Next Article in Journal / Special Issue
Jsolated Stars of Low Metallicity
Previous Article in Journal
R-Matrix Scattering Calculations for Iron-Peak Species: Photoionisation of Fe I and Electron-Impact Excitation of Fe II
Previous Article in Special Issue
Surveying Planetary Nebulae Central Stars for Close Binaries: Constraining Evolution of Central Stars Based on Binary Parameters
Article Menu
Issue 3 (September) cover image

Export Article

Open AccessArticle
Galaxies 2018, 6(3), 88;

Revealing the True Nature of Hen 2-428

Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany
Instituto de Astrofísica de La Plata, UNLP-CONICET, La Plata, 1900 Buenos Aires, Argentina
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching, Germany
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Received: 19 June 2018 / Revised: 7 August 2018 / Accepted: 10 August 2018 / Published: 14 August 2018
(This article belongs to the Special Issue Asymmetric Planetary Nebulae VII)
PDF [641 KB, uploaded 14 August 2018]


The nucleus of Hen 2-428 is a short orbital period (4.2 h) spectroscopic binary, whose status as potential supernovae type Ia progenitor has raised some controversy in the literature. We present preliminary results of a thorough analysis of this interesting system, which combines quantitative non-local thermodynamic (non-LTE) equilibrium spectral modelling, radial velocity analysis, multi-band light curve fitting, and state-of-the art stellar evolutionary calculations. Importantly, we find that the dynamical system mass that is derived by using all available He II lines does not exceed the Chandrasekhar mass limit. Furthermore, the individual masses of the two central stars are too small to lead to an SN Ia in case of a dynamical explosion during the merger process. View Full-Text
Keywords: binaries: spectroscopic; stars: atmospheres; stars: abundances; supernovae binaries: spectroscopic; stars: atmospheres; stars: abundances; supernovae

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
Printed Edition Available!
A printed edition of this Special Issue is available here.

Share & Cite This Article

MDPI and ACS Style

Reindl, N.; Finch, N.L.; Schaffenroth, V.; Barstow, M.A.; Casewell, S.L.; Geier, S.; Miller Bertolami, M.M.; Taubenberger, S. Revealing the True Nature of Hen 2-428. Galaxies 2018, 6, 88.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Galaxies EISSN 2075-4434 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top