Ionizing the Diffuse Interstellar Medium in Late-type Galaxies
We show how the clumpy structure of the interstellar medium (ISM) both inside HII regions and in the diffuse component, permits the propagation of ionizing...
IPHAS Discovers Hundreds of New Planetary Nebulae at the Galactic Plane
The Isaac Newton Telescope H-alpha survey (IPHAS) of the northern galactic plane is near completion. The photometric (H-alpha, R, I) catalogue and the mosaic...
As the present study was progressing, we started a campaign of spectroscopic follow-up of the Hα emitters detected by IPHAS. Accordingly a dozen candidate...
IPHAS: Surveying the North Galactic Plane in H-alpha
H-alpha emission is ubiquitous in our Galaxy. It traces ionised gas of assorted nebulae such as HII regions, planetary nebulae, Wolf-Rayet nebulae, and...
IPHAS: The INT/WFC Photometric H-alpha Survey of the Northern Galactic Plane
H-alpha emission both traces diffuse ionised nebulae and is commonly prominent in the spectra of pre- and post-main-sequence stars and interacting binaries...
IPHASX J052531.2+281946: a new Planetary Nebula towards the Galactic Anticentre
A planetary nebula has been discovered in the course of the INT/WFC Photometric Hα Survey (IPHAS) of the northern galactic plane. It is located near the...
IR And X-ray Tests Of The Clumpy Torus Models Of AGN
On-going explorations of AGN based at mid-IR wavelengths has tightly constrained individual torus sizes to a few pc and found that spectral fitting in the N...