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NIR Spectroscopy of IRAS 16115-5044

  • David T.F. Weldrake (a1), Peter R. Wood (a1) and Griet C. Van de Steene (a2)

Extract

IRAS 16115-5044 has been identified as a possible post-AGB star on the basis of its position in the IRAS 2-colour diagram (van der Veen et al. 1989). A study by Van de Steene and Pottasch (1993) failed to detect any radio-continuum flux from the object, suggesting it is still in the pre-planetary nebula phase, that is, the central star is not yet hot enough to ionize the circumstellar shell.

The central star is bright in the infrared (K=4.9) but faint in the visible which we attribute to an optically thick circumstellar shell (J-K=2.61, van der Veen et al. 1989). Oudmaijer et al. (1995) obtained a K-band spectrum of lRAS 16115-5044 longward of 2.2 microns, and did not detect any discernable features.

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Copyright

References

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Oudmaijer, R.D., Waters, L.B.F.M., van der Veen, W.E.C.J., Geballe, T.R., 1995, A&A 299, 69
van der Veen, W.E.C.J., Habing, H.J., Geballe, T.R., 1989, A&A 226, 108
Van de Steene, G.C., Pottasch, S.R., 1993, A&A 274, 895

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