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What We Do

CORINOS I: JWST/MIRI Spectroscopy and Imaging of a Class 0 protostar IRAS 15398-3359 - maps, data cubes, and first models of complex organic molecule ice features, gas phase/line emission from outflows, and detection of the hot inner circumstellar disk of IRAS 15398-3359 - program 2151 (Yang et al. 2022).

First Publications of General Observer Programs with JWST - In addition to several guaranteed and early release programs, members of the star and planet formation group are PI or co-I on more than 15 JWST general observer programs including GO-1549, GO-1563, GO-1584, GO-1611, GO-1640, GO-1751, GO-1798, GO-1802, GO-1906, GO-1960, GO-2025, GO-2053GO-2092, GO-2151, GO-2183, GO-2209, GO-2278, and others in Cycles 1 and 2.

 

Characterizing UV Emission from YSOs – using HST-COS and HST-STIS spectra to study LyA and continuum emission from Classical T Tauri stars and map distributions of hot molecular gas in protoplanetary disks, e.g., Arulanantham et al. (2018, 2020)

Chemistry of Protoplanetary Disks around Young Starsa series of programs to understand the relationship between the system properties and the kinds of materials available to form planets. e.g., Banzatti et al. (2017); Blevins et al. (2016)

Understanding episodic accretionUsing mid-infrared photometry (Spitzer, WISE, SOFIA) to discover episodic accretion events and monitor their evolution (Fischer et al. 2012; Safron et al. 2015). Using infrared surveys, both past and proposed, to broadly understand the importance of episodic accretion for stellar mass assembly (Fischer et al. 2019; Zakri et al. 2022; Fischer et al. 2024).
 

Review from Protostars and Planets VII: Fischer et al. 2022

Infrared/submillimeter investigations of protostellar evolution – a cross-disciplinary program including observations from the JWST, Herschel, Spitzer, SOFIA, and ALMA observatories modeled with several radiative transfer codes (including LIME and COLT) to study the morphology and chemical properties of young systems. e.g., Federman et al. 2024, Yang et al. (2017, 2018)

 

Spectroscopic characterization of physical conditions in outbursting disks – Using mid-infrared spectroscopy from Spitzer and now SOFIA to monitor the luminosity and chemical evolution of episodic accretion events. e.g., Green et al. (2016, 2013)

Modeling HI line emission - Kwan & Fischer (2011). A database of line models can be found at http://www.stsci.edu/~wfischer/line_models.html

Calibration of mid-IR lines for use in measuring accretion rates with JWST spectroscopy – JWST will provide an unprecedented opportunity for near to mid-IR spectroscopy of accreting young stars. The luminosities of emission lines in their spectra are proportional to their accretion rates. We are calibrating the proportionality relationships with ground-based spectra.

 

Mapping interstellar shocks – an observational program to study the impact of jets and outflows on the surrounding molecular cloud with HST, Spitzer, IRTF, and JWST. e.g., Sonnentrucker et al. (2010, 2006); Green et al. (2011)

Far-IR Future Missions - Whitepapers on PRIMA (Fischer et al. 2023) and Origins (Green et al. 2019)

Obs Hours
Title
SPF PI and co-Is
PID
30.5
Coronagraphic Imaging of Scattered light Debris Disks
C. Chen
1183
29.2
NGC 346: Star Formation at Low Metallicity in the Small Magellanic Cloud
T. Beck, J. Muzerolle, M. Robberto, B. Sargent
1227
16.1
Planets in Formation and Exozodiacal Disks
C. Chen
1242
8.9
Thermal Emission Spectroscopy of beta Pictoris' Prototypical Debris Disk
PI C. Chen; B. Sargent
1294
32.8
IceAge: Chemical evolution of ices during star formation
T. Beck
1309
13.8
The deepest search for rare molecules and isotopologues in planet-forming disks
J. Green, T. Pauly, N. Arulanantham
1549
34.9
Icy Kuiper Belts in Exoplanetary Systems
PI C. Chen; T. Beck
1563
28.0
A DSHARP-MIRI Treasury survey of Chemistry in Planet-forming Regions
N. Arulanantham, J. Green
1584
15.8
A chemical census of volatile ices in protostellar envelopes
T. Pauly
1611
15.2
Testing the emerging paradigm of wind-driven accretion with NIRSpec spectro-imaging
T. Beck
1621
19.6
The infrared water spectrum as a tracer of pebble delivery to rocky planets
J. Green, N. Arulanantham
1640
25.0
Mapping inclined disk astrochemical signatures (MIDAS)
T. Beck
1751
7.7
Characterizing Accretion Signatures in the Youngest Protostars: The Case of L1527 IRS
W. Fischer
1798
66.3
Investigating Protostellar Accretion Across the Mass Spectrum
W. Fischer, J. Green, J. Muzerolle
1802
25.1
NAOMY-J: NIR-dark Accretion Outbursts from Massive Young stellar objects with JWST
Admin PI J. Green
1906
14.3
The Chemistry of Planet Formation: A JWST-ALMA Survey of 4 Planet-Forming Disks
J. Green
2025
6.0
Search for NIR gas in debris disks. Is there a water delivery mechanism?
C. Chen
2053
24.7
Blazing the trail of COMs from ice to gas
J. Green
2151
30.9
Illuminating the dust properties in the diffuse ISM with JWST
J. Green
2183
1.7
Preparing for planets: the impact of the extraordinary outburst of EX Lup on its circumstellar disk
J. Green
2209
6.4
EPISODE: EC 53, the only known Periodically variable Infant Star to chase the Outburst in the next Dynamical Event
Admin PI: J. Green
3477
32
The Volatile Content of Oort Cloud Comet C/2014 UN271 (multi-cycle)
C. Chen, J. Green
4198, 2747

STAR & PLANET FORMATION

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