Academic Journal
Spectroscopic follow-up of a subset of the Gaia /IPHAS catalogue of Hα-excess sources
| العنوان: | Spectroscopic follow-up of a subset of the Gaia /IPHAS catalogue of Hα-excess sources |
|---|---|
| المؤلفون: | Fratta, M., Scaringi, S., Monguió, M., Pala, A.F., Drew, J.E., Knigge, C., Iłkiewicz, K.A., Gandhi, P. |
| سنة النشر: | 2022 |
| المجموعة: | University of Southampton: e-Prints Soton |
| الوصف: | State-of-the-art techniques to identify Hα emission-line sources in narrow-band photometric surveys consist of searching for Hα excess with reference to nearby objects in the sky (position-based selection). However, while this approach usually yields very few spurious detections, it may fail to select intrinsically faint and/or rare Hα-excess sources. In order to obtain a more complete representation of the heterogeneous emission-line populations, we recently developed a technique to find outliers relative to nearby objects in the colour–magnitude diagram (CMD-based selection). By combining position-based and CMD-based selections, we built an updated catalogue of Hα-excess candidates in the Northern Galactic Plane. Here, we present spectroscopic follow-up observations and classification of 114 objects from this catalogue that enables us to test our novel selection method. Out of the 70 spectroscopically confirmed Hα-emitters in our sample, 15 were identified only by the CMD-based selection, and would have been thus missed by the classic position-based technique. In addition, we explore the distribution of our spectroscopically confirmed emitters in the Gaia CMD. This information can support the classification of emission-line sources in large surveys such as the upcoming WEAVE and 4-m Multi-Object Spectroscopic Telescope , especially if augmented with the introduction of other colours. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | text |
| اللغة: | English |
| Relation: | https://eprints.soton.ac.uk/489425/1/stac3216.pdf; Fratta, M., Scaringi, S., Monguió, M., Pala, A.F., Drew, J.E., Knigge, C., Iłkiewicz, K.A. and Gandhi, P. (2022) Spectroscopic follow-up of a subset of the Gaia/IPHAS catalogue of Hα-excess sources. Monthly Notices Of The Royal Astronomical Society, 518 (3), 3301–3311. (doi:10.1093/mnras/stac3216 ). |
| الاتاحة: | https://eprints.soton.ac.uk/489425/ https://eprints.soton.ac.uk/489425/1/stac3216.pdf |
| Rights: | cc_by_4 |
| رقم الانضمام: | edsbas.5883EDC6 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |