Table 1
Stellar parameters of TYC 2187-512-1 and TZ Ari.
| Parameter | Value | Reference | |
|---|---|---|---|
| Name and identifiers | |||
| Name | TYC 2187-512-1 | TZ Ari | |
| Gliese | – | 83.1 | G69 |
| Karmn | J21221+229 | J02002+130 | AF15 |
| Coordinates and spectral type | |||
| α | 21:22:06.41 | 02:00:14.16 | Gaia EDR3 (a) |
| δ | +22:55:55.0 | +13:02:38.7 | Gaia EDR3 (a) |
| Sp. type | M1.0V | M5.0V | Le13 |
| – | M3.5: V | AF15 | |
| G [mag] | 9.7752 ± 0.0028 | 10.6811 ± 0.0029 | Gaia EDR3 |
| J [mag] | 7.400 ± 0.018 | 7.514 ± 0.017 | 2MASS |
| Parallax and kinematics | |||
| ϖ [mas] | 64.580 ± 0.021 | 223.732 ± 0.070 | Gaia EDR3 |
| d [pc] | 15.485 ± 0.005 | 4.470 ± 0.001 | Gaia EDR3 |
| µα cos δ [mas yr–1 ] | +108.77 ± 0.02 | +1096.46 ± 0.07 | Gaia EDR3 |
| µδ [mas yr−1] | + 117.79 ± 0.02 | −1771.53 ± 0.06 | Gaia EDR3 |
| γ [km s–1] | 5.353 ± 0.023 | −28.832 ± 0.025 | La20 |
| U [km s–1] | −9.91 | +13.77 | This work(b) |
| V [km s–1] | +7.73 | −51.14 | This work(b) |
| W [km s–1] | −1.69 | +3.54 | This work(b) |
| Gal. population | Thin disk | Thin disk | This work |
| Photospheric parameters | |||
| Teff [K] | 3734 ± 54 | 3154 ± 54 | Pa19 |
| log g [dex] | 4.68 ± 0.06 | 5.01 ± 0.06 | Pa19 |
| [Fe/H] [dex] | +0.08 ± 0.19 | −0.13 ± 0.19 | Pa19 |
| −0.18 ± 0.08 | −0.25 ± 0.14 | Ma21 | |
| υ sin i* [km s–1] | <2 | <2 | R18 |
| Physical parameters | |||
| M* [M⊙] | 0.498 ± 0.019 | 0.150 ± 0.010 | Schw19 |
| R* [R⊙] | 0.495 ± 0.014 | 0.164 ± 0.005 | Schw19 |
| L* [L⊙] | 0.0416 ± 0.0007 | 0.00254 ± 0.00002 | Schw19 |
| Activity and rotation | |||
| pEW′(Hα) [Å] | −0.032 ± 0.006 | −1.906 ± 0.025 | Schf19 (c) |
| SMWO | – | 15.8 | BS18 |
| – | 6.2 ± 1.5 | AD17 | |
 |
– | −4.16 | BS18 |
| – | −4.79 ± 0.42 | AD17 | |
| −4.847 ± 0.015 | −4.46 (d) | Pe21 | |
| Prot [d] | 41 ± 1.7 | – | DA19 |
| 40 ± 1 | 1.96 ± 0.02 | This work | |
Notes. (a)Gaia EDR3 coordinates are given in the ICRS at epoch J2016.0. (b)For the computation of U, V, and W, a correction for the gravitational redshift was applied to the observed radial velocity γ, see La20. (c)pEW′(Hα) is the pseudo-equivalent width of the line after subtraction of the spectrum of an inactive reference star.(d) Median value of time series tabulated by Pe21.
Reference. G69: Gliese (1969); AF15: Alonso-Floriano et al. (2015); Gaia EDR3: Gaia Collaboration (2021); Le13: Lépine et al. (2013); 2MASS: Skrutskie et al. (2006); La20: Lafarga et al. (2020); Pa19: Passegger et al. (2019); Ma21: Marfil et al. (2021); R18: Reiners et al. (2018); Schw19: Schweitzer et al. (2019); Schf19: Schöfer et al. (2019); BS18: Boro Saikia et al. (2018); AD17: Astudillo-Defru et al. (2017); Pe21: Perdelwitz et al. (2021); DA19: Diez Alonso et al. (2019).
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