The authors present the results of narrow-band filter photometry of Periodic Comet Faye obtained from Estacion Astronomica "Dr. Carlos U. Cesco" of Felix...
Photoevaporating Flows from the Cometary Knots in the Helix Nebula (NGC 7293)
We explain the Hα emission of the cometary knots in the Helix Nebula (NGC 7293) with an analytical model that describes the emission of the head of the globules...
Photographic and CCD surface photometry of 33 early-type galaxies in the Virgo cluster
Detailed photographic mappings are presented for 33 early-type E and S0 galaxies in the Virgo cluster which are brighter than 14 mag. The mappings are based on...
Photoionization instability of the Fe K absorbing plasma in the neutron star transient AX J1745.6-2901
AX J1745.6-2901 is a low-mass X-ray binary with an accreting neutron star, showing clear evidence for highly ionized absorption. Strong ionized Fe Kα and Kβ...
Photoionization Models of NGC 2363 and Their Implications for the Ionizing Star Cluster
Using the photoionization code CLOUDY, we compute photoionization models for the giant extragalactic H II region NGC 2363 and compare them with optical...
We present spherically symmetric and plane-parallel photoionization models of NGC 346, an H II region in the Small Magellanic Cloud. The models are based on...
Photoionized Herbig-Haro Objects in the Orion Nebula through Deep High Spectral Resolution Spectroscopy. II. HH 204
We analyze the physical conditions, chemical composition, and other properties of the photoionized Herbig-Haro (HH) object HH 204 through Very Large Telescope...
Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy - I. HH 529 II and III
We present the analysis of physical conditions, chemical composition, and kinematic properties of two bow shocks - HH 529 II and HH 529 III - of the fully...
Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy - III. HH 514
We analyse the physical conditions and chemical composition of the photoionized Herbig-Haro object HH 514, which emerges from the protoplanetary disc (proplyd)...