New Young Planetary Nebulae in IPHAS

Abstract

We search for very small-diameter galactic planetary nebulae (PNe) representing the earliest phases of PN evolution. A recently published IPHAS catalogue of Ha-emitting stars provides a useful base for this study as all sources present in this catalogue must be of small angular diameter. The PN candidates are selected based on their location in two colour-colour diagrams: IPHAS (r' - Ha) vs. (r' - i'), and 2MASS (J - H) vs. (H - Ks). Spectroscopic follow-up has been carried out on a sample of candidates in order to confirm their nature. We present a total of 83 PN candidates. We were able to obtain spectra or find the classification from the literature for 35 candidates. Five of these objects are likely to be new PNe, including one large bipolar PN discovered serendipitously near an emission-line star. PN distances deduced from extinction-distance relations based on IPHAS field-star photometry are presented for the first time. These yield distance estimates for our objects in the range from 2 kpc to 6 kpc. From the data to hand, we conclude that four of the discovered objects are very probably young PNe.

18 pages, 15 figures

References in corpus (17)

• Preplanetary Nebulae: An HST Imaging Survey and a New Morphological Classification System
• The Population of the Galactic Plane as Seen by MSX
• A spectroscopic atlas of post-AGB stars and planetary nebulae selected from the IRAS Point Source Catalogue
• MASH-II: More Planetary Nebulae from the AAO/UKST HαSurvey
• The IPHAS Catalogue of Halpha Emission Line Sources in the Northern Galactic Plane
• Initial Data Release from the INT Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS)
• IPHAS and the symbiotic stars. I. Selection method and first discoveries
• High Spatial Resolution Galactic 3D Extinction Mapping with IPHAS
• Early-A stars from IPHAS, and their distribution in and around the Cyg OB2 association
• Echelle long-slit optical spectroscopy of evolved stars
• A disc in the heart of the Ant nebula
• A silicate disk in the heart of the Ant
• The "Principes de Asturias" nebula: a new quadrupolar planetary nebula from the IPHAS survey
• A HST study of the environment of the Herbig Ae/Be star LkHa 233 and its bipolar jet
• Evolution from AGB to planetary nebula in the MSX survey
• Hen 2-104: A close-up look at the Southern Crab
• Radio continuum properties of young planetary nebulae

Cited by in corpus (22)

• The VST Photometric Halpha Survey of the Southern Galactic Plane and Bulge (VPHAS+)
• The Hα surface brightness - radius relation: a robust statistical distance indicator for planetary nebulae
• The Second Data Release of the INT Photometric H-Alpha Survey of the Northern Galactic Plane (IPHAS DR2)
• Surveying the reach and maturity of machine learning and artificial intelligence in astronomy
• A catalogue of integrated H-alpha fluxes for 1,258 Galactic planetary nebulae
• Compact planetary nebulae: Improved IR diagnostic criteria based on classification tree modelling
• Discovery of planetary nebulae using predictive mid-infrared diagnostics
• UKIRT Widefield Infrared Survey for Fe${}^{+}$
• The Coordinated Radio and Infrared Survey for High-mass Star Formation. IV: A new radio selected sample of compact Galactic Planetary Nebulae
• Hunting for Extremely Faint Planetary Nebulae in the SDSS Spectroscopic Database
• Kn 26, a New Quadrupolar Planetary Nebula
• Discovery of new low-excitation planetary nebulae
• NSV 11749, an elder sibling of the born again stars V605 Aql and V4334 Sgr?
• Near-infrared photometry of Galactic planetary nebulae with the VVV Survey
• A new Planetary Nebula in the outer reaches of the Galaxy
• J-PLUS: Tools to identify compact planetary nebulae in the Javalambre and southern photometric local universe surveys
• H$\alpha$ fluxes and extinction distances for planetary nebulae in the IPHAS survey of the Northern Galactic Plane
• K 3-22: a D-type symbiotic star
• Mapping H$\alpha$-Excess Candidate Point Sources in the Southern Hemisphere Using S-PLUS Data
• Unveiling compact planetary nebulae: Broad-band survey analysis and LAMOST confirmation
• The nature of G52.381-0.849 and G56.240-0.345: young stellar objects associated with extended mid-infrared emission?
• MIRIS Paα Galactic Plane Survey. II. The Catalog of Paα Emission-line Sources