5 papers · 1 filter
The enigmatic B[e] star Hen 2-90 -- an interacting binary?
Michaela Kraus, Marcelo Borges Fernandes, Francisco X. de Araujo
We present the enigmatic galactic unclassified B[e] star Hen 2-90. Its optical spectrum is discussed and analysed in terms of the forbidden emission lines coming from a non-spheric…
The outflowing disks of B[e] supergiants and unclassified B[e] stars
Michaela Kraus, Marcelo Borges Fernandes
B[e] supergiants are known to possess outflowing cool disks but also some unclassified B[e] stars show clear indications for the presence of a neutral disk. We derive constraints o…
Parameters of PNe: constant density versus density distribution
Michaela Kraus
We derive the stellar and circumstellar parameters of the Galactic compact planetary nebula Hen 2-90 with two models: the classical constant density nebula model where the emission…
The Analysis of the Rotating Disk of some Southern Galactic B[e] Stars
Marcelo Borges Fernandes, H. J. G. L. M. Lamers, Michaela Kraus
The spectra of stars with the B[e] phenomenon are dominated by features that are related to physical conditions of circumstellar material around these objects and are not intrinsic…
CO band emission from MWC349: I. First overtone bands from a disk or from a wind?
M. Kraus, E. Kruegel, C. Thum +1
We observed the near infrared emission in the wavelength range 2.28-2.50 micron from the peculiar B[e]-star MWC349. The spectra contain besides the strong IR continuum the first ov…