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SUMMARY:JWST Coronagraphic Images of 14 Her c: A Cold Giant Planet in a Dy
 namically Hot Multiplanet System
DTSTART:20260420T123000Z
DTEND:20260420T124500Z
DTSTAMP:20260418T160300Z
UID:indico-event-1799@indico.dfa.unipd.it
DESCRIPTION:Speakers: Riccardo Simonetto (INAF-Università degli Studi di 
 Padova)\nMost observed multiplanet systems are coplanar\, in a dynamically
  “cold” configuration of concentric orbits like our own solar system. 
 With the James Webb Space Telescope\, we have detected 14 Her c\, the firs
 t mature and cold exoplanet directly imaged in a dynamically “hot” mul
 tiplanet system. With large eccentricities and a nonzero mutual inclinatio
 n\, the present-day architecture of this system points to a turbulent past
  and ongoing angular momentum exchange between the planetary orbits of 14 
 Her b and c. The temperature of 14 Her c rivals both the coldest imaged ex
 oplanet and the coldest known brown dwarf. Moreover\, its photometry at 4.
 4 μm is consistent with the presence of carbon disequilibrium chemistry 
 and water-ice clouds in its atmosphere. 14 Her c presents a unique laborat
 ory to study giant planet formation\, the dynamical evolution of multiplan
 et system architectures\, and atmospheric composition and dynamics in extr
 emely cold worlds.\n\nhttps://indico.dfa.unipd.it/event/1799/
LOCATION:Aula Rosino (Dipartimento di Fisica e Astronomia - Edificio ex-Ri
 zzato)
URL:https://indico.dfa.unipd.it/event/1799/
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