Population-based identification of H{\alpha}-excess sources in the Gaia DR2 and IPHAS catalogues
| العنوان: | Population-based identification of H{\alpha}-excess sources in the Gaia DR2 and IPHAS catalogues |
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| المؤلفون: | Simone Scaringi, A. F. Pala, M. Fratta, J. M. C. Court, T. J. Maccarone, Poshak Gandhi, Janet E. Drew, Maria Monguió, K. Iłkiewicz, Christian Knigge, Boris T. Gänsicke |
| المساهمون: | Ministerio de Ciencia, Innovación y Universidades (España), Universidad de Barcelona |
| المصدر: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Digital.CSIC. Repositorio Institucional del CSIC instname Monthly Notices of the Royal Astronomical Society, 2021, Vol.505(1), pp.1135-1152 [Peer Reviewed Journal] |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Techiques: photometric, Stellar population, Hertzsprung-Russell and colour-magnitude, Extinction (astronomy), Física::Astronomia i astrofísica::Cosmologia i cosmogonia [Àrees temàtiques de la UPC], Astrophysics, 01 natural sciences, Stars--Classification, Be -Hertzsprung-Russell and colour magnitude, 0103 physical sciences, Partition (number theory), Cosmografia, 010303 astronomy & astrophysics, Novae, Selection (genetic algorithm), QB, Physics, Cataclysmic variables, emission-line [Stars], 010308 nuclear & particles physics, Stars: emission-line, Diagram, Astronomy and Astrophysics, Be, Galactic plane, Catalogues, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics, photometric [Techiques], Space and Planetary Science, Magnitude (astronomy), Galactic coordinate system, Emission-line |
| الوصف: | We present a catalogue of point-like H{\alpha}-excess sources in the Northern Galactic Plane. Our catalogue is created using a new technique that leverages astrometric and photomeric information from Gaia to select H{\alpha}-bright outliers in the INT Photometric H{\alpha} Survey of the Northern Galactic Plane (IPHAS), across the colour-absolute magnitude diagram. To mitigate the selection biases due to stellar population mixing and to extinction, the investigated objects are first partitioned with respect to their positions in the Gaia colour-absolute magnitude space, and in the Galactic coordinates space, respectively. The selection is then performed on both partition types independently. Two significance parameters are assigned to each target, one for each partition type. These represent a quantitative degree of confidence that the given source is a reliable H{\alpha}-excess candidate, with reference to the other objects in the corresponding partition. Our catalogue provides two flags for each source, both indicating the significance level of the H{\alpha}-excess. By analysing their intensity in the H{\alpha} narrow band, 28,496 objects out of 7,474,835 are identified as H{\alpha}-excess candidates with a significance higher than 3. The completeness fraction of the H{\alpha} outliers selection is between 3% and 5%. The suggested 5{\sigma} conservative cut yields a purity fraction of 81.9%. Comment: 20 pages, 23 figures |
| وصف الملف: | application/pdf; text; application/octet-stream |
| اللغة: | English |
| تدمد: | 1365-2966 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e474d9b5704b8497c741e375d8be5c19Test http://arxiv.org/abs/2105.00749Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....e474d9b5704b8497c741e375d8be5c19 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652966 |
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