Search Publications
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…
Migratory Outbursting Quasi-Hilda Object 282P/(323137) 2003 BM80
Chandler, Colin Orion; Trujillo, Chadwick A.; Oldroyd, William J.
We report that object 282P/(323137) 2003 BM80 is undergoing a sustained activity outburst, lasting over 15 months thus far. These findings stem in part from our NASA Partner Citizen Science project Active Asteroids (http://activeasteroids.net), which we introduce here. We acquired new observations of 282P via our observing campaign (Vat…
High-resolution, High-sensitivity, Low-frequency uGMRT View of Coma Cluster of Galaxies
Brunetti, G.; Venturi, T.; Churazov, E. M. +12 more
We present high-resolution, high-sensitivity upgraded Giant Metrewave Radio Telescope observations of the Coma cluster (A1656) at 250-500 MHz and 550-850 MHz. At 250-500 MHz, 135 sources have extensions >0.'45 (with peak-to-local-noise ratio >4). Of these, 24 sources are associated with Coma-member galaxies. In addition, we supplement this s…
A Study of Sunspot 3 Minute Oscillations Using ALMA and GST
Yurchyshyn, Vasyl; Gary, Dale E.; Reardon, Kevin P. +1 more
Waves and oscillations are important solar phenomena, not only because they can propagate and dissipate energy in the chromosphere, but also because they carry information about the structure of the atmosphere in which they propagate. The nature of the 3 minute oscillations observed in the umbral region of sunspots is considered to be an effect of…
Two New Black Widow Millisecond Pulsars in M28
Cadelano, Mario; Pallanca, Cristina; Ransom, Scott M. +18 more
We report the discovery of two Black Widow millisecond pulsars in the globular cluster (GC) M28 with the MeerKAT telescope. PSR J1824-2452M (M28M) is a 4.78 ms pulsar in a 5.82 hr orbit, and PSR J1824-2452N (M28N) is a 3.35 ms pulsar in a 4.76 hr orbit. Both pulsars have dispersion measures near 119.30 pc cm-3 and have low-mass companio…