1 citations · 1 across the 4 of their papers we have counts for
6 papers
The X-ray nature of the LINER nuclear sources
I. Marquez, O. Gonzalez-Martin, J. Masegosa +2
The analysis of the X-ray data for a sample of 51 LINER nuclei with available X-ray Chandra imaging is reported. Our aim was to investigate the physical mechanisms which power LINE…
Imaging and Spectroscopy of the Planetary Nebula NGC 6778
Vicente Maestro, Martin A. Guerrero, Luis F. Miranda
We present narrow-band images and long-slit echelle spectra of the planetary nebula (PN) NGC 6778. The data show this PN as bipolar, with a very prominent low-excitation equatorial…
Multiple Point-Symmetric Ejections in IC 4634
Martin A. Guerrero, Luis F. Miranda, You-Hua Chu
We present a spatio-kinematical study of the planetary nebula (PN) IC 4634 which has experienced several episodes of point-symmetric ejections oriented at different directions. The…
X-ray Observations of Planetary Nebulae
M. A. Guerrero, Y. -H. Chu, R. A. Gruendl
Planetary nebulae (PNe) are an exciting addition to the zoo of X-ray sources. Recent Chandra and XMM-Newton observations have detected diffuse X-ray emission from shocked fast wind…
The Kinematics of Point-Symmetric Planetary Nebulae: Observational Evidence of Precessing Outflows
Martin A. Guerrero
The discovery of collimated outflows associated to point-symmetric features in Planetary Nebulae has proliferated in recent years. The systematic variation of radial velocity that…
X-rays from Planetary Nebulae
You-Hua Chu, Martin A. Guerrero, Robert A. Gruendl
Two sources of X-ray emission are expected from planetary nebulae: the hot central stars with K, and shocked fast stellar winds at temperatures of 10 K.…