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NGC 1647: A young open cluster with a broad main sequence observed with LAMOST
A. Frasca, M. Qin, J. ALonso-Santiago +4
In this work we present the results of our analysis of medium-resolution LAMOST spectra of candidate members of the cluster NGC 1647 with the aim of determining the stellar paramet…
Discovery of the binary nature of the magnetospheric B-type star Oph A
M. E. Shultz, I. Berry, D. Bohlender +11
The nearby B-type star Oph A was recently identified as a rapidly rotating magnetic B-type star with variable radio and X-ray emission consistent with a magnetospheric origin.…
Super-slowly rotating Ap (ssrAp) stars: Spectroscopic study
G. Mathys, D. L. Holdsworth, M. Giarrusso +3
To gain better understanding of the Ap stars with the longest rotation periods, we obtained high resolution spectra of a sample of super-slowly rotating Ap (ssrAp) star candidates…
Stellar population astrophysics (SPA) with the TNG: Measurement of the He I 10830Å line in the open cluster Stock 2
Mingjie Jian, Xiaoting Fu, Noriyuki Matsunaga +10
The precise measurement of stellar abundances plays a pivotal role in providing constraints on the chemical evolution of the Galaxy. However, before spectral lines can be employed…
TESS photometry and CAOS spectroscopy of six eclipsing binaries with Am components
G. Catanzaro, A. Frasca, J. Alonso-Santiago +1
In this paper, we present the results of a comprehensive study of six eclipsing binaries whose components are confirmed or suspected Am stars. By combining long-term high-resolutio…
OGLE GD-CEP-0516: the most metal-poor lithium-rich Galactic Cepheid
G. Catanzaro, V. Ripepi, M. Salaris +1
Classical Cepheids (DCEPs) are important astrophysical objects not only as standard candles for the determination of the cosmic distance ladder but also as a test-bed for the stell…