دورية أكاديمية
Gaia Data Release 3. Hot-star radial velocities
| العنوان: | Gaia Data Release 3. Hot-star radial velocities |
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| المؤلفون: | Blomme, R., Frémat, Y., Sartoretti, P., Guerrier, A., Panuzzo, P., Katz, D., Seabroke, G. M., Thévenin, F., Cropper, M., Benson, K., Damerdji, Yassine, Haigron, R., Marchal, O., Smith, M., Baker, S., Chemin, L., David, M., Dolding, C., Gosset, Eric, Janßen, K., Jasniewicz, G., Lobel, A., Plum, G., Samaras, N., Snaith, O., Soubiran, C., Vanel, O., Zwitter, T., Brouillet, N., Caffau, E., Crifo, F., Fabre, C., Fragkoudi, F., Huckle, H. E., Jean-Antoine Piccolo, A., Lasne, Y., Leclerc, N., Mastrobuono-Battisti, A., Royer, F., Viala, Y., Zorec, J. |
| المصدر: | Astronomy and Astrophysics, 674, A7 (2023-06-01) |
| بيانات النشر: | EDP Sciences |
| سنة النشر: | 2023 |
| المجموعة: | University of Liège: ORBi (Open Repository and Bibliography) |
| مصطلحات موضوعية: | techniques: spectroscopic, techniques: radial velocities, methods, data analysis, catalogs, surveys, stars: massive, Astrophysics - Solar, and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics - Instrumentation and Methods for Astrophysics, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique |
| الوصف: | peer reviewed ; Context. The second Gaia data release, DR2, contained radial velocities of stars with effective temperatures up to T eff = 6900 K. The third data release, Gaia DR3, extends this up to T eff = 14 500 K. Aims: We derive the radial velocities for hot stars (i.e., in the T eff = 6900 − 14 500 K range) from data obtained with the Radial Velocity Spectrometer (RVS) on board Gaia. Methods: The radial velocities were determined by the standard technique of measuring the Doppler shift of a template spectrum that was compared to the observed spectrum. The RVS wavelength range is very limited. The proximity to and systematic blueward offset of the calcium infrared triplet to the hydrogen Paschen lines in hot stars can result in a systematic offset in radial velocity. For the hot stars, we developed a specific code to improve the selection of the template spectrum, thereby avoiding this systematic offset. Results: With the improved code, and with the correction we propose to the DR3 archive radial velocities, we obtain values that agree with reference values to within 3 km s −1 (in median). Because of the required S/N for applying the improved code, the hot star radial velocities in DR3 are mostly limited to stars with a magnitude in the RVS wavelength band ≤12 mag. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0004-6361 1432-0746 |
| العلاقة: | https://ui.adsabs.harvard.edu/abs/2023A&A.674A.7BTest; urn:issn:0004-6361; urn:issn:1432-0746; https://orbi.uliege.be/handle/2268/304681Test; info:hdl:2268/304681; https://orbi.uliege.be/bitstream/2268/304681/1/aa43685-22.pdfTest; scopus-id:2-s2.0-85163663838; arXiV:arXiv:2206.05486 |
| DOI: | 10.1051/0004-6361/202243685 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/202243685Test https://orbi.uliege.be/handle/2268/304681Test https://orbi.uliege.be/bitstream/2268/304681/1/aa43685-22.pdfTest |
| حقوق: | open access ; http://purl.org/coar/access_right/c_abf2Test ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.1228F552 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 00046361 14320746 |
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| DOI: | 10.1051/0004-6361/202243685 |