215 citations · 238 across the 9 of their papers we have counts for
10 papers
Searching for shell stars in LAMOST DR4 by probing the Fe 42 multiplet lines
S. Huemmerich, E. Paunzen, K. Bernhard
Shell stars, in particular the cooler ones, often do not show conspicuous Balmer-line emission and may consequently be missed in surveys that specifically search for emission signa…
An Investigation of Four Chemically Peculiar Stars with Photometric Periods below 12 Hours
Stefan Hümmerich, Klaus Bernhard, Ernst Paunzen +3
We present an investigation of three chemically peculiar (CP) stars and one CP star candidate which exhibit photometric periods below 12 hours. New spectroscopic observations have…
A New Sample of Mid-Infrared Bright, Long-Period Mira Variables from the MACHO Galactic Bulge Fields
Klaus Bernhard, Stefan Uttenthaler, Stefan Hümmerich
Mid-infrared bright objects in the direction of the Galactic Bulge were investigated using time series photometry from the MACHO data archive, which led to the discovery of a large…
An investigation of the RCB star candidate GDS J0702414-023501
Stefan Huemmerich, Klaus Bernhard
2MASS J07024146-0235017 = GDS J0702414-023501 was included in the "Catalogue enriched with R CrB stars" on grounds of its near- and mid-infrared colours. The object, which correspo…
HD 240121 - an ACV variable showing anti-phase variations of the B and V light curves
Rainer Gröbel, Stefan Hümmerich, Ernst Paunzen +1
The variability of HD 240121 = BD+59 2602 was first suspected by Särg & Wramdemark (1970) and later confirmed by Gröbel (1992a,b). Because of the observed anti-phase variations of…
NSV 1907 - A new eclipsing, nova-like cataclysmic variable
Stefan Hümmerich, Rainer Gröbel, Franz-Josef Hambsch +6
NSV 1907, formerly listed as an irregular variable in variability catalogues, was classified as an Algol-type eclipsing binary in the Catalina Surveys Periodic Variable Star Catalo…