Explanipedia

Investigation of the pulsations, outbursts, and evolution of the yellow hypergiants Open

A. M. van Genderen, A. Lobel, R. Timmerman, E. Deul, Alexis De Vos , et al. · 2025

In this predominantly photometric study, we investigate various types of photometric and physical instabilities in the yellow hypergiant (YHG) ρ Cas as well as its evolution between 1885 and 2023. The second yellow hypergiant we study is Y…

A Sixteen-years Delay in Sun-related Terrestrial Warming Open

A. C. T. Nieuwenhuizen, C. de Jager, H. Nieuwenhuijzen · 2020

In an earlier paper De Jager et al. (2018) studied the relation between the intensity variations of the variable equatorial and polar solar magnetic energy sources and that of the average terrestrial northern hemisphere ground temperature.…

Pulsations, eruptions, and evolution of four yellow hypergiants Open

A. M. van Genderen, A. Lobel, H. Nieuwenhuijzen, Gregory W. Henry, C. de Jager , et al. · 2019

\nAims. We aim to explore the variable photometric and stellar properties of four yellow hypergiants (YHGs), HR 8752, HR 5171A, ρ Cas, and HD 179821, and their pulsations of hundreds of days, and long-term variations (LTVs) of years. We al…

A Remarkable Recent Transition in the Solar Dynamo Open

C. de Jager, S.‐I. Akasofu, S. Duhau, W. Livingston, H. Nieuwenhuijzen , et al. · 2016

We summarize the major aspects of the remarkable, fairly long lasting period(∼ 2005 to ∼ 2010) of low solar activity, that we will call the Transition. It is the transitionalstage between the Grand Maximum of the 20th century and a forthco…

An early detection of blue luminescence by neutral PAHs in the direction of the yellow hypergiant HR 5171A? Open

A. M. van Genderen, H. Nieuwenhuijzen, A. Lobel · 2015

\n Aims. We re-examined photometry (VBLUW, UBV, uvby) of the yellow hypergiant HR 5171A made a few decades ago. In that study no proper explanation could be given for the enigmatic brightness excesses in the L band (VBLUW system, λeff = 3…

H. Nieuwenhuijzen YOU? Author Swipe