Stellar Astrophysics Centre:

Research on the Sun, stars

and extra-solar planets


The image above shows the M4 globular cluster and the position in the sky of some of the stars in which acoustic oscillations were detected. By hovering the mouse over the targets you will hear the sounds characteristic of their global oscillations. The pitch (frequencies) of the sounds have been raised by a factor 10 million to bring them into the audible range.  On the same frequency scale, the acoustic oscillations of the Sun would be so high that they would fall in the ultrasound regime.  The relative sizes of the stars studied in this work are illustrated on the right-hand panel: these are giant stars with radii from eight to sixteen times that of the Sun (which explains why their modes have such low frequencies compared to those detected in the Sun).

2016.06.07 | Research news, Public/media, Staff, Students

Asteroseismologists listen to the relics of the Milky Way: sounds from the oldest stars in our Galaxy

An international group of astrophysicists from the universities of Birmingham, Aarhus, Paris, Padua, San Diego and from Mt Stromlo Observatory in Australia have captured the sounds of some of the oldest stars in our galaxy, the Milky Way, according to research published 7 June 2016 in the Royal Astronomical Society journal Monthly Notices.

Artist's impression of a hot super-Earth being stripped of it's atmosphere due to being too close to the mother planet. (image credit: Peter Devine)

2016.04.11 | Public/media, Staff, Students

Don't come too close to the stars if you are a super-Earth

Coming too close to the fire will get your fingers burnt. This is also valid for exoplanets orbiting remote stars. Mia S. Lundkvist et al; many affiliated with SAC, have shown that it is also true in the real world. Recent paper titled "Hot super-Earths stripped by their host stars" in Nature Communications.

2016.03.23 | Public/media

Deadly stars - the Sun included

It happened in 1859, almost in 2012. It will happen again: The Sun erupts in an enormous flare able to destroy the electromagnetic infrastructure on Earth. Christoffer Karoff and Mads Faurschou Knudsen of IFA and Department of Geoscience warns in a paper in Nature Communications: Not the end of the World - just of civilization!

2016.01.25 | Public/media, Staff, Students

Victor Silva Aguirre awarded an AUFF grant

SAC's leading role in exoplanet research secured into the TESS era with recent grant from Aarhus University Research Foundation for Victor Silva Aguirre.

2016.01.12 | Public/media, Staff, Students

New SAC postdoc - Remo Collet

Remo Collet has joined the Stellar Astrophysics Centre 1 January 2016

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