G70. 68 + 1. 2 - a pre-main-sequence star with a bright optical and radio emission shell

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/185307· OSTI ID:6535310

Becker, R H; Fesen, R A

CCD optical spectra and interference filter images of the Galactic radio source G70.68 + 1.2 are presented. These data show it to consist of a bright, shock-excited emission shell surrounding an H-alpha emission star having properties like those observed in some pre-main-sequence stars. The emission shell's eastern rim closest to this star is dominated by a reflection nebula. The optical spectra of the shell, and of two faint emission knots located 20 arcsec to the southwest, show relative line intensities similar to those seen in Herbig-Haro objects. Based on these optical data along with published infrared and radio data, it is found that G70.68 + 1.2 is not a young SNR or compact H II region as has been proposed, but instead, it is suggested that it is a massive pre-main-sequence star having associated optical nebulosity and an exceptionally strong radio flux. 25 references.

• Research Organization: California Univ., Davis (USA); Lawrence Livermore National Lab., CA (USA); Colorado Univ., Boulder (USA)
• OSTI ID: 6535310
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 334; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
EMISSION
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
FORBIDDEN TRANSITIONS
GALAXIES
IMAGES
MILKY WAY
MORPHOLOGY
PROTOSTARS
RADIATIONS
RADIOWAVE RADIATION
SPECTRA
STARS
VISIBLE SPECTRA