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JWST/MIRI Spectroscopy of the Disk of the Young Eruptive Star EX Lup in Quiescence
Banzatti, Andrea; Henning, Thomas; Bouwman, Jeroen +7 more
EX Lup is a low-mass pre-main-sequence star that occasionally shows accretion-related outbursts. Here, we present JWST/MIRI medium-resolution spectroscopy obtained for EX Lup 14 yr after its powerful outburst. EX Lup is now in quiescence and displays a Class II spectrum. We detect a forest of emission lines from molecules previously identified in …
JWST: Deuterated PAHs, PAH Nitriles, and PAH Overtone and Combination Bands. I. Program Description and First Look
Boersma, C.; Bregman, J. D.; Allamandola, L. J. +6 more
A first look is taken at the NIRSpec 1-5 µm observations from James Webb Space Telescope program 1591 that targets seven objects along the low-mass stellar life cycle with polycyclic aromatic hydrocarbon (PAH) emission. Spectra extracted from a 1.″5 radius circular aperture are explored, showing a wealth of features, including the 3 µm…
Dissecting the Mid-infrared Heart of M83 with JWST
Kumari, Nimisha; Hirschauer, Alec S.; Hernandez, Svea +10 more
We present a first look at the MRS observations of the nucleus of the nearby galaxy M83, taken with MIRI on board JWST. The observations show a rich set of emission features from the ionized gas, warm molecular gas, and dust. To begin dissecting the complex processes in this part of the galaxy, we divide the observations into four different region…
The Mid-infrared Molecular Inventory toward Orion IRc2
Drozdovskaya, Maria N.; Herbst, Eric; Acharyya, Kinsuk +8 more
We present the first high spectral resolution mid-infrared survey in the Orion BN/KL region, covering 7.2–28.3 µm. With SOFIA/EXES, we target the enigmatic source Orion IRc2. While this is in the most prolifically studied massive star-forming region, longer wavelengths and molecular emission lines dominated previous spectral surveys. The mid…
Halfway to the Peak: Spatially Resolved Star Formation and Kinematics in a z = 0.54 Dusty Galaxy with JWST/MIRI
Veilleux, Sylvain; Ogle, Patrick; Alberts, Stacey +16 more
We present JWST Mid-InfraRed Instrument/Medium-Resolution Spectrometer (MIRI/MRS) observations of an infrared luminous disk galaxy, FLS1, at z ~ 0.54. With a lookback time of 5 Gyr, FLS1 is chronologically at the midpoint between the peak epoch of star formation and the present day. The MRS data provide maps of the atomic fine structure lines [Ar …
Raman Scattering by Atomic Hydrogen in Photodissociation Regions: An Alternative to the Polycyclic Aromatic Hydrocarbons Hypothesis
Zagury, Frédéric
Photodissociation regions (PDRs) illuminated by high temperature (T > 104 K) radiation fields display characteristic optical to midinfrared spectral features: emission bands that cluster around the blue limits of hydrogen series, an extended red emission (ERE) in the vicinity of Hα, and a continuum in the infrared part of the spectru…
High-resolution SOFIA/EXES Spectroscopy of Water Absorption Lines in the Massive Young Binary W3 IRS 5
Montiel, Edward; Neufeld, David; Indriolo, Nick +9 more
We present in this paper mid-infrared (5-8 µm) spectroscopy toward the massive young binary W3 IRS 5, using the Echelon Cross Echelle Spectrograph (EXES) spectrometer in high-resolution mode (R ~ 50,000) from the NASA Stratospheric Observatory for Infrared Astronomy (SOFIA). Many (~180) ν 2 = 1-0 and (~90) ν 2 = 2-1 abs…