Studies of two Lynds bright nebulae - LBN 140. 77 - 1. 42, a remarkable thermal ridge, and LBN 139. 57 + 2. 70, a radio and infrared partial ring

Journal Article · Fri Dec 01 00:00:00 EST 1989 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115290· OSTI ID:7193737

Green, D A ^[1]

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1. Dominion Radio Astrophysical Observatory, Penticton (Canada)

Observations at 408 MHz of two extended features corresponding to objects in Lynds' (1965) catalog of bright nebulae are presented. These are LBN 140.77 - 1.42, which corresponds to a linear radio ridge roughly 2 deg in extent that is approximately perpendicular to the Galactic plane, and LBN 139.57 + 2.70, which shows a partial radio ring roughly 12 arcmin in radius. The radio emission from LBN 140.77 - 1.42 has a thermal spectrum, and it coincides with the western edge of a large spur that is evident in atomic hydrogen in the Perseus arm. Part of this spur is also evident in the infrared at all IRAS wavebands. Thus, LBN 140.77 - 1.42 appears to be a remarkably large-scale ionization front penetrating a large interstellar cloud. The nature of LBN 139.57 + 2.70 is not clear. 37 refs.

• OSTI ID: 7193737
• Journal Information: Astronomical Journal; (USA), Vol. 98; ISSN 0004-6256
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
NEBULAE
MORPHOLOGY
CATALOGS
EMISSION SPECTRA
H2 REGIONS
INFRARED SPECTRA
RADIO TELESCOPES
RADIOWAVE RADIATION
SATELLITES
SPECTROSCOPY
ANTENNAS
COSMIC RADIO SOURCES
DOCUMENT TYPES
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
RADIATIONS
RADIO EQUIPMENT
SPECTRA
TELESCOPES
640105* - Astrophysics & Cosmology- Galaxies