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The BOES Spectropolarimeter for Zeeman Measurements of Stellar Magnetic Fields
We introduce a new polarimeter installed on the high-resolution fiber-fed echelle spectrograph (called BOES) of the 1.8 m telescope at the Bohyunsan Optical Astronomy Observatory, Korea. TheExpand
C60+ – looking for the bucky-ball in interstellar space
The laboratory gas phase spectrum recently published by Campbell et al. has reinvigorated attempts to confirm the presence of the C$_{60}^+$ cation in the interstellar medium, thorough an analysis ofExpand
On the incidence of weak magnetic fields in DA white dwarfs
Context. About 10 % of white dwarfs have magnetic fields with strength i n the range between about 10 5 and 5 10 8 G. It is not known whether the remaining white dwarfs are not magnetic, or if theyExpand
Automation of the OAN/SPM 1.5-meter Johnson telescope for operations with RATIR
The Reionization And Transients Infra-Red (RATIR) camera is intended for robotic operation on the 1.5-meter Harold Johnson telescope of the Observatorio Astronómico Nacional on the Sierra de SanExpand
The Peculiar Magnetic Field Morphology of the White Dwarf WD 1953–011: Evidence for a Large-Scale Magnetic Flux Tube?
We present and interpret new spectropolarimetric observations of the magnetic white dwarf WD 1953–011. Circular polarization and intensity spectra of the Hα spectral line demonstrate the presence ofExpand
Suppression of cooling by strong magnetic fields in white dwarf stars
Isolated cool white dwarf stars more often have strong magnetic fields than young, hotter white dwarfs, which has been a puzzle because magnetic fields are expected to decay with time but a coolExpand
Cyclic brightening in the short-period WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2
Aims. We observed a new cataclysmic variable (CV) SDSS J080434.20+510349.2 to study the origin of long-term variability found in its light curve. Methods. Multi-longitude, time-resolved, photometricExpand
A spectroscopic and photometric study of the planetary nebulae Kn 61 and Pa 5
We present the first morpho-kinematical analysis of the planetary nebulae Kn 61 and Pa 5 and explore the nature of their central stars. Our analysis is based on high resolution and medium resolutionExpand
Magnetic fields and rotation of the white dwarfs 40 Eri B and WD 0009+501
We describe the results of our magnetometric monitoring of two white dwarfs: 40 Eri B and WD 0009+501. We found periodic variations in the longitudinal magnetic field of 40 Eri B. The fieldExpand
By using high dispersion spectra obtained by the 1.8 m telescope of Bohyunsan Optical Astronomy Observatory (South Korea), multiline least-square deconvolution of line profiles, and Fourier analysisExpand