Patrick Gaulme

@[email protected]
13 Followers
47 Following
8 Posts

Tenure-track scientist at Thüringer Landessternwarte Tautenburg.

Stellar physics: red giants, multiple systems, asteroseismology
Planetology: atmospheric dynamics of Jupiter, Venus
Observer: photometry, spectroscopy, time series

Messages in EN, FR, IT

Patrick GaulmeFeb 27, 2024
Deadline Monday March 4 for submitting abstracts! We're aiming at gathering experts of binary stars, asteroseismology, including theoreticians and observers to build up new projects.
Patrick GaulmeDec 5, 2023
We are used to see the
#NASAHubble images in color, processed, well framed and they are amazing.
But I also love the calibrated images that have no color, no reframe, no derotation, no fancy effect. This image is from the OPAL program in 2018 (https://archive.stsci.edu/hlsp/opal)
OPAL

MAST
Show threadPatrick GaulmeNov 23, 2023
Regarding the "Dopplergram" (right plot): it is a map of the Doppler shift of solar lines reflected by Jupiter. Blue toward us, red away. Since Jupiter was at opposition, the Doppler shift is doubled. Velocities run from +25 to -25 km/s (actual rotation velocity is half at equator)
Show threadPatrick GaulmeNov 23, 2023
Note: compared with lucky-imaging done by incredible amateur astronomer, this image *really* sucks. We are aware... but this picture is the result of a 30-s exposure, meaning that we get all the seeing alteration. The more we expose the finest is our velocity measurement, but we loose resolution.
Patrick GaulmeNov 23, 2023
Currently working hard to publish the first zonal wind map of Jupiter obtained with high-resolution spectroscopy in the visible. JOVIAL instrument developed at Observatoire Côte d'Azur.
Teaser: picture of Jupiter taken by the JOVIAL/JIVE instrument at Sunspot (NM), and its radial velocity map "dopplergram" (Jup spins!)
Patrick GaulmeNov 3, 2023
I'm willing to figure out how Mastodon works.