Physical Structure of Planetary Nebulae. I. The Owl Nebula

2003 ◽  
Vol 125 (6) ◽  
pp. 3213-3221 ◽  
Author(s):  
Martn A. Guerrero ◽  
You-Hua Chu ◽  
Arturo Manchado ◽  
Karen B. Kwitter
Keyword(s):  
Planetary Nebulae ◽  
Physical Structure

scholarly journals Physical Structure of Planetary Nebulae. III. The Large and Evolved NGC 1360

2004 ◽  
Vol 128 (4) ◽  
pp. 1711-1715 ◽  
Author(s):  
Daniel B. Goldman ◽  
Martín A. Guerrero ◽  
You-Hua Chu ◽  
Robert A. Gruendl
Keyword(s):  
Planetary Nebulae ◽  
Physical Structure

scholarly journals The physical structure of planetary nebulae around sdO stars: Abell 36, DeHt 2, and RWT 152★

2014 ◽  
Vol 446 (1) ◽  
pp. 317-329 ◽  
Author(s):  
A. Aller ◽  
L. F. Miranda ◽  
L. Olguín ◽  
R. Vázquez ◽  
P. F. Guillén ◽  
...  
Keyword(s):  
Planetary Nebulae ◽  
Physical Structure

scholarly journals High-Resolution Spectroscopy of the Planetary Nebulae PM 1–242, PM 1–318 and PM 1–322

2010 ◽  
Vol 27 (2) ◽  
pp. 199-202 ◽  
Author(s):  
L. F. Miranda ◽  
R. Vázquez ◽  
M. A. Guerrero ◽  
C. B. Pereira ◽  
E. Iñiguez-Garín
Keyword(s):  
High Resolution ◽  
Planetary Nebula ◽  
Planetary Nebulae ◽  
Central Star ◽  
Brightness Distribution ◽  
Physical Structure ◽  
High Resolution Spectroscopy

AbstractWe have recently confirmed the planetary nebula (PN) nature of PM 1–242, PM 1–318 and PM 1–322. Here we present high-resolution long-slit spectra of these three PNe in order to analyze their internal kinematics and to investigate their physical structure. PM 1–242 is a tilted ring and not an elliptical PN as suggested by direct images. The object is probably related to ring-like PNe and shows an unusual pointsymmetric brightness distribution in the ring. PM 1–318 is a pole-on elliptical PN, instead of a circular one as suggested by direct images. PM 1–322 is spatially unresolved and its spectrum shows large differences between the forbidden lines and Hα profiles, with the latter showing a double-peaked profile and relatively extended wings (FWZI ~325 km s−1). These properties are found in other PNe that are suspected to host a symbiotic central star.

scholarly journals On the relationship between the H2 emission and the physical structure of planetary nebulae

2012 ◽  
Vol 429 (2) ◽  
pp. 973-986 ◽  
Author(s):  
R. A. Marquez-Lugo ◽  
G. Ramos-Larios ◽  
M. A. Guerrero ◽  
R. Vázquez
Keyword(s):  
Planetary Nebulae ◽  
Physical Structure ◽  
The Relationship

Physical Structure of Planetary Nebulae. II. NGC 7662

2004 ◽  
Vol 128 (4) ◽  
pp. 1705-1710 ◽  
Author(s):  
Martín A. Guerrero ◽  
Elizabeth G. Jaxon ◽  
You-Hua Chu
Keyword(s):  
Planetary Nebulae ◽  
Physical Structure ◽  
Ngc 7662

Preparation And elemental analysis of ancient fibers

1987 ◽  
Vol 45 ◽  
pp. 410-411
Author(s):  
Allen Angel ◽  
Kathryn A. Jakes
Keyword(s):  
Cross Sections ◽  
Physical Structure ◽  
Energy Dispersive ◽  
Archaeological Sites ◽  
X Ray ◽  
Long Term Storage ◽  
Backscattered Electron ◽  
Electron Imaging

Fabrics recovered from archaeological sites often are so badly degraded that fiber identification based on physical morphology is difficult. Although diagenetic changes may be viewed as destructive to factors necessary for the discernment of fiber information, changes occurring during any stage of a fiber's lifetime leave a record within the fiber's chemical and physical structure. These alterations may offer valuable clues to understanding the conditions of the fiber's growth, fiber preparation and fabric processing technology and conditions of burial or long term storage (1).Energy dispersive spectrometry has been reported to be suitable for determination of mordant treatment on historic fibers (2,3) and has been used to characterize metal wrapping of combination yarns (4,5). In this study, a technique is developed which provides fractured cross sections of fibers for x-ray analysis and elemental mapping. In addition, backscattered electron imaging (BSI) and energy dispersive x-ray microanalysis (EDS) are utilized to correlate elements to their distribution in fibers.

Planetary Nebulae Dust as Seen by Herschel

2015 ◽  
Vol 71-72 ◽  
pp. 299-300
Author(s):  
D. Ladjal ◽  
HerPlaNS Consortium
Keyword(s):  
Planetary Nebulae

A Radial Velocity and Light Curve Study of Pulsations and Binarity in Proto-Planetary Nebulae

2015 ◽  
Vol 71-72 ◽  
pp. 127-128
Author(s):  
B.J. Hrivnak ◽  
W. Lu ◽  
G. Van de Steene ◽  
H. Van Winckel ◽  
J. Sperauskas ◽  
...  
Keyword(s):  
Light Curve ◽  
Radial Velocity ◽  
Planetary Nebulae
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