Table 2
Stellar sample and water maser detections.
| Star | Magnitude (a) | L* | T* | Distance (b) | Water masers detected in this work | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Type | variation | Period | (L⊙) | (K) | (pc) | 437 | 439 | 471 | 474 | |
| range (ΔV) | (days) | GHz | GHz | GHz | GHz | |||||
| VX Sgr | RSG | 7.5 | 732 | 1.0 × 105 | 3500 | 1600 | Y | Y | Y | Y |
| U Her | Mira | 7.0 | 404 | 4.4 × 103 | 2700 | 266 | Y | Y | Y | Y |
| RR Aql | Mira | 6.7 | 395 | 7.3 × 103 | 2500 | 633 | Y | N | N | N |
| W Hya | Mira | 4.0 | 390 | 4.5 × 103 | 3100 | 104 | Y | Y | Y | Y |
| R Hya | Mira | 7.4 | 380 | 7.4 × 103 | 2100 | 124 | N | N | N | N |
| RS Vir | Mira | 7.6 | 354 | 4.4 × 103 | 2900 | 610 | Y | Y | (Y) | Y |
| R Leo | Mira | 6.9 | 310 | 2.5 × 103 | 2000 | 95 | N | N | N | N |
| R Aql | Mira | 6.5 | 270 | 4.4 × 103 | 2700 | 422 | Y | Y | Y | N |
| R Dor | SRb | 1.5 | 172 | 6.5 × 103 | 2400 | 59 | N | N | (Y) | N |
| R Crt | SRb | ... | 160 | 2.1 × 104 | 2800 | 261 | N | N | N | N |
| RT Vir | SRb | 1.6 | 158 | 4.0 × 103 | 2800 | 226 | N | N | N | N |
Notes. (a)Information from the AAVSO. (b)The distance references are: Chen et al. (2007, VX Sgr), Vlemmings & van Langevelde (2007, RR Aql and U Her), Whitelock et al. (2008, RS Vir), Haniff et al. (1995, R Leo), Knapp et al. (2003, R Dor), van Leeuwen (2007, R Crt, R Aql, R Hya, and WHya), Zhang et al. (2017, RT Vir).
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