Reduce, reuse, recycle: Planetary nebulae as green galactic citizens

Recycle, Reduce, Reuse

Reduce, reuse, recycle scientific reviews.

4 Giles, J. (2007) PR’s ‘pit bull’ takes on open access. Nature 347, 445 5 Lexchin, J. and Light, D.W. (2006) Commercial influence and the content of medical journals. BMJ 332, 1444–1447 6 UK House of Commons, Science and Technology Committee (2011) Peer Review in Scientific Publications. Eighth Report of Session 2010–1, The Stationery Office 7 Smith, R. (2006) Peer review: a flawed process at ...

Radial velocities of planetary nebulae towards the Galactic bulge

Accurate radial velocities for a sample of 71 planetary nebulae, mostly located in the direction of the Galactic Centre, are presented. Most of the nebulae discussed in this paper are likely members of the Galactic bulge, based on their radial velocity, longitude and derived distance. The data give a large improvement over existing catalogues, doubling the sample of bulge planetary nebulae with...

Chemical abundances of planetary nebulae towards the galactic anticenter

In this paper we report new observations and derive chemical abundances for a sample of 26 planetary nebulae (PN) located in the anticenter direction. Most of these nebulae are far away objects, located at galactocentric distances greater than about 8 kpc, so that they are particularly useful for the determination of the radial gradients at large distances from the galactic center. A comparison...

Observations of planetary nebulae in the Galactic Bulge

High quality spectrophotometric observations of 30 Planetary Nebulae in the Galactic Bulge have been made. Accurate reddenings, plasma parameters, and abundances of He, O, N, S, Ar, Cl are derived. We find the abundances of O, S, Ar in the Planetary Nebulae in the Galactic Bulge to be comparable with the abundances of the Planetary Nebulae in the Disk, high abundances being maybe slightly more ...