New planetary nebulae in the Galactic bulge

Details New planetary nebulae in the Galactic bulge New planetary nebulae in the Galactic bulge

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95..804k&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, March 1988, p. 804-820, 967, 968.

Astronomy and Astrophysics

Astronomy

58

Galactic Bulge, Galactic Nuclei, H Beta Line, H Ii Regions, Planetary Nebulae, Stellar Mass, Variable Stars, Emission Spectra, H Alpha Line, Infrared Astronomy Satellite, Line Spectra, Radial Velocity, Schmidt Telescopes

Scientific paper

Fifteen new planetary nebulae (PN) have been discovered in a 44 sq. deg field (α = 18h05m, δ = -28°.5, 1950) that includes the Sgr I and Sgr II fields and Baade's Window. The survey was made with both the 4°.5 and 10° objective prisms of the Curtis Schmidt using IIIa-J and IIIa-F emulsions, respectively. Absolute spectrophotometry, excitation classes, diameters, and radial velocities are given for these new PN. Radial velocities are also given for eight other bulge planetaries. An analysis of the available radial velocities of 147 PN with |b| < 5°.5 and |Δl| < 10° shows good evidence for a rotation of the galactic bulge. Ionized masses for the new PN are derived from the Hβ fluxes and diameters; it is deduced that the true range in these masses covers a factor of ≡50. Their upper limit is probably ≡0.3M_sun;; this is consistent with that expected for objects that have evolved from the most massive bulge stars. The consequences of observational selection in this survey are briefly discussed.

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