Table 2
Spectral lines for stars with and without far–IR excess.
| Star | Instr.a | Date | Distance | H α | C III | N III | Pf α | Hu α | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Paral. | Ca II | Sp/L | 6563 Å | 5596 Å | 4641 Å | 7.5 μm | EW | 12.3 μm | EW | |||
| (pc) | (10−17 W m−2) | (Å) | (10−17 W m−2) | (Å) | ||||||||
| Excess | ||||||||||||
| HD 24912 | GRANS | 19960826 | 725 | 500 | 640 | No | Yes | Yes | 69 ± 3.5 | 67 | 10.5 ± 0.8 | 58 |
| HD 64760 | UVES | 20090923 | 360 | 440 | 525 | Weak wings | No | No | 20 ± 2.7 | 37 | 3.9 ± 0.7 | 42 |
| HD 149404 | UVES | 20090308 | 1315 | 1865 | 1240 | Yes double | Yes | Yes | 242 ± 4.0 | 224 | 41 ± 1.0 | 176 |
| HD 149757 | HARPS | 20060310 | 112 | 230 | 240 | Weakb | No | No | <12.8 | – | <2.9 | – |
| HD 151804 | FEROS | 20040502 | 1640 | 1680 | 1365 | Yes + Hβ | Yes | Yes | 307 ± 3.3 | 473 | 39 ± 0.8 | 254 |
| HD 154368 | UVES | 20090306 | 1220 | 1290 | 1290 | Marginal | Yes | No | 39 ± 2.8 | 81 | 6.5 ± 0.7 | 72 |
| HD 165024 | FEROS | 20040706 | 280 | 440 | 350 | No | No | No | <11 | – | <2.6 | – |
| HD 188209 | BOES | 20050526 | 1490 | 1410 | 1270 | Yes | Yes | No | 9.7 ± 1.9 | 57 | 2.6 ± 0.5 | 84 |
| HD 190918b | BOES | 20070615 | 1960 | 2360 | 2290 | Yes | Yes | ? | 60 ± 2.9 | 274 | 9.4 ± 0.8 | 174 |
| HD 192639b | ELODIE | 20010811 | 2600 | 2080 | 2115 | Yes asym | Yes | Yes | 32 ± 1.9 | 221 | 3.0 ± 0.5 | 96 |
| HD 206773b | – | – | 960 | 550 | 595 | – | – | 41 ± 2.2 | 154 | 6.8 ± 0.6 | 117 | |
| HD 210839 | MAESTRO | 20040828 | 620 | 1250 | 1190 | Yes | Yes | Yes | 134 ± 3.2 | 187 | 19 ± 0.8 | 129 |
| No excess | ||||||||||||
| HD 34816 | Sandiford | 19930210 | 270 | 410 | 380 | No | No | ? | <7.2 | – | <1.6 | – |
| HD 36861 | UVES | 20040205 | 340 | 530 | 490 | No | Yes | Yes | 11.3 ± 3.4 | 16 | <2.4 | – |
| HD 38087 | UVES | 20050321 | 340 | 470 | 490 | No | ? | No | 5.9 ± 1.6 | 121 | <1.4 | – |
| HD 47839c | GRAMS | 19960405 | 280 | 710 | 665 | No | Yes | Yes | <6.3 | – | <1.7 | – |
| HD 53367 | UVES | 20091215 | – | 1000 | 780 | Yes | ? | Yes | 8.8 ± 0.8 | 39 | 1.1 ± 0.2 | 33 |
| HD 62542b | UVES | 20031113 | 390 | 450 | 530 | No | No | No | 0.14 ± 0.04 | 6 | 1.1 ± 0.2 | 33 |
| HD 65575b | – | – | 420 | 155 | 390 | – | – | – | <10.0 | – | <2.3 | – |
| HD 108639b | – | – | 1820 | 2380 | 2280 | – | – | – | 0.6 ± 0.1 | 16 | 0.19 ± 0.03 | 37 |
| HD 147933 | HARPS | 20070330 | 145 | – | 100 | No | No | No | <12.0 | – | <2.7 | – |
| HD 214680 | MAESTRO | 19660704 | 360 | 690 | 615 | No | No | No | <5.9 | – | <1.5 | – |
Notes. We list for the optical high resolution spectra the name of instrument and date of the observations. Distance estimates are from Gaia, Ca II and from the spectral and luminosity class (Sp/L). The presence of the H α, C III, and N III lines is flagged. For the Pfund α (n = 6 → 5) and Humphrey α (n = 7 → 6) hydrogen transitions observed with IRS we give the continuum subtracted line fluxes and equivalent width. (a) Optical high-resolution spectra of this instrument are made available at CDS. (b) Parallax from Gaia (DR2) by the Gaia Collaboration (2018). (c)Out of five spectra taken between 1993 and 2010 only the HARPS spectrum taken 2006-03-10 shows weak H α emission (Fig. 3).
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