VLA observations of ammonia and continuum in regions with High-velocity gaseous outflows

Journal Article · Tue Jan 15 04:00:00 EST 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/162825· OSTI ID:5903312

Torrelles, J M; Ho, P T.P.; Rodriguez, L F; Canto, J

We present VLA observations of the (1,1) inversion transition of NH/sub 3/ in seven regions with high-velocity gaseous outflows. Small (< or approx. =0.1 pc) condensations were detected in L1551, S140, and Cepheus A. The condensation in L1551 is displaced by approx.28'' from IRS 5, the suspected source of energy of the region, while that observed in S140 seems to be the core of the more extended NH/sub 3/ source observed with a single dish. Three individual condensations were detected in Cepheus A, one of them with a remarkably elongated shape. These condensations may play an important role in focusing the bipolar outflow in the region. A comparison of the VLA ammonia and continuum maps suggests that many of the continuum knots seen in Cepheus A may be bright rims excited by two central stars.

• Research Organization: Harvard-Smithsonian Center for Astrophysics
• OSTI ID: 5903312
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 288:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics &amp; Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMMONIA
COSMIC GASES
COSMIC RADIO SOURCES
EMISSION
ENERGY-LEVEL TRANSITIONS
FLUIDS
GASES
HYDRIDES
HYDROGEN COMPOUNDS
INTERFEROMETRY
INTERSTELLAR GRAINS
MAPS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
PARTICLES
STELLAR ACTIVITY
STELLAR WINDS