Search Publications
Observational constraints on dust disk sizes in tidally truncated protoplanetary disks in multiple systems in the Taurus region
Liu, Y.; Lodato, G.; van der Plas, G. +16 more
The impact of stellar multiplicity on the evolution of planet-forming disks is still the subject of debate. Here we present and analyze disk structures around ten multiple stellar systems that were included in an unbiased, high spatial resolution survey performed with ALMA of 32 protoplanetary disks in the Taurus star-forming region. At the unprec…
Kinematics of the Broad-line Region of 3C 273 from a 10 yr Reverberation Mapping Campaign
Ho, Luis C.; Smith, Paul S.; Zhang, Zhi-Xiang +9 more
Despite many decades of study, the kinematics of the broad-line region of 3C 273 are still poorly understood. We report a new, high signal-to-noise, reverberation mapping campaign carried out from 2008 November to 2018 March that allows the determination of time lags between emission lines and the variable continuum with high precision. The time l…
Sunyaev-Zel'dovich effect and X-ray scaling relations from weak lensing mass calibration of 32 South Pole Telescope selected galaxy clusters
Bayliss, M. B.; Schrabback, T.; von der Linden, A. +28 more
Uncertainty in mass-observable scaling relations is currently the limiting factor for galaxy-cluster-based cosmology. Weak gravitational lensing can provide direct mass calibration and reduce the mass uncertainty. We present new ground-based weak lensing observations of 19 South Pole Telescope (SPT) selected clusters at redshifts 0.29 ≤ z ≤ 0.61 a…
A 100-kiloparsec wind feeding the circumgalactic medium of a massive compact galaxy
Coil, Alison; Moustakas, John; Diamond-Stanic, Aleksandar M. +9 more
Ninety per cent of baryons are located outside galaxies, either in the circumgalactic or intergalactic medium1,2. Theory points to galactic winds as the primary source of the enriched and massive circumgalactic medium3-6. Winds from compact starbursts have been observed to flow to distances somewhat greater than ten kiloparse…
Explosive Magnetotail Activity
Khotyaintsev, Yuri; Velli, Marco; Runov, Andrei +13 more
Modes and manifestations of the explosive activity in the Earth's magnetotail, as well as its onset mechanisms and key pre-onset conditions are reviewed. Two mechanisms for the generation of the pre-onset current sheet are discussed, namely magnetic flux addition to the tail lobes, or other high-latitude perturbations, and magnetic flux evacuation…
The magnetic early B-type stars - III. A main-sequence magnetic, rotational, and magnetospheric biography
Wade, G. A.; Neiner, C.; Shultz, M. E. +10 more
Magnetic confinement of stellar winds leads to the formation of magnetospheres, which can be sculpted into centrifugal magnetospheres (CMs) by rotational support of the corotating plasma. The conditions required for the CMs of magnetic early B-type stars to yield detectable emission in H α - the principal diagnostic of these structures - are poorl…
Dynamics of cluster-forming hub-filament systems. The case of the high-mass star-forming complex Monoceros R2
Schneider, N.; Tremblin, P.; Didelon, P. +15 more
Context. High-mass stars and star clusters commonly form within hub-filament systems. Monoceros R2 (hereafter Mon R2), at a distance of 830 pc, harbors one of the closest of these systems, making it an excellent target for case studies.
Aims: We investigate the morphology, stability and dynamical properties of the Mon R2 hub-filament system. …
A Hot Saturn Orbiting an Oscillating Late Subgiant Discovered by TESS
Henning, Thomas; Smalley, Barry; Chaplin, William J. +139 more
We present the discovery of HD 221416 b, the first transiting planet identified by the Transiting Exoplanet Survey Satellite (TESS) for which asteroseismology of the host star is possible. HD 221416 b (HIP 116158, TOI-197) is a bright (V = 8.2 mag), spectroscopically classified subgiant that oscillates with an average frequency of about 430 µ…
A public relativistic transfer function model for X-ray reverberation mapping of accreting black holes
Ingram, Adam; García, Javier A.; Mastroserio, Guglielmo +3 more
We present the publicly available model RELTRANS that calculates the light-crossing delays and energy shifts experienced by X-ray photons originally emitted close to the black hole when they reflect from the accretion disc and are scattered into our line of sight, accounting for all general relativistic effects. Our model is fast and flexible enou…
Dynamical Confirmation of a Black Hole in MAXI J1820+070
Armas Padilla, M.; Jiménez-Ibarra, F.; Muñoz-Darias, T. +4 more
We present time-resolved 10.4 m Gran Telescopio Canarias and 4.2 m William Herschel Telescope intermediate resolution spectroscopy of the X-ray transient MAXI J1820+070 (=ASASSN-18ey) obtained during its decline to the quiescent state. Cross-correlation of the 21 individual spectra against late-type templates reveals a sinusoidal velocity modulati…