The Accretion Dicsc in Halfa with OmegaCAM (ADHOC) Survey
| Autor: | Beccari, Giacomo, Petr-Gotzens, Monika G., Boffin, Henri M. J., Jerabkova, Tereza, Romaniello, Martino, Areal, María Belén, Carraro, Giovanni, Celis, Mariela, De Marchi, Guido De, De Wit, Willem-Jan, Drew, Janet E., Fedele, Davide, Ferrero, Leticia V., Kalari, Venu M., Manara, Carlo F., Mardones, Diego, Martin, Eduardo L., Meza, Erick, Mieske, Steffen, Panagia, Nino, Testi, Leonardo, Vink, Jorick S., Walsh, Jeremy R., Wright, Nick J. |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
OMEGACAM
Astrophysics::High Energy Astrophysical Phenomena Ciencias Físicas STAR-FORMING REGION Astrophysics::Cosmology and Extragalactic Astrophysics purl.org/becyt/ford/1.3 [https] Astronomía purl.org/becyt/ford/1 [https] Astrophysics::Solar and Stellar Astrophysics PHOTOMETRY Astrophysics::Earth and Planetary Astrophysics ACCRETION DISC Astrophysics::Galaxy Astrophysics CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | We present the first results of the Accretion Discs in Hα with OmegaCAM (ADHOC) survey, which aims to perform a deep and homogeneous photometric study of pre-main sequence (PMS) stars in a number of nearby star-forming regions. We took advantage of the exquisite image quality and wide-field capabilities of OmegaCAM at the VLT Survey Telescope (VST) to perform multi-band (ugri and Hα), deep (iSDSS < 22 mag), homogeneous and wide-field (covering tens of parsecs) observations of eight star-forming regions: the Orion Nebula Cluster, Lupus, Sco-Cen, Haffner 18, Vela OB2, Eta Cha, Chamaeleon and Ophiuchus. Using a robust method to identify PMS stars through their photometric excess in the Hα band, we aim to measure physical parameters (including mass accretion rates) for over 10 000 PMS stars. Direct comparison with low-resolution spectroscopy confirms that the objects with Hα excess emission that are detected photometrically are bona-fide PMS stars. The first results from this study clearly demonstrate the validity of the observational approach to unveiling complex stellar populations in young clusters. Published in The Messenger vol. 173, pp. 17-21, September 2018. |
| Databáze: | OpenAIRE |
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