Search Publications
A kinematically detected planet candidate in a transition disk
Testi, L.; Ansdell, M.; Facchini, S. +10 more
Context. Transition disks are protoplanetary disks with inner cavities possibly cleared by massive companions. Observing them at high resolution is ideal for mapping their velocity structure and probing companion-disk interactions.
Aims: We present Atacama Large Millimeter/submillimeter Array (ALMA) Band 6 dust and gas observations of the tra…
Planetary system around LTT 1445A unveiled by ESPRESSO: Multiple planets in a triple M-dwarf system
Bouchy, F.; Rebolo, R.; Allende Prieto, C. +32 more
We present radial velocity follow-up obtained with ESPRESSO of the M-type star LTT 1445A (TOI-455), for which a transiting planet b with an orbital period of 5.4 days was detected by TESS. We report the discovery of a second transiting planet (LTT 1445A c) and a third non-transiting candidate planet (LTT 1445A d) with orbital periods of 3.12 and 2…
An Anisotropic Density Turbulence Model from the Sun to 1 au Derived from Radio Observations
Kontar, Eduard P.; Chen, Xingyao; Chrysaphi, Nicolina +5 more
Solar radio bursts are strongly affected by radio-wave scattering on density inhomogeneities, changing their observed time characteristics, sizes, and positions. The same turbulence causes angular broadening and scintillation of galactic and extragalactic compact radio sources observed through the solar atmosphere. Using large-scale simulations of…
JWST's PEARLS: TN J1338-1942 - I. Extreme jet-triggered star formation in a z = 4.11 luminous radio galaxy
Grogin, Norman A.; Holwerda, Benne W.; Hutchison, Taylor A. +25 more
We present the first JWST observations of the z = 4.11 luminous radio galaxy TN J1338-1942, obtained as part of the 'Prime Extragalactic Areas for Reionization and Lensing Science' ('PEARLS') project. Our NIRCam observations, designed to probe the key rest-frame optical continuum and emission line features at this redshift, enable resolved spectra…
CHRONOSTAR - II. Kinematic age and substructure of the Scorpius-Centaurus OB2 association
Žerjal, Maruša; Ireland, Michael J.; Krumholz, Mark R. +2 more
The nearest region of massive star formation - the Scorpius-Centaurus OB2 association (Sco-Cen) - is a local laboratory ideally suited to the study of a wide range of astrophysical phenomena. Precision astrometry from the Gaia mission has expanded the census of this region by an order of magnitude. However, Sco-Cen's vastness and complex substruct…
Reading the tea leaves in the Mbh-M*,sph and Mbh-Re,sph diagrams: dry and gaseous mergers with remnant angular momentum
Graham, Alister W.; Sahu, Nandini
We recently revealed that bulges and elliptical galaxies broadly define distinct, superlinear relations in the (black hole mass, Mbh)-(spheroid stellar mass, M*,sph) diagram or Mbh-M*,sph diagram, with the order-of-magnitude lower Mbh/M*,sph ratios in the elliptical galaxies due to …
Stellar Rotation and Structure of the α Persei Complex: When Does Gyrochronology Start to Work?
Bouma, Luke G.; Boyle, Andrew W.
On the pre-main sequence, the rotation rates of Sun-like stars are dictated by the interplay between the protostellar disk and the star's contraction. At ages exceeding 100 Myr, magnetic spindown erases the initial stellar spin rate and enables rotation-based age dating (gyrochronology). The exact time at which the transition between these two reg…
A Candidate Runaway Supermassive Black Hole Identified by Shocks and Star Formation in its Wake
van den Bosch, Frank C.; van Dokkum, Pieter; Romanowsky, Aaron J. +13 more
The interaction of a runaway supermassive black hole (SMBH) with the circumgalactic medium (CGM) can lead to the formation of a wake of shocked gas and young stars behind it. Here we report the serendipitous discovery of an extremely narrow linear feature in Hubble Space Telescope (HST) Advanced Camera for Surveys images that may be an example of …
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Releases 6 to 9
Yao, Su; Jin, Jun-Jie; Wu, Xue-Bing +10 more
We report the fourth installment in the series of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) quasar survey, which includes quasars observed between 2017 September and 2021 June. There are in total 13,066 quasars reliably identified, of which 6685 are newly discovered that are not reported in the Sloan Digital Sky Survey…
Quantifying the energy balance between the turbulent ionised gas and young stars
Leroy, Adam K.; Meidt, Sharon E.; Glover, Simon C. O. +19 more
Context. Stellar feedback is a key contributor to the morphology and dynamics of the interstellar medium in star-forming galaxies. In particular, energy and momentum input from massive stars can drive the turbulent motions in the gas, but the dominance and efficiency of this process are unclear. The study of ionised superbubbles enables quantitati…