AUTHOR=Sabin Laurence , Toalá Jesús A. , Ramos-Larios Gerardo ,  Guerrero Martín A. 

TITLE=Exploitation of the IPHAS to Investigate Planetary Nebulae

JOURNAL=Frontiers in Astronomy and Space Sciences

VOLUME=Volume 9 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2022.897904

DOI=10.3389/fspas.2022.897904

ISSN=2296-987X

ABSTRACT=Similarly to other classes of astronomical objects, there is a large discrepancy between  the total count of theoretically predicted Planetary Nebulae (PNe) and the number of those actually observed. This discrepancy introduces a bias in our attempt to globally understand  and characterise the PN population. Major efforts have been made to find the missing PNe. In particular the INT Photometric Hα Survey (IPHAS) has, since its debut, provided a whelms of new
(candidates) PNe, some of which have been studied in depth using various methodologies such as deep imaging, and low- and high-resolution spectroscopy. Here we present the outcome of the  analysis of a first group of these well investigated IPHAS PNe with a focus on the extended ones. We show that in general the missing objects that were expected to be unveiled by the survey (low density, evolved, distant) are indeed discovered, but the survey also allows the retrieval of  “simply” overlooked PNe.