Faint Halos around Compact Planetary Nebulae

Details Faint Halos around Compact Planetary Nebulae Faint Halos around Compact Planetary Nebulae

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as..101..541h&link_type=abstract

Astronomy and Astrophysics Supplement, Vol.101, NO. 3/NOVI, P. 541, 1993

Astronomy and Astrophysics

Astrophysics

5

Planetary Nebulae: General

Scientific paper

New monochromatic observations are reported for some compact planetary nebulae (PNs) having catalogued diameters of about , and which were carried out through narrow-band interference filters, with the photon counting camera in the direct imaging mode at the f/36 focus of the Canada-Franc&Hawaii 3.60 meter telescope. Two objects of larger diameters, He 1-5 (around FG Sge) and M 2-9, were also imaged through 10 Å wide filters (Hα and [NII]6583) at the f/25 focus of the Pic-du-Midi Bernard Lyot telescope using the RCA CCD detector. Absolute fluxes in emission lines are measured for the whole nebular extensions detected, and ionized masses tentatively computed using the present values of the radii measured on the Hα frames.

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