Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (23) (Citation History)
· Refereed Citations to the Article
· Reads History
·
· Translate This Page
Title:
First observations of microspicules at 4.8 GHz at the solar limb in polar coronal holes
Authors:
Habbal, Shadia R.; Gonzalez, Raymond D.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AB(National Radio Astronomy Observatory, Charlottesville, VA)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 376, July 20, 1991, p. L25-L27. Smithsonian Institution-supported research. (ApJL Homepage)
Publication Date:
07/1991
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
Coronal Holes, Polar Regions, Solar Corona, Solar Limb, Solar Radio Emission, Spicules, Brightness Temperature, Radio Astronomy, Very Large Array (Vla)
DOI:
10.1086/186094
Bibliographic Code:
1991ApJ...376L..25H

Abstract

VLA observations at 4.8, 8.5, and 15 GHz have led to the detection of macrospicules in solar coronal holes. The limb was sharply defined at all three frequencies. The brightness temperatures obtained for the macrospicules lead to an empirical model in which a cool 8000-K core is surrounded by a thin, hotter sheath of 100,000-200,000 K; these features are virtually identical to those derived from EUV observations over 10 years ago. A pinching-off and ballooning is noted at the top of the macrospicules' magnetic structure which may lead to the escape of some of the plasma from the macrospicules' locations.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences


More Article Retrieval Options

HELP for Article Retrieval
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints