Search Publications
Small and Large Dust Cavities in Disks around Mid-M Stars in Taurus
Pascucci, Ilaria; Herczeg, Gregory J.; Johnstone, Doug +10 more
High angular resolution imaging by Atacama Large Millimeter/submillimeter Array (ALMA) has revealed the near universality and diversity of substructures in protoplanetary disks. However, disks around M-type pre-main-sequence stars are still poorly sampled, despite the prevalence of M dwarfs in the Galaxy. Here we present high-resolution (∼50 mas, …
Probing the Spectrum of the Magnetar 4U 0142+61 with JWST
Temim, Tea; Pavlov, George G.; Kargaltsev, Oleg +3 more
JWST observed the magnetar 4U 0142+61 with the Mid-Infrared Instrument (MIRI) and Near Infrared Camera (NIRCam) instruments within a 77 minute time interval on 2022 September 20–21. The low-resolution MIRI spectrum and NIRCam photometry show that the spectrum in the wavelength range 1.4–11 µm range can be satisfactorily described by an absor…
Calibrating Nonparametric Morphological Indicators from JWST Images for Galaxies over 0.5 < z < 3
Li, Yubin; Zheng, Xian Zhong; Cui, Qifan +6 more
The measurements of morphological indicators of galaxies are often influenced by a series of observational effects. In this study, we utilize a sample of 832 TNG50 simulated galaxies with log(M */M ⊙)> 9 at 0.5 < z < 3 to investigate the differences in nonparametric morphological indicators (C, A, Gini, M 20
An Extensive Hubble Space Telescope Study of the Offset and Host Light Distributions of Type I Superluminous Supernovae
Berger, Edo; Gomez, Sebastian; Blanchard, Peter K. +1 more
We present an extensive Hubble Space Telescope rest-frame UV imaging study of the locations of Type I superluminous supernovae (SLSNe) within their host galaxies. The sample includes 65 SLSNe with detected host galaxies in the redshift range z ≈ 0.05–2. Using precise astrometric matching with SN images, we determine the distributions of the physic…
AGN STORM 2. V. Anomalous Behavior of the C IV Light Curve of Mrk 817
Treu, Tommaso; Kaspi, Shai; Hall, Patrick B. +49 more
An intensive reverberation mapping campaign of the Seyfert 1 galaxy Mrk 817 using the Cosmic Origins Spectrograph on the Hubble Space Telescope revealed significant variations in the response of broad UV emission lines to fluctuations in the continuum emission. The response of the prominent UV emission lines changes over an ∼60 day duration, resul…
The Lyα Nondetection by JWST NIRSpec of a Strong Lyα Emitter at z = 5.66 Confirmed by MUSE
Kong, Xu; Cheng, Cheng; Boyett, Kristan +6 more
The detections of Lyα emission in galaxies with redshifts above 5 are of utmost importance for constraining the cosmic reionization timeline, yet such detections are usually based on slit spectroscopy. Here we investigate the significant bias induced by slit placement on the estimate of Lyα escape fraction (
The Environments of Fast Radio Bursts Viewed Using Adaptive Optics
Kilpatrick, Charles D.; Simha, Sunil; Prochaska, J. Xavier +10 more
We present observations from the Gemini Multi-Conjugate Adaptive Optics System/Gemini South Adaptive Optics Imager at Gemini South of five fast radio burst (FRB) host galaxies of FRBs with subarcsecond localizations. We examine and quantify the spatial distributions and locations of the FRBs with respect to their host galaxy light distributions, f…
The CO-to-H2 Conversion Factor in the Barred Spiral Galaxy M83
Lee, Amanda M.; Koda, Jin; Hirota, Akihiko +2 more
We analyze the CO-to-H2 conversion factor (α CO) in the nearby barred spiral galaxy M83. We present new H I observations from the VLA and single-dish GBT in the disk of the galaxy, and combine them with maps of CO(1-0) integrated intensity and dust surface density from the literature. α CO and the gas-to-dust ratio…
A Potential Second Shutoff from AT2018fyk: An Updated Orbital Ephemeris of the Surviving Star under the Repeating Partial Tidal Disruption Event Paradigm
Wevers, T.; Coughlin, E. R.; Hinkle, Jason T. +4 more
The tidal disruption event (TDE) AT2018fyk showed a rapid dimming event 500 days after discovery, followed by a rebrightening roughly 700 days later. It has been hypothesized that this behavior results from a repeating partial TDE (rpTDE), such that prompt dimmings/shutoffs are coincident with the return of the star to pericenter and rebrightening…
An X-Ray and Radio View of the 2022 Reactivation of the Magnetar SGR J1935+2154
Campana, S.; Tiengo, A.; Götz, D. +19 more
Recently, the Galactic magnetar SGR J1935+2154 has garnered attention due to its emission of an extremely luminous radio burst, reminiscent of fast radio bursts (FRBs). SGR J1935+2154 is one of the most active magnetars, displaying flaring events nearly every year, including outbursts as well as short and intermediate bursts. Here, we present our …