Table 1
Atmosphere parameters and Rb abundances (as derived using hydrostatic models) and other selected observational information.
| IRAS name | Teff (K) | log g | vexp(OH) (km s-1) | Period (days) | Lithium | [Rb/Fe]static | S/N at 7800 Å | |
|
|
||||||||
| 01085+3022 | 3000∗ | −0.5 | 13 | 560 | yes | 2.0 | 49 | |
| 04404−7427 | 3000 | −0.5 | 8 | 534 | ... | 1.3 | 68 | |
| 05027−2158 | 2800 | −0.5 | 8 | 368 | yes | 0.4 | 418 | |
| 05098−6422 | 3000 | −0.5 | 6 | 394 | no | 0.1 | 309 | |
| 05151+6312 | 3000 | −0.5 | 15 | ... | no | 2.1 | 161 | |
| 06300+6058 | 3000 | −0.5 | 12 | 440 | yes | 1.6 | 127 | |
| 07222−2005 | 3000 | −0.5 | 8 | 1200 | ... | 0.6 | 30 | |
| 09194−4518 | 3000 | −0.5 | 11 | ... | ... | 1.1 | 25 | |
| 10261−5055 | 3000 | −0.5 | 4 | 317 | no | <−1.0 | 595 | |
| 14266−4211 | 2900 | −0.5 | 9 | 389 | no | 0.9 | 106 | |
| 15193+3132 | 2800 | −0.5 | 3 | 360 | no | −0.3 | 266 | |
| 15576−1212 | 3000 | −0.5 | 10 | 415 | yes | 1.5 | 91 | |
| 16030−5156 | 3000 | −0.5 | 7-14 | 579 | yes | 1.3 | 86 | |
| 16037+4218 | 2900 | −0.5 | 4 | 360 | no | 0.6 | 115 | |
| 17034−1024 | 3300 | −0.5 | 3-9 | 346 | no | 0.2 | 189 | |
| 18429−1721 | 3000 | −0.5 | 7 | 481 | yes | 1.2 | 98 | |
| 19059−2219 | 3000 | −0.5 | 13 | 510 | ... | 2.3 | 32 | |
| 19426+4342 | 3000 | −0.5 | 9 | ... | ... | 1.0 | 19 | |
| 20052+0554 | 3000∗ | −0.5 | 16 | 450 | yes | 1.5 | 47 | |
| 20077−0625 | 3000 | −0.5 | 12 | 680 | ... | 1.3 | 19 | |
| 20343−3020 | 3000 | −0.5 | 8 | 349 | no | 0.9 | 76 | |
Notes. The stellar parameters, Rb abundances, OH expansion velocities, variability periods and presence of Li are collected from García-Hernández et al. (2006; 2007, and references therein). The asterisks indicate that the best fitting Teff in the ZrO 6474 Å spectral region is warmer (3300 K) than that around the Rb I 7800 Å line (García-Hernández et al. 2006, 2007). Two stars (IRAS 16030−5156 and IRAS 17034−1024) only display the blue-shifted 1612 MHz OH maser peak and we list the range of OH expansion velocities shown by other stars with similar variability periods (García-Hernández et al. 2007).
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