Abstract Details
| Name: Himanshu Tyagi Affiliation: Tata Institute of Fundamental Research Conference ID: ASI2025_138 Title : IPA: Unveiling a New Era of Protostellar Winds with JWST Authors and Co-Authors : Himanshu Tyagi 1, P. Manoj 1, Mayank Narang 1, 2, Dan M. Watson 3, S. Thomas Megeath 4, Samuel Federman 4, David A. Neufeld 31, Adam E. Rubinstein 3, Robert Gutermuth 5, Alessio Caratti o Garatti 6, Henrik Beuther 7, Tyler L. Bourke 8, Ewine F. Van Dishoeck 9, 10, Neal J. Evans II 11, Guillem Anglada 12, Mayra Osorio 12, Thomas Stanke 10, James Muzerolle 13, Leslie W. Looney 14, 15, Yao-Lun Yang 16, John J. Tobin 15, Pamela Klaassen 17, Nicole Karnath 18, 19, Prabhani Atnagulov 20, Nashanty Brunken 9, William J. Fischer 21, Elise Furlan 22, Joel Green 21, Nolan Habel 23, Lee Hartmann 24, Hendrik Linz 7, 25, Pooneh Nazari 9, Riwaj Pokhrel 26, Rohan Rahatgaonkar 27, Will R. M. Rocha 28, Patrick Sheehan 15, Katerina Slavicinska 9, Amelia M. Stutz 29, Lukasz Tychoniec 30, and Scott Wolk 19 Abstract Type : Poster Abstract Category : Stars, Interstellar Medium, and Astrochemistry in Milky Way Abstract : Protostellar jets and winds play a crucial role in the evolution of protostellar systems by removing angular momentum and enabling accretion, while also regulating star formation rates through feedback on their parent molecular clouds. However, the mechanisms driving jet and wind formation, as well as their feedback effects, remain poorly understood. We will present the latest results from the JWST Cycle 1 GO program Investigating Protostellar Accretion (IPA) that observed five Class 0 protostars across a broad luminosity range (0.2 to 10,000 Lsun). Our high angular resolution spectral imaging from JWST offers unprecedented insights into the morphology, kinematics, and dynamics of these wide-angle winds traced by the molecular hydrogen (H_2) emission. We observe complex emission structures, with JWST revealing a wide hourglass-shaped outer boundary in multiple ro-vibrational and pure-rotational H_2 lines. Complementary ALMA 12CO observations, which trace the broader wind cavities, align with JWST's scattered light data, showing that H_2 winds are more narrowly confined than the low-J CO winds—indicating that H_2 likely traces disk winds. Additionally, our findings suggest that the wide-angle winds are not driven by atomic jets. We will discuss the implications of these results for our understanding of protostellar wind launching mechanisms and their impact on molecular clouds. |