New planetary nebulae from IPHAS

1
New planetary nebulaefrom 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

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 lt b lt 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.sDDMMSS)
• complements the AAO/UKST Southern Survey
  
• see Parkers 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
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 X052531.2281946 anticentre Dgc14-20 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