Search Publications
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High-contrast Imaging of the Exoplanet HIP 65426 b from 2 to 16 µm
Henning, Thomas; Fortney, Jonathan J.; Carter, Aarynn L. +108 more
We present JWST Early Release Science coronagraphic observations of the super-Jupiter exoplanet, HIP 65426b, with the Near-Infrared Camera (NIRCam) from 2 to 5 µm, and with the Mid-Infrared Instrument (MIRI) from 11 to 16 µm. At a separation of ~0.″82 (87 ${}_{-31}^{+108}$ au), HIP 65426b is clearly detected in all seven of our observa…
Patchy Forsterite Clouds in the Atmospheres of Two Highly Variable Exoplanet Analogs
Marley, Mark; Faherty, Jacqueline K.; Morley, Caroline V. +12 more
We present an atmospheric retrieval analysis of a pair of highly variable, ~200 Myr old, early T type planetary-mass exoplanet analogs SIMP J01365662+0933473 and 2MASS J21392676+0220226 using the Brewster retrieval framework. Our analysis, which makes use of archival 1-15 µm spectra, finds almost identical atmospheres for both objects. For b…
GOALS-JWST: Small Neutral Grains and Enhanced 3.3 µm PAH Emission in the Seyfert Galaxy NGC 7469
Inami, Hanae; Böker, Torsten; Law, David R. +37 more
We present James Webb Space Telescope (JWST) Near Infrared Spectrograph (NIRSpec) integral field spectroscopy of the nearby luminous infrared galaxy NGC 7469. We take advantage of the high spatial/spectral resolution and wavelength coverage of JWST/NIRSpec to study the 3.3 µm neutral polycyclic aromatic hydrocarbon (PAH) grain emission on ~2…
Corrected SFD: A More Accurate Galactic Dust Map with Minimal Extragalactic Contamination
Chiang, Yi-Kuan
The widely used Milky Way dust-reddening map, the Schlegel-Finkbeiner-Davis (SFD) map, was found to contain extragalactic large-scale structure (LSS) imprints. Such contamination is inherent in maps based on infrared emission, which pick up not only Galactic dust but also the cosmic infrared background (CIB). When SFD is used for extinction correc…
GOALS-JWST: Revealing the Buried Star Clusters in the Luminous Infrared Galaxy VV 114
Inami, Hanae; Böker, Torsten; Kemper, Francisca +30 more
We present the results of a James Webb Space Telescope NIRCam investigation into the young massive star cluster (YMC) population in the luminous infrared galaxy VV 114. We identify 374 compact YMC candidates with signal-to-noise ratios ≥ 3, 5, and 5 at F150W, F200W, and F356W, respectively. A direct comparison with our HST cluster catalog reveals …
A New Study on a Type Iax Stellar Remnant and its Probable Association with SN 1181
Hillier, D. John; Parker, Quentin A.; Ritter, Andreas +4 more
We report observations and modeling of the stellar remnant and presumed double-degenerate merger of Type Iax supernova Pa 30, which is the probable remnant of SN 1181 AD. It is the only known bound stellar SN remnant and the only star with Wolf-Rayet features that is neither a planetary nebula central star nor a massive Population I progenitor. We…
Demographics of Protoplanetary Disks: A Simulated Population of Edge-on Systems
Perrin, Marshall D.; Ménard, François; Angelo, Isabel +9 more
The structure of protoplanetary disks plays an essential role in planet formation. A disk that is highly inclined, or "edge-on," is of particular interest since its geometry provides a unique opportunity to study the disk's vertical structure and radial extent. Candidate edge-on protoplanetary disks are typically identified via their unique spectr…
V445 Puppis: Dustier than a Thousand Novae
Evans, A.; Banerjee, D. P. K.; Starrfield, S. +4 more
V445 Puppis, the only known Galactic helium nova, is a unique test bed to verify supernova (SN) theories in the single-degenerate channel that involve a white dwarf (WD) accreting matter from a helium-rich donor. An estimate of the mass of the helium shell on the WD is crucial to deciding whether or not it will undergo an SN detonation. In this co…
Unraveling the Complex Structure of AGN-driven Outflows. VI. Strong Ionized Outflows in Type 1 AGNs and the Outflow Size-Luminosity Relation
Luo, Rongxin; Chung, Aeree; Baek, Junhyun +4 more
We present spatially resolved gas kinematics, ionization, and energetics of 11 type 1 and 5 type 2 active galactic nuclei (AGNs) with strong ionized gas outflows at z <0.3 using Gemini Multi-Object Spectrograph Integral Field Unit data. We find a strongly blueshifted region in [O III] velocity maps, representing an approaching cone in biconical…
RNO 54: A Previously Unappreciated FU Ori Star
De, Kishalay; van Roestel, Jan; Hillenbrand, Lynne A. +1 more
We present evidence in support of the hypothesis that the young stellar object RNO 54 is a mature-stage FU Ori type source. The star was first cataloged as a "red nebulous object" in the 1980s but appears to have undergone its outburst prior to the 1890s. Present-day optical and near-infrared spectra are consistent with those of other FU Ori-type …