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New planetary nebulae from IPHAS

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

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New planetary nebulae from IPHAS

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  1. New planetary nebulaefrom IPHAS Romano L.M. Corradi1,2 Antonio Mampaso2 &Kerttu Viironen2 1 Isaac Newton Group of Telescopes, La Palma 2 Instituto de Astrofisica de Canarias, Tenerife

  2. 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)

  3. The survey • IPHAS = the INT/WFC Photometric HSurvey of the Northern Galactic Plane • Area: all l in Northern Plane; –5o < b < +5o (1800 deg2) • 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 arcmin2, 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.

  4. 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: http://astro.ic.ac.uk/Research/Halpha/North/index.html • IPHAS overview: Drew et al. 2005, MNNRAS , in press

  5. 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)

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

  7. 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

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

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

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

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

  12. 1st PN discovered

  13. Automatic photometry: compact PNe IPHAS X052531.2+281946 anticentre Dgc=14-20 kpc! see poster by Mampaso et al.

  14. 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)

  15. A huge SN remnant: Sh 2-147 5o x 5o Ha-r

  16. Some extended candidate PNe produced by Anna Kovacevic & Albert Zijlstra

  17. 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

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