10 papers
Asymmetric, variable H line profile in planetary mass object SR 12 c
Jun Hashimoto, Yuhiko Aoyama, Michihiro Takami +1
Young, forming planetary-mass objects often exhibit clear signatures of ongoing mass accretion and are thought to accrete material through processes analogous to those operating in…
Detectability of resolved hydrogen lines from the accretion shock at gas giants and their CPDs
Gabriel-Dominique Marleau, Thomas Henning, Roy van Boekel +3
Fewer gas giants have been caught in their accretion phase than mature ones are known. Extremely Large Telescope (ELT) instruments will have a higher sensitivity and a smaller inne…
Resolving protoplanetary H-alpha emission with the high-resolution spectrograph RISTRETTO
J. W. Blackman, C. Mordasini, G. -D. Marleau +4
Thousands of exoplanets have been discovered to date, but only a handful of them are young planets in the latter stages of their formation. H-alpha emission is a strong tracer of t…
Ultraviolet Imaging of SR 12 c with HST/WFC3: Accretion and Variability of a Giant Planet at the End Stages of Growth
Claire O. Finley, Brendan P. Bowler, Ya-Lin Wu +12
Many details of the gas accretion phase during giant planet formation remain untested. We present new 0.2$\unicode{x2013}$0.7 m UV-through-red optical imaging of the young, wid…
Hourly radio variability of PDS70c from time-differential photometry
Simon Casassus, Miguel Carcamo, Oriana Dominguez-Jamett +5
The radio emission mechanisms from accreting protoplanets, and their variability, link observations and physical properties. We revisit the variability of the ~343GHz (ALMA Band7)…
ExoplaNeT accRetion mOnitoring sPectroscopic surveY (ENTROPY) - II. Time series of Balmer line profiles of Delorme 1(AB)b
Dorian Demars, Mickaël Bonnefoy, Catherine Dougados +14
Accretion processes in the planetary-mass regime remain poorly constrained, yet they strongly influence planet formation, evolution, and the composition of circumplanetary disks (C…