Table 2.
Adopted physical parameters for sdMs, esdMs, and usdMs from the comparison between the observed VLT/X-shooter spectra and the BT-Settl synthetic spectra from the fit of the overall SED.
| sdM |
esdM |
usdM |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SpT | RV | log g | Teff | [Fe/H] | Mass | RV | log g | Teff | [Fe/H] | Mass | RV | log g | Teff | [Fe/H] | Mass |
| km s−1 | dex | K | dex | M⊙ | km s−1 | dex | K | dex | M⊙ | km s−1 | dex | K | dex | M⊙ | |
| M0.0 | +122.6 | 4.5 | 3600 | −1.5 | 0.133 | −9.2 | 5.0 | 3800 | −1.0 | 0.275 | +122.6 | 4.5 | 3500 | −2.0 | 0.106 |
| M0.5 | −45.1 | 5.0 | 3700 | −1.0 | 0.216 | −97.3 | 5.0 | 3700 | −1.5 | 0.153 | −117.1 | 5.5 | 3700 | −2.5 | 0.125 |
| M1.0 | −33.7 | 5.0 | 3700 | −0.5 | 0.352 | −259.7 | 5.5 | 3800 | −0.5 | 0.421 | −15.9 | 5.5 | 3700 | −1.0 | 0.216 |
| M1.5 | −78.7 | 4.5 | 3600 | −0.0 | 0.600 | −46.7 | 5.0 | 3600 | −1.0 | 0.178 | – | – | – | – | – |
| M2.0 | −133.8 | 5.5 | 3600 | −0.5 | 0.272 | +40.6 | 5.5 | 3600 | −1.0 | 0.178 | – | – | – | – | – |
| M2.5 | −39.7 | 5.5 | 3600 | −0.5 | 0.272 | – | – | – | – | – | −138.8 | 5.5 | 3600 | −1.5 | 0.133 |
| M3.0 | −52.6 | 5.0 | 3500 | −0.0 | 0.450 | +35.3 | 5.5 | 3500 | −1.5 | 0.120 | +178.0 | 6.0 | 3800 | −0.5 | 0.421 |
| M3.5 | −21.7 | 5.0 | 3400 | −0.5 | 0.177 | −52.5 | 5.5 | 3500 | −1.5 | 0.120 | – | – | – | – | – |
| M4.0 | −67.2 | 5.0 | 3400 | −1.0 | 0.129 | −81.3 | 5.5 | 3400 | −1.5 | 0.110 | −19.8 | 4.5 | 3200 | −1.5 | 0.098 |
| M4.5 | −470.7 | 5.5 | 3300 | −1.0 | 0.117 | −60.7 | 5.5 | 3400 | −1.0 | 0.129 | −102.5 | 5.5 | 3400 | −2.0 | 0.100 |
| M5.0 | −31.6 | 5.0 | 3200 | −0.0 | 0.150 | +21.7 | 4.5 | 3200 | −1.5 | 0.098 | +180.0 | 5.5 | 3500 | −2.5 | 0.106 |
| M5.5 | −12.5 | 5.5 | 3200 | −1.0 | 0.107 | +318.1 | 5.5 | 3300 | −2.0 | 0.098 | −25.1 | 4.5 | 3300 | −2.0 | 0.098 |
| M6.0 | −87.8 | 5.5 | 3200 | −1.0 | 0.107 | −38.5 | 5.5 | 3300 | −2.0 | 0.098 | +104.8 | 5.5 | 3300 | −2.0 | 0.098 |
| M6.5 | −57.2 | 5.5 | 2900 | −0.0 | 0.063 | −3.7 | 5.5 | 3300 | −2.0 | 0.098 | – | – | – | – | – |
| M7.0 | – | 5.0 | 3000 | −1.0 (a) | 0.096 | −167.1 | 5.5 | 3200 | −0.0 | 0.096 | – | – | – | – | – |
| M7.5 | – | – | – | – | – | +191.1 | 5.0 | 3000 | −2.0 | 0.090 | +122.1 | 5.5 | 3100 | −2.5 | 0.092 |
| M8.0 | −208.9 | 5.5 | 2900 | −2.0 | 0.089 | – | – | – | – | – | – | – | – | – | – |
| M8.5 | – | – | – | – | – | +72.7 | 5.5 | 3000 | −2.0 | 0.090 | +85.0 | 5.5 | 3100 | −2.5 | 0.092 |
| M9.5 | +64.7 | 5.0 | 2800 | −2.0 | 0.088 | – | – | – | – | – | – | – | – | – | – |
Notes. For each spectral subtype and metal class, we list the radial velocities (RV in km s−1), gravity (log g), temperature (Teff in K), and metallicity ([Fe/H]). Uncertainties on the radial velocities, gravities, Teff, and metallicities are 15–25 km s−1, 0.5 dex, 100 K, and 0.25 dex, respectively. Uncertainty on mass from the Baraffe et al. (1997) models is approximately ±10%. No X-shooter spectrum is available for the subtype with missing values.
LHS 377 parameters are from Rajpurohit et al. (2016).
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