Abstract Details

Name: Jessy Jose
Affiliation: IISER Tirupati
Conference ID: ASI2020_555
Title : Youngest, free-floating planetary mass objects in the solar neighbourhood
Authors and Co-Authors : Jessy Jose + W-band Consortium
Abstract Type : Invited
Abstract Category : Stars, ISM and Galaxy
Abstract : Around a dozen young, giant exoplanets have been imaged to date, with masses of 5-13 Jupiter Mass and age <100 Myr. These objects require extremely high contrasts to image and are difficult to characterise, given their proximity to bright host stars. We have designed a custom near-IR filter for the purpose of identifying young, free-floating planetary mass objects. Our 6% wide filter is centered on the prominent 1.45 micron H2O absorption band in the spectra of free-floating planetary mass objects. By combining the H2O sensitive [1.45] imaging with the broad band J and H photometry, our method of photometric selection greatly reduces contamination by reddened background stars. We have conducted a wide-field survey for young free-floating planetary mass objects in the star forming regions of solar neighbourhood. Follow up high resolution and high sensitive imaging and spectroscopic observations are conducted using the state-of-the art space based and ground based observing facilities including HST, Keck, Subaru, Gemini etc. The newly identified coolest, young planetary mass objects and their characteristics will be presented in the talk.