Search Publications
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…
The Planetary Nebula in the 500 Myr Old Open Cluster M37
Parker, Quentin A.; Sabin, Laurence; Zijlstra, Albert A. +3 more
We report confirmation of a large, evolved, bipolar planetary nebula and its blue, white dwarf central star as a member of the ~500 Myr old Galactic open star cluster M37 (NGC 2099). This is only the third known example of a planetary nebula in a Galactic open cluster and was found via our ongoing program of identifying and studying planetary nebu…
Imaging Polarization of the Blue-excess Hot Dust-obscured Galaxy WISE J011601.41-050504.0
Stern, D.; Bauer, F. E.; Díaz-Santos, T. +8 more
We report on VLT/FORS2 imaging polarimetry observations in the R Special band of WISE J011601.41-050504.0 (W0116-0505), a heavily obscured hyperluminous quasar at z = 3.173 classified as a Hot Dust-obscured Galaxy (Hot DOG) based on its mid-IR colors. Recently, Assef et al. identified W0116-0505 as having excess rest-frame optical/UV em…
Local Spiral Structure Traced by Red Clump Stars
Xu, Ye; Hou, Ligang; Liu, Dejian +5 more
Using the cross-matched data of Gaia EDR3 and the Two Micron All Sky Survey Point Source Catalog, a sample of RC stars with parallax accuracies better than 20% is identified and used to reveal the nearby spiral pattern traced by old stars. As shown in the overdensity distribution of RC stars, there is an arc-like feature extending from l ~ 90° to …
Heliospheric Compression Due to Recent Nearby Supernova Explosions
Fields, Brian D.; Miller, Jesse A.
The widespread detection of 60Fe in geological and lunar archives provides compelling evidence for recent nearby supernova explosions within ~100 pc at 3 and 7 Myr ago. The blasts from these explosions had a profound effect on the heliosphere. We perform new calculations to study the compression of the heliosphere due to a supernova bla…
A Multiwavelength Study of ELAN Environments (AMUSE2). Mass Budget, Satellites Spin Alignment, and Gas Infall in a Massive z 3 Quasar Host Halo
Hennawi, Joseph F.; Prochaska, J. Xavier; Lusso, Elisabeta +14 more
The systematic targeting of extended Lyα emission around high-redshift quasars resulted in the discovery of rare and bright Enormous Lyα Nebulae (ELANe) associated with multiple active galactic nuclei (AGNs). We initiate here "a multiwavelength study of ELAN environments" (AMUSE2) focusing on the ELAN around the z ~ 3 quasar SDSS J1040+…
A Comparative Analysis of Machine-learning Models for Solar Flare Forecasting: Identifying High-performing Active Region Flare Indicators
Brandenburg, Axel; Nandy, Dibyendu; Srivastava, Nandita +9 more
Solar flares create adverse space weather impacting space- and Earth-based technologies. However, the difficulty of forecasting flares, and by extension severe space weather, is accentuated by the lack of any unique flare trigger or a single physical pathway. Studies indicate that multiple physical properties contribute to active region flare pote…