The spectroscopic variability of T$_{\rm eff}$ and $\log g$ in $β$ Cep
| dc.creator | Catanzaro, G. | |
| dc.creator | Leone, F. | |
| dc.date | 2008-07-03 | |
| dc.date.accessioned | 2026-07-07T09:48:12Z | |
| dc.date.available | 2026-07-07T09:48:12Z | |
| dc.description | Time resolved spectra of $β$ Cep yield the following average results: T$_{\rm eff}$ =24000 $\pm$ 250 K, $\log g$ = 3.91 $\pm$ 0.05 and $ξ$ = 8.1 $\pm$ 0.9 km s$^{-1}$. N, O, Ne, Al, Si and S abundances are solar while C, Mg and Fe are slightly under-abundant. Pulsational amplitudes of $Δ$T$_{\rm eff}$ $\sim$ 700 K and $Δ$$\log g$ $\sim$ 0.2 dex are found from H$β$. The metal lines give similar amplitudes but centred on T$_{\rm eff}$ $\sim$ 25000 K. An upper limit of 1.0 km s$^{-1}$ to the variability of the microturbulence is derived from the Si {\sc iii} triplet at 455 nm. The radial velocity amplitude derived from the core of H$β$ is $\sim$ 15% greater than that from the metal lines. | |
| dc.description | 5 pages, 4 figures, MNRAS accepted | |
| dc.identifier | https://arxiv.org/abs/0807.0495 | |
| dc.identifier | http://arxiv.org/abs/0807.0495 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/164127 | |
| dc.subject | Astrophysics | |
| dc.title | The spectroscopic variability of T$_{\rm eff}$ and $\log g$ in $β$ Cep | |
| dc.type | text |