Search Publications
Characterizing Compact 15-33 GHz Radio Continuum Sources in Local U/LIRGs
Sanders, D. B.; Inami, H.; Huang, X. +23 more
We present the analysis of ~100 pc scale compact radio continuum sources detected in 63 local (ultra)luminous infrared galaxies (U/LIRGs; L IR ≥ 1011 L ⊙), using FWHM ≲ 0.″1-0.″2 resolution 15 and 33 GHz observations with the Karl G. Jansky Very Large Array. We identify a total of 133 compact radio sources with eff…
The Sloan Digital Sky Survey Reverberation Mapping Project: UV-Optical Accretion Disk Measurements with the Hubble Space Telescope
Trump, Jonathan R.; Brandt, W. N.; Shen, Yue +10 more
We present accretion-disk structure measurements from UV-optical reverberation mapping (RM) observations of a sample of eight quasars at 0.24 < z < 0.85. Ultraviolet photometry comes from two cycles of Hubble Space Telescope monitoring, accompanied by multiband optical monitoring by the Las Cumbres Observatory network and Liverpool Telescope…
Acceleration of Solar Energetic Particles through CME-driven Shock and Streamer Interaction
Susino, Roberto; West, Matthew J.; Frassati, Federica +5 more
On 2013 June 21, a solar prominence eruption was observed, accompanied by an M2.9 class flare, a fast coronal mass ejection, and a type II radio burst. The concomitant emission of solar energetic particles (SEPs) produced a significant proton flux increase, in the energy range 4-100 MeV, measured by the Low and High Energy Telescopes on board the …
Damped Lyα Absorbers in Star-forming Galaxies at z < 0.15 Detected with the Hubble Space Telescope and Implications for Galactic Evolution
Bowen, David V.; Noterdaeme, Pasquier; York, Donald G. +4 more
We report Hubble Space Telescope Cosmic Origins Spectrograph spectroscopy of 10 quasars with foreground star-forming galaxies at 0.02 < z < 0.14 within impact parameters of ~1-7 kpc. We detect damped/sub-damped Lyα (DLA/sub-DLA) absorption in 100% of cases where no higher-redshift Lyman-limit systems extinguish the flux at the expected wavel…
Hard X-Ray Emission from the Eastern Jet of SS 433 Powering the W50 "Manatee" Nebula: Evidence for Particle Reacceleration
Mori, Kaya; Safi-Harb, Samar; Zhang, Shuo +12 more
We present a broadband X-ray study of W50 (the "Manatee" nebula), the complex region powered by the microquasar SS 433, that provides a test bed for several important astrophysical processes. The W50 nebula, a Galactic PeVatron candidate, is classified as a supernova remnant but has an unusual double-lobed morphology likely associated with the jet…
Formation of the SDC13 Hub-filament System: A Cloud-Cloud Collision Imprinted on the Multiscale Magnetic Field
Wang, Jia-Wei; Koch, Patrick M.; Peretto, Nicolas +6 more
Hub-filament systems (HFSs) are potential sites of protocluster and massive star formation, and play a key role in mass accumulation. We report JCMT POL-2 850 µm polarization observations toward the massive HFS SDC13. We detect an organized magnetic field near the hub center with a cloud-scale "U-shape" morphology following the western edge …
Possible Ongoing Merger Discovered by Photometry and Spectroscopy in the Field of the Galaxy Cluster PLCK G165.7+67.0
Frye, Brenda L.; Conselice, Christopher J.; Yan, Haojing +17 more
We present a detailed study of the Planck-selected binary galaxy cluster PLCK G165.7+67.0 (G165; z = 0.348). A multiband photometric catalog is generated incorporating new imaging from the Large Binocular Telescope/Large Binocular Camera and Spitzer/IRAC to existing imaging. To cope with the different image characteristics, robust methods are appl…
The Environmental Dependence of Gas Properties in Dense Cores of a Protocluster at z 2.5 Revealed with ALMA
Suzuki, Tomoko L.; Koyama, Yusei; Kodama, Tadayuki +5 more
In a protocluster USS1558-003 at z = 2.53, galaxies in the dense cores show systematically elevated star-forming activity compared to those in less dense regions. To understand its origin, we look into the gas properties of the galaxies in the dense cores by conducting deep 1.1 mm observations with the Atacama Large Millimeter/submillimeter Array.…
A First Look at Cepheids in a Type Ia Supernova Host with JWST
Casertano, Stefano; Riess, Adam G.; Yuan, Wenlong +1 more
We report the first look at extragalactic Cepheid variables with the James Webb Space Telescope (JWST), obtained from an archival observation of NGC 1365, host of SNIa 2012fr, a calibration path used to measure the Hubble constant. As expected, the high-resolution observations with NIRCam through F200W show better source separation from line-of-si…
Revealing the Field Sub-subgiant Population Using a Catalog of Active Giant Stars and Gaia EDR3
Tofflemire, Benjamin M.; Gully-Santiago, Michael A.; Geller, Aaron M. +2 more
Sub-subgiant stars (SSGs) fall below the subgiant branch and/or red of the giant branch in open and globular clusters, an area of the color-magnitude diagram (CMD) not populated by standard stellar evolution tracks. One hypothesis is that SSGs result from rapid rotation in subgiants or giants due to tidal synchronization in a close binary. The str…