R. Bachiller

High resolution near-infrared spectro-imaging of NGC 7027

We present near-infrared spectro-imaging of the young planetary nebula NGCxa07027 betweenxa02.10 andxa02.20xa0 μ m with high spatial (0.5″) and high spectral (

The history of mass dispersal around Herbig Ae/Be stars

rm 8.7 , km , s^{-1}

Dust emission from young outflows: The case of L 1157

) resolution. The observations, made using BEAR at the CFHT, reveal the detailed morphology and kinematics of the ionized nebula (in the Br γ line and 16 other atomic lines) and the surrounding molecular envelope (in the 1–0xa0S(1) line of H 2 ). The observations show that the ionized gas forms an elongated (

High resolution millimeter imaging of the proto-planetary nebula He 3-1475

{sim} 6 arcsectimes 12arcsec

The Spatio-Kinematic Structure of the CO Envelopes in Evolved Planetary Nebulae

,

SiO emission as a tracer of shocked gas in molecular outflows

{rm PA} = 32degr

The chemical evolution of planetary nebulae

), limb-brightened shell with an expansion velocity ofxa019.5xa0u2000along the line of sight. The shell is composed of numerous small condensations and has nearly parallel sides with flattened ends that are not well matched by a uniform ellipsoidal model. Low level Br γ emission is detected at high red- and blue-shifted velocities (

A chemical study of the photodissociation region NGC 7023

pm 55

Proto-planetary nebulae: the case of CRL 618

xa0) along a bipolar axis at

High-velocity molecular jets and bullets from IRAS 03282+3035

{rm PA} = 60degr