90 citations · 533 across the 30 of their papers we have counts for
9 papers · 1 filter
A survey of IRAS young stellar object candidates. Searching for large-scale Herbig-Haro objects
Rosario López, Angels Riera, Robert Estalella +1
Jets and outflows are associated with young stellar objects across the stellar mass spectrum, from brown dwarf protostars to massive, Ae/Be stars. Frequently, the jet morphology is…
HST STIS UV Spectroscopic Observations of the Protoplanetary Nebula Hen3-1475
Xuan Fang, Ana I. Gomez de Castro, Jesus A. Toala +1
We present UV spectra of the protoplanetary nebula (pPN) Hen3-1475 obtained with the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space Telescope (HST). Our deep…
Proper motions of the HH1 jet
A. C. Raga, B. Reipurth, A. Esquivel +9
We describe a new method for determining proper motions of extended objects, and a pipeline developed for the application of this method. We then apply this method to an analysis o…
Transverse velocity shifts in protostellar jets: rotation or velocity asymmetries?
Fabio De Colle, Adriano H. Cerqueira, Angels Riera
Observations of several protostellar jets show systematic differences in radial velocity transverse to the jet propagation direction, which have been interpreted as evidence of rot…
Hu1-2: a metal-poor bipolar planetary nebula with fast collimated outflows
Xuan Fang, Martin A. Guerrero, Luis F. Miranda +3
We present narrow-band optical and near-IR imaging and optical long-slit spectroscopic observations of Hu1-2, a Galactic planetary nebula (PN) with a pair of [N II]-bright, fast-mo…
The Emerging Planetary Nebula CRL 618 and its Unsettled Central Star(s)
B. Balick, A. Riera, A. Raga +2
We report deep long-slit emission-line spectra, the line flux ratios, and Doppler profile shapes of various bright optical lines. The low-ionization lines (primarily [N I], [O I],…
An asymmetric jet launching model for the protoplanetary nebula CRL 618
P. F. Velazquez, A. Riera, A. C. Raga +1
We propose an asymmetrical jet ejection mechanism in order to model the mirror symmetry observed in the lobe distribution of some protoplanetary nebulae (pPNe), such as the pPN CRL…
Radio and Optical Observations of DG Tau B
Luis F. Rodríguez, Sergio A. Dzib, Laurent Loinard +4
DG Tau B is a Class I young stellar source that drives the asymmetric HH 159 bipolar jet. At optical wavelengths it is obscured by circumstellar optically-thick material. Using VLA…
Shaping point- and mirror-symmetric proto-planetary nebulae by the orbital motion of the central binary system
Sinhue A. R. Haro-Corzo, Pablo F. Velazquez, Alejandro C. Raga +2
We present 3D hydrodynamical simulations of a jet launched from the secondary star of a binary system inside a proto-planetary nebula. The secondary star moves around the primary i…