Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...196..227a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 196, no. 1-2, May 1988, p. 227-232.
Astronomy and Astrophysics
Astrophysics
24
Infrared Radiation, Morphology, Planetary Nebulae, Protoplanets, Infrared Imagery, Interstellar Matter, Reflection Nebulae, Spatial Resolution
Scientific paper
The first high spatial resolution IR images of the protoplanetary nebula M2-9 are presented. Observations, made with the new UKIRT 2D infrared array camera, IRCAM, at J, H, and K, show the changing morphology of M2-9 with deeper looks into the infrared. At the shorter infrared wavelengths the knots, visible in earlier optical CCD observations, are seen predominantly on the east side of the nebula. Photometry at K shows the nebula to a limiting magnitude of about 18th/square arcsecond, where it is considerably more uniform in appearance than at shorter wavelengths. J and H photometry calibrated using earlier aperture measurements have allowed the formation of (J-K) and (H-K) color images. These show a predominant disk-like structure 20 arcsec in size stretching across the core region of M2-9. The reddening in the disk peaks at over 6 mag in (J-K) in two locations symmetrically placed east and west of the intensity peak.
Aspin Colin
McLean Ian S.
Smith Malcolm G.
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