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Self-similar Champagne Flows in H II Regions
We consider the idealized expansion of an initially self-gravitating, static, singular, isothermal cloud core. For t ≥ 0, the gas is ionized and heated to a higher uniform temperature by the
The Triple Radio Continuum Source in Serpens: The Birth of a Herbig-Haro System?
VLA observations of the triple radio continuum source in Serpens have revealed its extraordinary characteristics. While it is associated with a star-forming region, its outer components exhibit
The Hot, Diffuse Gas in a Dense Cluster of Massive Stars
We present an analytic model describing the cluster wind flow that results from the multiple interaction of the stellar winds produced by the stars of a dense cluster of massive stars. The analytic
Observations of Water Masers and Radio Continuum Emission in AFGL 2591
We report results of continuum (1.3 and 3.6 cm) and H2O maser line high angular resolution observations, made with the Very Large Array (VLA) in the A configuration, toward the star-forming region
Large proper motions in the jet of the high-mass YSO Cepheus A HW2
Using high angular resolution (~025-005) Very Large Array (VLA) observations made at 3.6 cm, 1.3 cm, and 7 mm during the period 1991-2004, we report the detection of large proper motions in the
Radio Continuum from the Powering Sources of the RNO 43, Haro 4-255 FIR, B335, and PV Cephei Outflows and from the Herbig-Haro Object 32A
A sensitive VLA search for 3.6 cm continuum emission from the central regions of eight outflows is reported. Continuum sources in RNO 43, Haro 4-255 FIR, B335, and PV Cephei are detected, that are
The Exciting Source of the Bipolar Outflow in L1448
A fast (+ or - 70 km/s), highly collimated CO bipolar outflow has been recently detected in the L1448 molecular cloud. No optical or infrared object has been found near the center of the outflow,
Mixing layers in stellar outflows
It has been suggested in the past that at least part of the emission observed in high-velocity outflows from young stars could be formed in turbulent mixing layers. A simplified mixing layer model
A fourth planet orbiting υ Andromedae
We present a 4-planet Keplerian fit for the radial velocity curve of the F8V star υ Andromeda, indicating the presence of a fourth planet in the system. We detect an additional fifth coherent signal