Spectropolarimetry and the physical structure of proto-planetary nebulae

Physical Structure of Planetary Nebulae. I. The Owl Nebula

The Astronomical Journal ◽

10.1086/375206 ◽

2003 ◽

Vol 125 (6) ◽

pp. 3213-3221 ◽

Cited By ~ 15

Author(s):

Martn A. Guerrero ◽

You-Hua Chu ◽

Arturo Manchado ◽

Karen B. Kwitter

Keyword(s):

Planetary Nebulae ◽

Physical Structure

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

The Astronomical Journal ◽

10.1086/424623 ◽

2004 ◽

Vol 128 (4) ◽

pp. 1711-1715 ◽

Cited By ~ 11

Author(s):

Daniel B. Goldman ◽

Martín A. Guerrero ◽

You-Hua Chu ◽

Robert A. Gruendl

Keyword(s):

Planetary Nebulae ◽

Physical Structure

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

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stu2106 ◽

2014 ◽

Vol 446 (1) ◽

pp. 317-329 ◽

Cited By ~ 18

Author(s):

A. Aller ◽

L. F. Miranda ◽

L. Olguín ◽

R. Vázquez ◽

P. F. Guillén ◽

...

Keyword(s):

Planetary Nebulae ◽

Physical Structure

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

Publications of the Astronomical Society of Australia ◽

10.1071/as09029 ◽

2010 ◽

Vol 27 (2) ◽

pp. 199-202 ◽

Cited By ~ 4

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.

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

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/sts381 ◽

2012 ◽

Vol 429 (2) ◽

pp. 973-986 ◽

Cited By ~ 16

Author(s):

R. A. Marquez-Lugo ◽

G. Ramos-Larios ◽

M. A. Guerrero ◽

R. Vázquez

Keyword(s):

Planetary Nebulae ◽

Physical Structure ◽

The Relationship

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Physical Structure of Planetary Nebulae. II. NGC 7662

The Astronomical Journal ◽

10.1086/423913 ◽

2004 ◽

Vol 128 (4) ◽

pp. 1705-1710 ◽

Cited By ~ 12

Author(s):

Martín A. Guerrero ◽

Elizabeth G. Jaxon ◽

You-Hua Chu

Keyword(s):

Planetary Nebulae ◽

Physical Structure ◽

Ngc 7662

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Preparation And elemental analysis of ancient fibers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100126846 ◽

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.

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