التفاصيل البيبلوغرافية
| العنوان: |
Potential asteroid discoveries by the ESA Gaia mission : Results from follow-up observations |
| المؤلفون: |
Carry, B., Thuillot, W., Spoto, F., David, P., Berthier, J., Tanga, P., Mignard, F., Bouquillon, S., Mendez, R. A., Rivet, J. -P., Le Van Suu, A., Dell'Oro, A., Fedorets, G., Frezouls, B., Granvik, M., Guiraud, J., Muinonen, K., Panem, C., Pauwels, T., Roux, W., Walmsley, G., Petit, J. -M., Abe, L., Ayvazian, V., Baillié, K., Baransky, A., Bendjoya, P., Dennefeld, M., Desmars, J., Eggl, S., Godunova, V., Hestroffer, D., Inasaridze, R., Kashuba, V., Krugly, Y. N., Molotov, I. E., Robert, V., Simon, A., Sokolov, I., Souami, D., Tarady, V., Taris, F., Troianskyi, V., Vasylenko, V., Vernet, D. |
| المساهمون: |
Department of Physics, Planetary-system research, Particle Physics and Astrophysics |
| بيانات النشر: |
EDP sciences |
| سنة النشر: |
2021 |
| المجموعة: |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
| مصطلحات موضوعية: |
minor planets, asteroids: general, celestial mechanics, DATA RELEASE 1, SOLAR-SYSTEM OBJECTS, 115 Astronomy, Space science |
| الوصف: |
Context. Since July 2014, the Gaia mission of the European Space Agency has been surveying the entire sky down to magnitude 20.7 in the visible. In addition to the millions of daily observations of stars, thousands of Solar System objects (SSOs) are observed. By comparing their positions, as measured by Gaia, to those of known objects, a daily processing pipeline filters known objects from potential discoveries. However, owing to Gaia's specific observing mode, which follows a predetermined scanning law designed for stars as "fixed" objects on the celestial sphere, potential newly discovered moving objects are characterized by very few observations, which are acquired over a limited time. Furthermore, these objects cannot be specifically targeted by Gaia itself after their first detection. This aspect was recognized early on in the design of the Gaia data processing.Aims. A daily processing pipeline dedicated to these candidate discoveries was set up to release calls for observations to a network of ground-based telescopes. Their aim is to acquire follow-up astrometry and to characterize these objects.Methods. From the astrometry measured by Gaia, preliminary orbital solutions are determined, allowing us to predict the position of these potentially newly discovered objects in the sky while accounting for the large parallax between Gaia and the Earth (separated by 0.01 au). A specific task within the Gaia Data Processing and Analysis Consortium has been responsible for the distribution of requests for follow-up observations of potential Gaia SSO discoveries. Since late 2016, these calls for observations (nicknamed "alerts") have been published via a Web interface with a quasi-daily frequency, together with observing guides, which is freely available to anyone worldwide.Results. Between November 2016 and the end of the first year of the extended mission (July 2020), over 1700 alerts were published, leading to the successful recovery of more than 200 objects. Among them, six have a provisional designation assigned ... |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| العلاقة: |
We are indebted to the engineers of the European Space Agency and of the Data Processing Center CNES in Toulouse, France, who made possible this mission and these observations. We thank CNRS-INSU (France) and the scientific council of the Gaia observing service ANO1 for the yearly funding allowing us to observe periodically at Haute-Provence Observatory (OHP). We thank the referee J.J. Kavelaars for his comments. This work presents results from the European Space Agency (ESA) space mission Gaia. Gaia data are being processed by the Gaia Data Processing and Analysis Consortium (DPAC). Funding for the DPAC is provided by national institutions, in particular the institutions participating in the Gaia MultiLateral Agreement (MLA). The Gaia mission website is https://www.cosmos.esa.int/gaiaTest. The Gaia archive website is https://archives.esac.esa.int/gaiaTest. RAM acknowledges support from CONICYT/FONDECYT Grant No. 1190038 and from the Chilean Centro de Excelencia en Astrofisica y Tecnologia as Afines (CATA) BASAL PFB/06. We are grateful for the continuous support of the Chilean National Time Allocation Committee under programs CN2019A-3, CN2019B16, and CN2020A-20. We thank all the observers participating in this program. This work has financially been supported by Agenzia Spaziale Italiana (ASI) through contracts I/037/08/0, I/058/10/0, 2014-025-R.0. The observations at Abastumani were supported by the Shota Rustaveli National Science Foundation, Grant RF-18-1193.; Carry , B , Thuillot , W , Spoto , F , David , P , Berthier , J , Tanga , P , Mignard , F , Bouquillon , S , Mendez , R A , Rivet , J -P , Le Van Suu , A , Dell'Oro , A , Fedorets , G , Frezouls , B , Granvik , M , Guiraud , J , Muinonen , K , Panem , C , Pauwels , T , Roux , W , Walmsley , G , Petit , J -M , Abe , L , Ayvazian , V , Baillié , K , Baransky , A , Bendjoya , P , Dennefeld , M , Desmars , J , Eggl , S , Godunova , V , Hestroffer , D , Inasaridze , R , Kashuba , V , Krugly , Y N , Molotov , I E , Robert , V , Simon , A , Sokolov , I , Souami , D , Tarady , V , Taris , F , Troianskyi , V , Vasylenko , V & Vernet , D 2021 , ' Potential asteroid discoveries by the ESA Gaia mission : Results from follow-up observations ' , Astronomy & Astrophysics , vol. 648 , 96 . https://doi.org/10.1051/0004-6361/202039579Test; ORCID: /0000-0001-8058-2642/work/95134620; ORCID: /0000-0002-5624-1888/work/95134923; ORCID: /0000-0002-8418-4809/work/95136655; 03491ea1-1808-4f7c-9a46-65321dcb1fba; http://hdl.handle.net/10138/330702Test; 000641867100004 |
| الإتاحة: |
http://hdl.handle.net/10138/330702Test |
| حقوق: |
cc_by ; openAccess ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edsbas.409DD27A |
| قاعدة البيانات: |
BASE |
