Now showing items 11-20 of 61
EXO 023432-5232.3 - an eclipsing AM Herculis binary
The authors report observations of the serendipitous EXOSAT source EXO 023432-5232.3 which confirm that the object is an AM Herculis type binary and show the presence of eclipses by the companion star. From high-speed ...
The polarization of NGC 1068
Broad-band polarimetry of NGC 1068 over the wavelength range 0.36 - 4.8 μm is presented, together with high-resolution spectropolarimetry of the Hβ, [O III] and Hα, [N II] regions of the spectrum. The authors recognize ...
Infrared reflection nebula in W75N
A new infrared reflection nebula is identified in the W75N region. The K-band polarization map shows a centrosymmetric pattern of the vectors extending over a region 2 arcmin in size, with large values of degrees of ...
Photometry and polarimetry of AM Herculis in its faint state
Infrared and optical photometry and polarimetry of AM Herculis during the faint state of its long-term light variations are presented. The contributions of the two stellar photospheres are estimated and the distance of the ...
Magnetic field structure in dark clouds
(Reidel Publishing Company (Kluwer), 1987)
Polarimetric mapping of a new infrared reflection nebula GGD 27 IRS
We report the discovery of an infrared reflection nebula GGD27 IRS, near the optical nebulosity GGD27. It shows a dumbbell-shaped structure with large degrees of polarization, up to 64%, in the K band. From the centrosymmetric ...
Interstellar polarization in the dust lane of Centaurus A (NGC 5128)
Optical and infrared linear polarization measurements of the Type 1 supernova 1986G in Centaurus A are used to determine the wavelength dependence of polarization produced by transmission of radiation through the dust lane ...
A high resolution hydrogen-line survey of Messier 31. III : H I holes in the interstellar medium
An analysis is carried out of H I holes in M 31 as detected with the Westerbork radiotelescope. The holes range from 100-1000 pc across and represent missing masses ranging from 1000-10 million solar masses, which would ...