304 citations · 1.5k across the 40 of their papers we have counts for
10 papers · 1 filter
Orientation effects in Bipolar nebulae
Hugo E. Schwarz, Hektor Monteiro, Ryan Peterson
We show that the inclination to the line of sight of bipolar nebulae strongly affects some of their observed properties. We model these objects as having a spherically symmetric Pl…
3-D Photoionization Structure and Distances of Planetary Nebulae III. NGC 6781
Hugo E. Schwarz, Hektor Monteiro
Continuing our series of papers on the three-dimensional (3-D) structures of and accurate distances to Planetary Nebulae (PNe), we present our study of the planetary nebula NGC6781…
Ages of White Dwarf-Red Subdwarf Systems
Hektor Monteiro, Wei-Chun Jao, Todd Henry +2
We provide the first age estimates for two recently discovered white dwarf-red subdwarf systems, LHS 193AB and LHS 300AB. These unusual systems provide a new opportunity for linkin…
3-D Photoionization Structure and Distances of Planetary Nebulae II. Menzel 1
Hektor Monteiro, Hugo E. Schwarz, Ruth Gruenwald +2
We present the results of a spatio-kinematic study of the planetary nebula Menzel 1 using spectro-photometric mapping and a 3-D photoionization code. We create several 2-D emission…
3-D Photoionization Structure and Distances of Planetary Nebulae I. NGC6369
Hektor Monteiro, Hugo E. Schwarz, Ruth Gruenwald +1
We present the results of mapping the planetary nebula NGC6369 using multiple long slit spectra taken with the CTIO 1.5m telescope. We create two dimensional emission line images f…
Proper Motion and Kinematics of the Ansae in NGC7009
Rodrigo Fernandez M., Hektor Monteiro, Hugo E. Schwarz
We have measured the proper motion (PM) and kinematics of the ansae in NGC 7009 using high dispersion echelle spectra and archive narrow band HST images. Assuming that the ansae ar…