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The IPHAS catalogue of H alpha emission-line sources in the northern Galactic plane
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Witham, Andrew, Knigge, Christian, Drew, J. E., Greimel, R., Steeghs, D., Gaensicke, B. T., Groot, P. J. and Mampaso, A. (2008) The IPHAS catalogue of H alpha emission-line sources in the northern Galactic plane. Monthly Notices of the Royal Astronomical Society, Vol.384 (No.4). pp. 1277-1288. doi:10.1111/j.1365-2966.2007.12774.x ISSN 0035-8711.
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WRAP_Steeghs_Northern Galactic Plane_0712.0988v1.pdf - Accepted Version Download (1349Kb) | Preview |
Official URL: http://dx.doi.org/10.1111/j.1365-2966.2007.12774.x
Abstract
We present a catalogue of point-source H alpha emission-line objects selected from the INT/WFC Photometric Ha Survey (IPHAS) of the northern Galactic plane. The catalogue covers the magnitude range 13 <= r' <= 19.5 and includes Northern hemisphere sources in the Galactic latitude range -5 degrees < b < 5 degrees. It is derived from similar to 1500 deg(2) worth of imaging data, which represents 80 per cent of the final IPHAS survey area. The electronic version of the catalogue will be updated once the full survey data become available. In total, the present catalogue contains 4853 point sources that exhibit strong photometric evidence for Ha emission. We have so far analysed spectra for similar to 300 of these sources, confirming more than 95 per cent of them as genuine emission-line stars. A wide range of stellar populations are represented in the catalogue, including early-type emission-line stars, active late-type stars, interacting binaries, young stellar objects and compact nebulae.
The spatial distribution of catalogue objects shows overdensities near sites of recent or current star formation, as well as possible evidence for the warp of the Galactic plane. Photometrically, the incidence of Ha emission is bimodally distributed in (r' - i'). The blue peak is made up mostly of early-type emission-line stars, whereas the red peak may signal an increasing contribution from other objects, such as young/active low-mass stars. We have cross-matched our H alpha-excess catalogue against the emission-line star catalogue of Kohoutek & Wehmeyer, as well as against sources in SIMBAD. We find that fewer than 10 per cent of our sources can be matched to known objects of any type. Thus IPHAS is uncovering an order of magnitude more faint (r' > 13) emission-line objects than were previously known in the Milky Way.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Stars -- Catalogs | ||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||
Publisher: | Wiley | ||||
ISSN: | 0035-8711 | ||||
Official Date: | 11 March 2008 | ||||
Dates: |
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Volume: | Vol.384 | ||||
Number: | No.4 | ||||
Number of Pages: | 12 | ||||
Page Range: | pp. 1277-1288 | ||||
DOI: | 10.1111/j.1365-2966.2007.12774.x | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 14 December 2015 | ||||
Date of first compliant Open Access: | 14 December 2015 | ||||
Funder: | Particle Physics and Astronomy Research Council (Great Britain) (PPARC), Smithsonian Astrophysical Observatory, Science and Technology Facilities Council (Great Britain) (STFC), Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO) | ||||
Grant number: | 639.042.201 (NWO) | ||||
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