Optical Slitless Spectroscopy of Large Magellanic Cloud Planetary Nebulae: a Study of the Emission Lines and Morphology

Content Provider	Semantic Scholar
Author	Stanghellini, Letizia Shaw, Richard A. Palen, Stacy
Copyright Year	2002
Abstract	Hubble Space Telescope Space Telescope Imaging Spectrograph slitless spectroscopy of LMC planetary nebulae (PNs) is the ideal tool to study their morphology and their ionization structures at once. We present the results from a group of 29 PNs that have been spatially resolved, for the first time, in all the major optical lines. Images in the light of H , [N ii], and [O iii] are presented, together with line intensities, measured from the extracted oneand two-dimensional spectra. A study on the surface brightness in the different optical lines, the electron densities, the ionized masses, the excitation classes, and the extinction follows, illustrating an ideal consistence with the previous results found by us on LMC PNs. In particular, we find the surface brightness decline with the photometric radius to be the same in most emission lines. We find that asymmetric PNs form a well-defined cooling sequence in the excitation–surface brightness plane, confirming their different origin and larger progenitor mass. Subject headings:Magellanic Clouds — planetary nebulae: general — stars: AGB and post-AGB — stars: evolution
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://archive.stsci.edu/hst/mcpn/papers/ApJ_2002_575.pdf
Language	English
Access Restriction	Open
Subject Keyword	CCL16 gene Class Computer cooling Cool - action Electron Excitation Extraction Large Little man computer Magellanic Catalogue of Stars Mathematical morphology Medical Subject Headings Peripheral Nervous System Neoplasms Photometry Planetary scanner Stars, Celestial Tag cloud brightness density
Content Type	Text
Resource Type	Article