Search Publications
Composite bulges - II. Classical bulges and nuclear discs in barred galaxies: the contrasting cases of NGC 4608 and NGC 4643
Beckman, John E.; Bender, Ralf; Drory, Niv +14 more
We present detailed morphological, photometric, and stellar-kinematic analyses of the central regions of two massive, early-type barred galaxies with nearly identical large-scale morphologies. Both have large, strong bars with prominent inner photometric excesses that we associate with boxy/peanut-shaped (B/P) bulges; the latter constitute ∼30 per…
The magnetic field across the molecular warped disk of Centaurus A
Lopez-Rodriguez, Enrique
Magnetic fields are amplified as a consequence of galaxy formation and turbulence-driven dynamos. Galaxy mergers can potentially amplify the magnetic fields from their progenitors, making the magnetic fields dynamically important. However, the effect of mergers on magnetic fields is still poorly understood. We use thermal polarized emission observ…
The Dark World: A Tale of WASP-43b in Reflected Light with HST WFC3/UVIS
Fortney, Jonathan J.; Stevenson, Kevin B.; Mayorga, L. C. +14 more
Optical reflected light eclipse observations provide a direct probe of exoplanet scattering properties, such as from aerosols. We present here the photometric reflected light observations of WASP-43b using the Hubble Space Telescope (HST) WFC3/UVIS instrument with the F350LP filter (346-822 nm) encompassing the entire optical band. This is the fir…
XMMU J050722.1-684758: discovery of a new Be X-ray binary pulsar likely associated with the supernova remnant MCSNR J0507-6847
Haberl, F.; Udalski, A.; Filipović, M. D. +5 more
We report the discovery of a new high-mass X-ray binary pulsar, XMMU J050722.1-684758, possibly associated with the supernova remnant (SNR) MCSNR J0507-6847 in the Large Magellanic Cloud, using XMM-NewtonX-ray observations. Pulsations with a periodicity of 570 s are discovered from the Be X-ray binary XMMU J050722.1-684758 confirming its nature as…
The Anatomy of an Unusual Edge-on Protoplanetary Disk. I. Dust Settling in a Cold Disk
Duchêne, Gaspard; Wolff, Schuyler G.; Perrin, Marshall D. +7 more
As the earliest stage of planet formation, massive, optically thick, and gas-rich protoplanetary disks provide key insights into the physics of star and planet formation. When viewed edge-on, high-resolution images offer a unique opportunity to study both the radial and vertical structures of these disks and relate this to vertical settling, radia…
Masses of White Dwarf Binary Companions to Type Ia Supernovae Measured from Runaway Velocities
Hermes, J. J.; Shen, Ken J.; Chandra, Vedant +1 more
The recently proposed "dynamically driven double-degenerate double-detonation" (D6) scenario posits that Type Ia supernovae (SNe) may occur during dynamically unstable mass transfer between two white dwarfs (WDs) in a binary. This scenario predicts that the donor WD may then survive the explosion and be released as a hypervelocity runaw…
A New Catalog of Asymptotic Giant Branch Stars in Our Galaxy
Suh, Kyung-Won
We present a new catalog of 11,209 O-rich asymptotic giant branch (AGB) stars and 7172 C-rich AGB stars in our Galaxy, identifying more AGB stars in the bulge component and considering more visual carbon stars. For each object, we cross-identify the Infrared Astronomical Satellite (IRAS), AKARI, Midcourse Space Experiment, Wide-field Infrared Surv…
Sixty Years of Element Abundance Measurements in Solar Energetic Particles
Reames, Donald V.
Sixty years ago the first observation was published showing solar energetic particles (SEPs) with a sampling of chemical elements with atomic numbers 6 ≤Z ≤18 above 40 MeV amu−1. Thus began study of the direct products of dynamic physics in the solar corona. As we have progressed from 4-min sounding-rocket samples to continuous satellit…
BALRoGO: Bayesian Astrometric Likelihood Recovery of Galactic Objects - Global properties of over one hundred globular clusters with Gaia EDR3
Vitral, Eduardo
We present BALRoGO: Bayesian Astrometric Likelihood Recovery of Galactic Objects, a public code to measure the centres, effective radii, and bulk proper motions of Milky Way (MW) globular clusters and Local Group dwarf spheroidals, whose data are mixed with MW field stars. Our approach presents innovative methods such as surface density fits allow…
First dust measurements with the Solar Orbiter Radio and Plasma Wave instrument
Maksimovic, M.; Bale, S. D.; Chust, T. +20 more
Context. Impacts of dust grains on spacecraft are known to produce typical impulsive signals in the voltage waveform recorded at the terminals of electric antennas. Such signals (as may be expected) are routinely detected by the Time Domain Sampler (TDS) system of the Radio and Plasma Waves (RPW) instrument on board Solar Orbiter.
Aims: We in…