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=9

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=<p>Similar 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 bias in our attempt to globally understand and characterize the PNe population. Major efforts have been made to find the <italic>missing PNe</italic>. In particular, the INT Photometric H<italic>α</italic> Survey (IPHAS) has, since its debut, provided a whelm of new (candidate) 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 <italic>IPHAS PNe</italic> 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, and distant) are indeed discovered, but the survey also allows the retrieval of “simply” overlooked PNe.</p>