Table 2.
Reference stars for each spectral subtype.
| Spectral type | Teff (K) | Reference star | Prot (d) |
|---|---|---|---|
| M0.0 V | 3850 | J14257+236W | 111 ± 12 |
| M0.5 V | 3800 | J18580+059 | 35.2 ± 0.3 |
| M1.0 V | 3680 | J18051–030 | 127.8 ± 3.2a |
| M1.5 V | 3600 | J16254+543 | 100 ± 5 |
| M2.0 V | 3550 | J06103+821 | 44.6 ± 1.0 |
| M2.5 V | 3450 | J17198+417 | 71.5 ± 2.6 |
| M3.0 V | 3400 | J15194–077 | 132.5 ± 6.3a |
| M3.5 V | 3250 | J17578+046 | 130b |
| M4.0 V | 3200 | J11477+008 | 163 ± 3 |
| M4.5 V | 3100 | J19216+208 | 133.5 ± 8.9 |
| M5.0 V | 3050 | J03133+047 | 126.2c |
| M5.5 V | 3000 | J00067–075 | … |
| M6.0 V | 2800 | J07403–174 | … |
| M6.5 V | 2700 | … | … |
| M7.0 V | 2650 | … | … |
| M7.5 V | 2610 | … | … |
| M8.0 V | 2570 | … | … |
| M8.5 V | 2510 | … | … |
| M9.0 V | 2450 | … | … |
| M9.5 V | 2400 | … | … |
Notes. The same reference star is used for all spectral types later than M6.0 V. Effective temperature estimates are adopted from Pecaut & Mamajek (2013) and rotation periods from Díez Alonso et al. (2019) if not indicated otherwise.
References. (a) Suárez Mascareño et al. (2015); (b)Kiraga & Stepien (2007); (c)Newton et al. (2016).
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