Giorgio Di Scala
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View article: A Demonstration of Interstellar Navigation Using New Horizons
A Demonstration of Interstellar Navigation Using New Horizons Open
As NASA’s New Horizons spacecraft exits the solar system bound for interstellar space, it has traveled so far that the nearest stars have shifted markedly from their positions seen from Earth. We demonstrated this by imaging the Proxima Ce…
View article: A Demonstration of Interstellar Navigation Using New Horizons
A Demonstration of Interstellar Navigation Using New Horizons Open
As NASA's New Horizons spacecraft exits the Solar System bound for interstellar space, it has traveled so far that the nearest stars have shifted markedly from their positions seen from Earth. We demonstrated this by imaging the Proxima Ce…
View article: Investigation of the pulsations, outbursts, and evolution of the yellow hypergiants
Investigation of the pulsations, outbursts, and evolution of the yellow hypergiants Open
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…
View article: The Long-term Spectral Changes of Eta Carinae: Are they Caused by a Dissipating Occulter as Indicated by cmfgen Models?
The Long-term Spectral Changes of Eta Carinae: Are they Caused by a Dissipating Occulter as Indicated by cmfgen Models? Open
Eta Carinae ( η Car) exhibits a unique set of P Cygni profiles with both broad and narrow components. Over many decades, the spectrum has changed—there has been an increase in observed continuum fluxes and a decrease in Fe ii and H i emiss…
View article: Pulsations, eruptions, and evolution of four yellow hypergiants
Pulsations, eruptions, and evolution of four yellow hypergiants Open
\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…