Search Publications
The VLA Frontier Field Survey: A Comparison of the Radio and UV/Optical Size of 0.3 ≲ z ≲ 3 Star-forming Galaxies
Smail, I.; Dickinson, M.; Jiménez-Andrade, E. F. +6 more
To investigate the growth history of galaxies, we measure the rest-frame radio, ultraviolet (UV), and optical sizes of 98 radio-selected, star-forming galaxies (SFGs) distributed over 0.3 ≲ z ≲ 3 with a median stellar mass of $\mathrm{log}({M}_{\star }/{M}_{\odot })\approx 10.4$ . We compare the size of galaxy stellar disks, traced by rest-frame o…
SunCET: The Sun Coronal Ejection Tracker Concept
Veronig, Astrid M.; Dissauer, Karin; Chamberlin, Phillip C. +16 more
The Sun Coronal Ejection Tracker (SunCET) is an extreme ultraviolet imager and spectrograph instrument concept for tracking coronal mass ejections through the region where they experience the majority of their acceleration: the difficult-to-observe middle corona. It contains a wide field of view (0-4 R⊙) imager and a 1 Å spectral-resolu…
Testing abundance-age relations beyond solar analogues with Kepler LEGACY stars
Miglio, Andrea; Montalbán, Josefina; Morel, Thierry +2 more
The prospects of using abundance ratios as stellar age indicators appear promising for solar analogues, but the usefulness of this technique for stars spanning a much wider parameter space remains to be established. We present abundances of 21 elements in a sample of 13 bright FG dwarfs drawn from the Kepler LEGACY sample to examine the applicabil…
Exploring the dust content of galactic haloes with Herschel III. NGC 891
Veilleux, S.; Martin, Crystal L.; Gordon, K. D. +6 more
We present deep far-infrared observations of the nearby edge-on galaxy NGC 891 obtained with the Herschel Space Observatory and the Spitzer Space Telescope. The maps confirm the detection of thermal emission from the inner circumgalactic medium (halo) and spatially resolve a dusty superbubble and a dust spur (filament). The dust temperature of the…
The Milky Way, coming into focus: Precision astrometry probes its evolution and its dark matter
Yanny, Brian; Gardner, Susan; McDermott, Samuel D.
The growing trove of precision astrometric observations from the Gaia space telescope and other surveys is revealing the structure and dynamics of the Milky Way in ever more exquisite detail. We summarize the current status of our understanding of the structure and the characteristics of the Milky Way, and we review the emerging picture: the Milky…
DR 21 South Filament: A Parsec-sized Dense Gas Accretion Flow onto the DR 21 Massive Young Cluster
Qiu, Keping; Li, Guangxing; Liu, Junhao +8 more
DR 21 south filament (DR21SF) is a unique component of the giant network of filamentary molecular clouds in the north region of the Cygnus X complex. Unlike the highly fragmented and star-forming active environment wherein it resides, DR21SF exhibits a coherent profile in the column density map with very few star formation signposts, even though t…
Three microlensing planets with no caustic-crossing features
Han, Cheongho; Udalski, Andrzej; Lee, Chung-Uk +31 more
Aims: We search for microlensing planets with signals exhibiting no caustic-crossing features, considering the possibility that such signals may be missed due to their weak and featureless nature.
Methods: For this purpose, we reexamine the lensing events found by the KMTNet survey before the 2019 season. From this investigation, we find…
TESS unveils the optical phase curve of KELT-1b. Thermal emission and ellipsoidal variation from the brown dwarf companion along with the stellar activity
Mallonn, M.; Agol, E.; von Essen, C. +8 more
We present the detection and analysis of the phase curve of KELT-1b at optical wavelengths, analyzing data taken by the Transiting Exoplanet Survey Satellite (TESS) during cycle 2 and sector 17. With a mass of ~27 MJup, KELT-1b is an example of a low-mass brown dwarf. Due to the high mass and close proximity of its companion, the host s…
Dispersal timescale of protoplanetary disks in the low-metallicity young cluster Dolidze 25
Neiner, C.; Micela, G.; Sciortino, S. +7 more
Context. The dispersal of protoplanetary disks sets the timescale that is available for planets to assemble, and thus it is one of the fundamental parameters in theories of planetary formation. Disk dispersal is determined by several properties of the central star, the disk itself, and the surrounding environment. In particular, the metallicity of…
Low-mass compact elliptical galaxies: spatially resolved stellar populations and kinematics with the Keck Cosmic Web Imager
Forbes, Duncan A.; Romanowsky, Aaron J.; Brodie, Jean P. +4 more
We present spatially resolved two-dimensional maps and radial trends of the stellar populations and kinematics for a sample of six compact elliptical galaxies (cE) using spectroscopy from the Keck Cosmic Web Imager (KCWI). We recover their star formation histories, finding that all except one of our cEs are old and metal rich, with both age and me…