2nd National Sweden SKA Science Day

Session

Radio stars and stellar evolution

11 Sept 2024, 09:00

Veras gräsmatta, Campus Johanneberg, Chalmers University

35. Invited: Radio stars and exoplanets

Joe Callingham (ASTRON)

11/09/2024, 09:00

Invited talk

One key question that astronomy is attempting to answer is whether there are habitable planets around stars other than our Sun. While we have entered an era where identifying nearby exoplanets has become standard, discerning whether the environmental conditions dictated by the host stars are suitable for life has proved far more elusive. The detection of low-frequency radio emission from an M...

36. Radio emission from stellar bowshocks in massive runaway stars

Santiago Del Palacio (Chalmers University)

11/09/2024, 09:30

Contributed talk

Massive stars launch hypersonic winds that generate strong shocks in the interstellar medium. In the case of runaway stars with supersonic peculiar velocities, the resulting shock structure forms a distinctive bow shape, known as a bowshock. Within these shocks, the material heats up and compresses, producing free-free radiation, while also relativistic particles are accelerated, leading to...

37. Exploring the structure of evolved stars’ extended atmospheres: SKA capabilities and observation opportunities

Behzad Bojnordi Arbab (Chalmers University)

11/09/2024, 09:50

Contributed talk

The heavy mass-loss experienced by evolved asymptotic giant branch (AGB) stars provides metals and dust to the interstellar medium (ISM). In our current understanding, mass loss occurs through dust-driven winds originating from the extended atmospheres of these stars. State-of-the-art simula- tions show that large convective cells play an important role, but recent observations at...