Photometry and spectroscopy of the central star of the Trifid nebula

Details Photometry and spectroscopy of the central star of the Trifid nebula Photometry and spectroscopy of the central star of the Trifid nebula

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..134..129k&link_type=abstract

Astronomy and Astrophysics Supplement, v.134, p.129-133

Astronomy and Astrophysics

Astrophysics

12

Binaries: Visual, Stars: Early-Type, Stars: Hd 164492, Ism: Trifid Nebula

Scientific paper

UBV photometry of the central star of the Trifid nebula - HD 164492, which has so far been suspected of photometric as well as of radial velocity variability - is presented. The results of our photometry do not confirm any variability. Moreover, based on new high resolution CCD spectra any radial velocity variability can be discarded. Photometry of several other members of the multiple stellar system is included; according to this photometry, the system is a physical one. Equivalent widths for the main component of HD 164492 are given. Positions measured on CCD exposures are presented too. Based on observations collected at the European Southern Observatory, La Silla, Chile.

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