New planetary nebulae from IPHAS Romano L.M. Corradi 1,2 Antonio Mampaso 2 & Kerttu Viironen 2 1 Isaac Newton Group of Telescopes, La Palma 2 Instituto de Astrofisica de Canarias, Tenerife

The collaboration ING, La Palma: Corradi, Evans, Greimel, Leisy, Lennon, Skillen UK: Barlow (UCL), Drew (PI), Unruh (Imperial), Gaensicke (Warwick), Irwin (IoA), Knigge (Southampton), Masheder, Morris, Phillipps (Bristol), Walton (IoA), Zijlstra (Manchester) Spain: Mampaso, Martin (IAC), Zurita (Granada) The Netherlands: Groot (Nijmegen) USA: Drake, Sokoloski & Steeghs (CfA) Australia: Parker (AAO/Macquarie)

The survey IPHAS = the INT/WFC Photometric H  Survey of the Northern Galactic Plane Area: all l in Northern Plane; –5 o < b < +5 o (1800 deg 2 ) Mag. limit: to match UKST southern Ha survey (r ~ 20) Observations: 2.5m Isaac Newton Telescope (La Palma) + Wide Field Camera (4-CCD mosaic, fov 34x34 arcmin 2, 0”.33 pix -1 ) Ha (120 sec), Sloan r (30 sec) and i (10 sec) at two closely overlapped pointings per field 22 clear weeks needed to complete. Started on Aug 2003.

The survey Analysis: Pipeline reduction and point-source photometric and astrometric catalogue generation by CASU. IPHAS data are available immediately to astronomers from UK, Spain and the Netherlands, and to ALL astronomers after 1 year from the date of observing. IPHAS web page: IPHAS overview: Drew et al. 2005, MNNRAS, in press

Scope of the survey Search and counts of all classes of Ha emitting stars/nebulae  short-lived but critical (birth, death, binarity, …) stages of stellar evolution: supergiants, LBVs, pre- MS, WR, Be stars, interacting binaries, PNe, HII regions, SNRs… Study of Galactic disc structure (stellar populations, reddening)

Status of the survey done/attempted Complete by the end of 2006 to do

Expected products of the survey Photometric catalogue of 80 million objects Detection of ~50000 Ha-emitting objects ~700 new PNe ( IPHASX JHHMMSS.s+DDMMSS ) complements the AAO/UKST Southern Survey see Parker’s talk

IPHAS and the Planetary Nebulae Searching techniques: 1.photometric catalogue  compact/small nebulae 2. Visual inspection of mosaics  medium/large nebulae

Pickles (1998) library of stellar spectra Automatic photometry: the IPHAS colour-colour diagram r-i r-Ha Drew et al. 2005

…and can explore effects of progressive dust reddening: lower limit for normal stars Automatic photometry: the IPHAS colour-colour diagram Ha EW Validated by multi-object fibre spectroscopy (6.5mMMT and 4.2mWHT) E(B-V)= Drew et al. 2005

Automatic photometry: compact PNe 66 candidates selected so far (follow-up spectroscopy in course) r-i r-Ha

1 st PN discovered

Automatic photometry: compact PNe see poster by Mampaso et al. IPHAS X anticentre D gc =14-20 kpc!

Looking at the images: large nebulae Mosaics of Ha-r images at different CCD pixel binning values Visual inspection by several people: ~20 candidates selected so far (but area analysed is very small)

A huge SN remnant: Sh o x 5 o Ha-r

produced by Anna Kovacevic & Albert Zijlstra Some extended candidate PNe

Conclusions IPHAS, a new resource to detect PNe and Ha- emitting objects in the Galactic plane compact (young and/or faraway) PNe large (evolved) and low-surface brightness PNe