| Name: | Manoj Puravankara |
| Affiliation: | Tata Institute of Fundamental Research, Mumbai |
| Conference ID : | ASI2023_506 |
| Title : | Investigating Protostellar Accretion (IPA) across the Mass Spectrum: First results from the JWST Cycle 1 program |
| Authors : | Manoj Puravankara, Tom Megeath, Dan Watson, Mayank Narang, Himanshu Tyagi, Rob Gutermuth, Yao-Lun Yang, James Muzerolle, Sam Federman, Adam Rubinstein, Neal Evans, Ewine van Dishoeck and the IPA team. |
| Mode of Presentation: | Oral |
| Abstract Category : | Stars, ISM and Galaxy |
| Abstract : | Investigating Protostellar Accretion (IPA) is a 66 hrs Cycle 1 JWST program that will observe five deeply embedded protostars in their primary accretion phase, ranging in mass from 0.1 M_sun to 12 M_sun (0.2 to 10000 L_sun) with NIRSpec and MIRI IFU. Leveraging the unprecedented combination of sensitivity, angular resolution, wavelength coverage, and spectral resolution of the JWST, we have obtained NIRSpec and MIRI data cubes that are rich in line emission and ice absorption features. IPA has produced 1-d spectra in the 2-28 micron range and line maps of ionic, atomic, and molecular emission and ice absorption from these protostars down to spatial scales of ~ 30 au. We will present an inventory of the lines, the ice features detected, and their spatial maps. We will measure the accretion rate and the mode of accretion from the spectroscopic signatures of disk accretion and investigate how they scale with protostellar mass. We will also study line diagnostics of shocks produced by jets/outflows and measure mass flow rates in the winds along the envelope cavities in these protostars. Our JWST observations provide, in unprecedented detail, a comprehensive picture of coupled accretion and feedback that plays a central role in determining the masses of stars and shaping the conditions for planet formation in protoplanetary disks. |
