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Infrared spectra and circumstellar emission of late-type stars
NIR photometry has been carried out for 63 M-type stars in eightphotometric bands. Four bands were the usual J, H, K, and L bands ofbroad-band photometry, and the other four were defined with relativelynarrow filters at 3.1, 3.3, 3.4, and 3.7 microns to measure the strengthof a stellar H2O absortion band centered at about 2.7 microns. Theeffects of circumstellar emission due to silicate dust on the energyspectra of oxygen-rich stars are extracted on the basis of the presentdata and IRAS photometric data. Peculiar carbon stars which exhibit asilicatelike emission feature at 10 microns were searched for from about1800 carbon stars. Eleven new candidate carbon stars were found.
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Osservazione e dati astrometrici
| Costellazione: | Aquila |
| Ascensione retta: | 18h55m46.68s |
| Declinazione: | +00°20'41.9" |
| Magnitudine apparente: | 9.182 |
| Moto proprio RA: | -6.6 |
| Moto proprio Dec: | -0.6 |
| B-T magnitude: | 10.448 |
| V-T magnitude: | 9.287 |
Cataloghi e designazioni:
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