The solar p-mode spectrum of very low l has already been measured with high accuracy for a sufficiently long period of time to permit the search for solar cycle...
The Rotation Speed of the Companion Star in Aquila X-1
We have obtained medium resolution spectra of the neutron star X-ray transient Aql X-1 during quiescence. We determine the spectral type of the companion star...
The spectra of late-type dwarfs and sub-dwarfs in the near ultraviolet. I - Line identifications
Spectra from IUE of 6 main sequence and near main sequence stars from classes A5 to G8, between 2700 A and 2900 A wavelength are described. In toto, some 250...
Understanding the Angular Momentum Evolution of T Tauri and Herbig Ae/Be Stars
We investigate a sample of six Herbig Ae/Be stars belonging to the Orion OB1 association, as well as 73 low-mass objects, members of the σ Orionis cluster, in...