Rohan Rahatgaonkar
A5065901386- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Atmospheric Ozone and Climate
- Molecular Spectroscopy and Structure
- Spectroscopy and Laser Applications
- Spacecraft and Cryogenic Technologies
- Space Exploration and Technology
- Astrophysical Phenomena and Observations
- Phase Equilibria and Thermodynamics
Gemini South Observatory
2024
Gemini North Observatory
2024
San Diego State University
2022-2023
Investigating Protostellar Accretion is a Cycle 1 JWST program using the NIRSpec+MIRI integral field units to obtain 2.9--28 $\mu$m spectral cubes of five young protostars with luminosities 0.2-10,000 L$_{\odot}$ in their primary accretion phase. This paper introduces NIRSpec 2.9--5.3 data inner 840-9000 au spatial resolutions from 28-300 au. The spectra show rising continuum emission; deep ice absorption; emission H$_{2}$, H~I, and [Fe~II]; CO fundamental series absorption. Maps scattered...
Abstract Investigating Protostellar Accretion (IPA) is a JWST Cycle 1 GO program that uses NIRSpec integral field units and MIRI Medium Resolution Spectrograph to obtain 2.9–28 μ m spectral cubes of young, deeply embedded protostars with luminosities 0.2–10,000 L ⊙ central masses 0.15–12 M . In this Letter, we report the discovery highly collimated atomic jet from Class 0 protostar IRAS 16253−2429, lowest-luminosity source ( bol = 0.2 ) in IPA program. The detected multiple [Fe ii ] lines...
The structure and composition of simple ices can be modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal chemical tracers that diagnose history environment ice. 15.2 $\mu$m bending mode $^{12}$CO$_2$ has proven a valuable tracer ice heating events but suffers from grain shape size effects. A viable alternative is weaker $^{13}$CO$_2$ isotopologue band at 4.39 which now become accessible high S/N with $\textit{James Webb}$ Space...
Abstract The composition of protoplanetary disks, and hence the initial conditions planet formation, may be strongly influenced by infall thermal processing material during protostellar phase. dust ice in envelopes, shaped energetic processes driven protostar, serves as fundamental building for planets complex organic molecules. As part JWST General Observers program, “Investigating Protostellar Accretion,” we observed an intermediate-mass protostar HOPS 370 (OMC2-FIR3) using NIRSpec...
Abstract We present an 870 μ m continuum survey of 300 protostars from the Herschel Orion Protostar Survey using Atacama Compact Array (ACA). These data measure protostellar flux densities on envelope scales ≤8000 au (20″) and resolve structure envelopes with 1600 (4″) resolution, a factor 3–5 improvement in angular resolution over existing single-dish observations. compare ACA observations to Large Millimeter/submillimeter 12 array at ∼0.″1 (40 au) resolution. Using fluxes disks within 2500...
The structure and composition of simple ices can be severely modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal chemical tracers that used diagnose history environment ice. 15.2 µm bending mode 12 CO 2 in particular has proven a valuable tracer ice heating events but suffers from grain shape size effects. A viable alternative is weaker 13 isotopologue band at 4.39 µm, which now become accessible high S/N with James Webb Space...
The composition of protoplanetary disks, and hence the initial conditions planet formation, may be strongly influenced by infall thermal processing material during protostellar phase. Composition dust ice in envelopes, shaped energetic processes driven protostar, serves as fundamental building for planets complex organic molecules. As part JWST GO program, "Investigating Protostellar Accretion" (IPA), we observed an intermediate-mass protostar HOPS 370 (OMC2-FIR3) using NIRSpec/IFU MIRI/MRS....
Investigating Protostellar Accretion (IPA) is a JWST Cycle~1 GO program that uses NIRSpec IFU and MIRI MRS to obtain 2.9--28~$\mu$m spectral cubes of young, deeply embedded protostars with luminosities 0.2 10,000~L$_{\odot}$ central masses 0.15 12~M$_{\odot}$. In this Letter, we report the discovery highly collimated atomic jet from Class~0 protostar IRAS~16253$-$2429, lowest luminosity source ($L_\mathrm{bol}$ = $L_\odot$) in IPA program. The detected multiple [Fe~II] lines, [Ne~II],...
Investigating Protostellar Accretion (IPA) is a Cycle 1 JWST program using the NIRSpec+MIRI IFUs to obtain 2.9--28 $μ$m spectral cubes of five young protostars with luminosities 0.2 10,000 L$_{\odot}$ in their primary accretion phase. This paper introduces NIRSpec 2.9--5.3 data inner 840-9000 au spatial resolutions from 28-300 au. The spectra show rising continuum emission, deep ice absorption, emission H$_{2}$, H~I, and [Fe~II], CO fundamental series absorption. Maps scattered light...
We present an 870 $μ$m continuum survey of 300 protostars from the Herschel Orion Protostar Survey using Atacama Compact Array (ACA). These data measure protostellar flux densities on envelope scales $\leq$8000 au (20") and resolve structure envelopes with 1600 (4") resolution, a factor 3-5 improvement in angular resolution over existing single-dish observations. compare ACA observations to Large Millimeter/submillimeter 12 m array at $\sim$0.1 (40 au) resolution. Using fluxes disks within...