Search Publications
A tale of caution: the tails of NGC 752 are much longer than claimed
Wang, Long; Boffin, Henri M. J.; Jerabkova, Tereza +1 more
Understanding the exact extent and content of tidal tails of open clusters provides useful clues on how field stars populate the Milky Way. We reanalyse, using Gaia EDR3 data, the tails around the open cluster NGC 752. Compared to previous analyses, we look at a much wider region around the cluster and use first the convergent point method, couple…
A NICER look at thermonuclear X-ray bursts from Aql X-1
Göğüş, Ersin; Chakrabarty, Deepto; Guillot, Sebastien +8 more
We present spectral and temporal properties of all the thermonuclear X-ray bursts observed from Aql X-1 by the Neutron Star Interior and Composition Explorer (NICER) between 2017 July and 2021 April. This is the first systematic investigation of a large sample of type I X-ray bursts from Aql X-1 with improved sensitivity at low energies. We detect…
Can Gaia find planets around white dwarfs?
Bonsor, Amy; Sanderson, Hannah; Mustill, Alexander
The Gaia spacecraft presents an unprecedented opportunity to reveal the population of long period (a > 1 au) exoplanets orbiting stars across the H-R diagram, including white dwarfs. White dwarf planetary systems have played an important role in the study of planetary compositions, from their unique ability to provide bulk elemental abundances …
Wind properties of Milky Way and SMC massive stars: empirical Z dependence from CMFGEN models
Bouret, J. -C.; Vink, J. S.; Bernini-Peron, M. +2 more
Detailed knowledge about stellar winds and evolution at different metallicities is crucial for understanding stellar populations and feedback in the Local Group of galaxies and beyond. Despite efforts in the literature, we still lack a comprehensive, empirical view of the dependence of wind properties on metallicity (Z). Here, we investigate the w…
A gravitational and dynamical framework of star formation: the Orion nebula
Stassun, Keivan G.; Kounkel, Marina; Hartmann, Lee +1 more
The Orion Nebula Cluster (ONC) is the most massive region of active star formation within a kpc of the Sun. Using Gaia DR3 parallaxes and proper motions, we examine the bulk motions of stars radially and tangentially relative to the cluster centre. We find an age gradient with distance to the stars in the ONC, from 385 pc for the oldest stars, to …
The signature of large-scale turbulence driving on the structure of the interstellar medium
Robitaille, Jean-François; Glover, Simon C. O.; Klessen, Ralf S. +9 more
The mechanisms that maintain turbulence in the interstellar medium (ISM) are still not identified. This work investigates how we can distinguish between two fundamental driving mechanisms: the accumulated effect of stellar feedback versus the energy injection from galactic scales. We perform a series of numerical simulations describing a stratifie…
Probing the Galactic halo with RR Lyrae stars - II. The substructures of the Milky Way
Huang, Y.; Zhang, H. -W.; Zhang, L. +4 more
We identify substructures of the Galactic halo using 3003 type ab RR Lyrae stars with six-dimensional position-velocity information from the Sloan Digital Sky Survey, the Large Sky Area Multi-Object Fiber Spectroscopic Telescope and the Gaia Early Data Release 3. Based on this information, we define the separation of any two of the stars in the in…
The MBHBM⋆ Project - II. Molecular gas kinematics in the lenticular galaxy NGC 3593 reveal a supermassive black hole
Baba, Shunsuke; Imanishi, Masatoshi; Neumayer, Nadine +15 more
As part of the Measuring Black Holes in below Milky Way-mass (M⋆) galaxies (MBHBM⋆) Project, we present a dynamical measurement of the supermassive black hole (SMBH) mass in the nearby lenticular galaxy NGC 3593, using cold molecular gas 12CO(2-1) emission observed at an angular resolution of ≈0${_{.}^{\prime\prime…
Validation of TESS exoplanet candidates orbiting solar analogues in the all-sky PLATO input catalogue
Piotto, Giampaolo; Wilson, Thomas G.; Collier Cameron, Andrew +6 more
The Transiting Exoplanet Survey Satellite (TESS) is focusing on relatively bright stars and has found thousands of planet candidates. However, mainly because of the low spatial resolution of its cameras (≈ 21 arcsec/pixel), TESS is expected to detect several false positives (FPs); hence, vetting needs to be done. Here, we present a follow-up progr…
Energetic transients joint analysis system for multi-INstrument (ETJASMIN) for GECAM - I. Positional, temporal, and spectral analyses
Gao, Min; Gong, Ke; Qiao, Rui +67 more
Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a dedicated mission, launched in December 2020, for gamma-ray transients, including gamma-ray bursts (GRBs) and soft gamma repeater (SGR) bursts in the multimessenger and multiwavelength astronomy era. Since GECAM consists of two independent spacecrafts (or say i…