47 citations · 119 across the 8 of their papers we have counts for
8 papers
Estimating the propagation of a uniformly accelerated jet
J. I. Castorena, A. C. Raga, A. Esquivel +4
We study the problem of a Herbig-Haro jet with a uniformly accelerating ejection velocity, travelling into a uniform environment. For the ejection density we consider two cases: a…
A "head/tail" plasmon model with a Hubble law velocity profile
A. C. Raga, A. Rodriguez-Gonzalez, L. Hernande-Martinez +2
We present a model of a hypersonic, collimated, "single pulse" outflow, produced by an event with an ejection velocity that first grows, reaches a peak, and then decreases again to…
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…
A catalog of planetary nebula candidates in the Sculptor spiral galaxy NGC 300
Miriam Pena, Jonnathan Reyes-Perez, Liliana Hernandez-Martinez +1
[OIII]5007 on-band off-band images, obtained with the VLT and FORS2 spectrograph in two zones (center and outskirts) of the spiral galaxy NGC300, are analyzed searching for emissio…
PNe as observational constraints in chemical evolution models for NGC 6822
Liliana Hernandez-Martinez, Leticia Carigi, Miriam Peña +1
Chemical evolution models are useful for understanding the formation and evolution of stars and galaxies. Model predictions will be more robust as more observational constraints ar…
Chemical behavior of the Dwarf Irregular Galaxy NGC 6822. Its PN and HII region abundances
Liliana Hernandez-Martinez, Miriam Peña, Leticia Carigi +1
We aim to derive the chemical behavior of a significant sample of PNe and HII regions in the irregular galaxy NGC 6822 The selected objects are distributed in different zones of th…
Emission line objects in NGC 6822. New Planetary Nebula candidates
Liliana Hernandez-Martinez, Miriam Pena
Images obtained with the CTIO 4-m telescope and the MOSAIC-2 wide field camera in [O III] 5007 and Hαon-band and off-band filters are analyzed to search for emission lines objects…
The Star Formation History of the Disk of the Starburst galaxy M82
Y. D. Mayya, A. Bressan, L. Carrasco +1
Spectroscopic, photometric and dynamical data of the inner 3 kpc part of the starburst galaxy M82 are analyzed in order to investigate the star formation history of the stellar dis…