A celestial matryoshka: dynamical and spectroscopic analysis of the Albireo system
We present a spectroscopic characterization and a new orbital solution for the binary system β Cyg Aa/Ac (MCA 55), the primary component ( β Cyg A) of the well-known wide double star Albireo. By matching evolutionary tracks to the physical parameters of all three Albireo stars ( β Cyg Aa, Ac, and B...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
12 January 2021
|
| In: |
Monthly notices of the Royal Astronomical Society
Year: 2021, Volume: 502, Issue: 1, Pages: 328-350 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/staa4038 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/staa4038
|
| Author Notes: | Ronald Drimmel, Alessandro Sozzetti, Klaus-Peter Schröder, Ulrich Bastian, Matteo Pinamonti, Dennis Jack and Missael A. Hernández Huerta |
| Summary: | We present a spectroscopic characterization and a new orbital solution for the binary system β Cyg Aa/Ac (MCA 55), the primary component ( β Cyg A) of the well-known wide double star Albireo. By matching evolutionary tracks to the physical parameters of all three Albireo stars ( β Cyg Aa, Ac, and B) as obtained from a spectroscopic analysis of TIGRE and IUE spectra, we confirm that they are likely coeval. Our final orbit solution is based on radial-velocity measurements taken over a baseline exceeding 120 yr, combined with relative astrometry from speckle interferometric observations and the absolute astrometry from the Hipparcos and Gaia missions. Our final orbit solution has a period of 121.65$^{+3.34}_{-2.90}$ yr with an eccentricity of 0.20$^{+0.01}_{-0.02}$. Thanks to the inclusion of the absolute astrometry, we find a mass ratio of |
|---|---|
| Item Description: | Gesehen am 05.08.2021 |
| Physical Description: | Online Resource |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/staa4038 |