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SUMMARY:From Exoplanet Detection to Demographics: Inferring the Physical O
 rigins of the Close-in Exoplanet Population [Astrophysics Seminar]
DTSTART:20260227T060000Z
DTEND:20260227T070000Z
DTSTAMP:20260418T031700Z
UID:indico-event-411@events.iiap.res.in
DESCRIPTION:Speakers: Aritra Chakrabarty (NASA AMES)\n\nAbstract: Exoplan
 et demographics provide crucial constraints on planet formation and evolut
 ion\, but their reliability depends on precise and complete measurements. 
 I begin by presenting the results from our targeted ground-based photometr
 ic follow-up using Indian telescopes\, where improved photometry and advan
 ced denoising sharpen key demographic parameters\, such as planet size and
  mass\, showing how precise measurements directly strengthen population an
 alyses. I then turn to small planets\, where the Kepler mission remains a 
 crucial source of knowledge. On the one hand\, I focus on reprocessing Kep
 ler’s pixel-level data with improved completeness and rigorous vetting o
 f low-signal-to-noise detections to refine occurrence rates\, including co
 nstraints on 'eta-Earth'—the frequency of Earth-sized planets in the hab
 itable zones of Sun-like stars in our neighbourhood. These results are ess
 ential for the design of upcoming missions like the Habitable Worlds Obser
 vatory (HWO). Conversely\, I explore the enigmatic worlds of super-Earths 
 and sub-Neptunes\, bridging terrestrial and Neptune-sized planets. By comb
 ining demographic trends from Kepler\, the Transiting Exoplanet Survey Sat
 ellite (TESS)\, and ground-based radial velocity observations with formati
 on and interior structure models\, I investigate evolutionary pathways and
  constrain likely compositions. Together\, this work provides a step towar
 d a broader understanding of how planetary systems\, including our own\, f
 ormed\, and how rare or common Earth-like planets may be.\n\nhttps://event
 s.iiap.res.in/event/411/
LOCATION:Auditorium
URL:https://events.iiap.res.in/event/411/
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