SIMBAD references

2018MNRAS.478..867P - Mon. Not. R. Astron. Soc., 478, 867-884 (2018/July-3)

The sdA problem - II. Photometric and spectroscopic follow-up.

PELISOLI I., KEPLER S.O., KOESTER D., CASTANHEIRA B.G., ROMERO A.D. and FRAGA L.

Abstract (from CDS):

The spectral classification 'subdwarf A' (sdA) is given to stars showing H-rich spectra and sub-main-sequence surface gravities, but effective temperature lower than the zero-age horizontal branch. Their evolutionary origin is an enigma. In this work, we discuss the results of follow-up observations of selected sdAs. We obtained time-resolved spectroscopy for 24 objects and time-series photometry for another 19 objects. For two targets, we report both spectroscopy and photometry observations. We confirm seven objects to be new extremely low-mass white dwarfs (ELMs), one of which is a known eclipsing star. We also find the eighth member of the pulsating ELM class.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): subdwarfs - binaries: general - stars: evolution - white dwarfs

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 45

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