± 0.0041 | This work |
| V [km s−1] | −21.5366 ± 0.0023 | This work |
| W [km s−1] | −10.2250 ± 0.0045 | This work |
| Galactic population | Young disc | This work |
| Fundamental parameters | ||
| L★ [10−6 L⊙] | 25985 ± 98 | This work |
| Teff [K] | 3600 ± 16 | Mar21 |
| log gspec | 4.98 ± 0.12 | Mar21 |
| [Fe/H] | −0.28 ± 0.07 | Mar21 |
| R★ [R⊙] | 0.4144 ± 0.0038 | This work |
| M★ [M⊙] | 0.413 ± 0.011 | This work |
| Activity and age | ||
| υ sin i★ [km s−1] | <2.0 | Rei18, Mar21 |
| Prot,phot [d] | 34.6–48.1 | This work(d) |
| pEW(HeID3) [Å] | −0.019 ± 0.010 | Fuh20 |
| pEW(Hα) [Å] | +0.311 ± 0.012 | Fuh20 |
| pEW(CaII IRT1) [Å] | +0.742 ± 0.009 | Fuh20 |
| pEW(HeI IR) [Å] | +0.132 ± 0.009 | Fuh20 |
| log R′HK |  |
This work(c) |
| 〈B〉 [G] | 170 ± 60 | Rei22 |
| log LCa/Lbol | −4.92 | Rei22 |
| Age [Gyr] | 1–8 | This work(d) |
Notes. (a)See Table A.1 for multi-band photometry different from TESS T. (b)See Sect. 3.3 for the Prot determination from ground photometry. (c)From data compiled by Perdelwitz et al. (2021). (d)Passegger et al. (2019) assumed a mean age of 0.6 Gyr.
References. AF15: Alonso-Floriano et al. (2015); Arg1903: Argelander (1903); Cab16a: Caballero et al. (2016); ExoFOP-TESS: https://exofop.ipac.caltech.edu/tess/; Fuh20: Fuhrmeister et al. (2020); Gaia EDR3: Gaia Collaboration (2021); Gli69: Gliese (1969); Lin21: Lindegren et al. (2021); Mar21: Marfil et al. (2021); PMSU: Reid et al. (1995); Rei18: Reiners et al. (2018); Rei22: Reiners et al. (2022); Sou18: Soubiran et al. (2018).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.