Search Publications
CSST WL preparation I: forecast the impact from non-Gaussian covariances and requirements on systematics control
Hu, Bin; Li, Nan; Fan, Zuhui +11 more
The precise estimation of the statistical errors and accurate removal of the systematical errors are the two major challenges for the stage IV cosmic shear surveys. We explore their impact for the China Space Station Telescope (CSST) with survey area ${\sim} 17\,500\deg ^2$ up to redshift ~4. We consider statistical error contributed from Gaussian…
Image Deconvolution and Point-spread Function Reconstruction with STARRED: A Wavelet-based Two-channel Method Optimized for Light-curve Extraction
Marshall, Philip J.; Courbin, Frédéric; Millon, Martin +2 more
We present STARRED, a point-spread function (PSF) reconstruction, two-channel deconvolution, and light-curve extraction method designed for high-precision photometric measurements in imaging time series. An improved resolution of the data is targeted rather than an infinite one, thereby minimizing deconvolution artifacts. In addition, STARRED perf…
A catalogue of low-mass X-ray binaries in the Galaxy: From the INTEGRAL to the Gaia era
Chaty, S.; García, F.; Fortin, F. +2 more
Context. Low-mass X-ray binaries (LMXBs) are high-energy sources that require multi-wavelength follow-up campaigns to be fully characterised. New transients associated with LMXBs are regularly discovered, and previously known systems are often revisited by astronomers to constrain their intrinsic parameters. All of this information compiled into a…
Inhomogeneous terminators on the exoplanet WASP-39 b
Carter, Aarynn L.; Helling, Christiane; Mayne, Nathan +40 more
Transmission spectroscopy has been a workhorse technique used over the past two decades to constrain the physical and chemical properties of exoplanet atmospheres1–5. One of its classical key assumptions is that the portion of the atmosphere it probes—the terminator region—is homogeneous. Several works from the past decade, however, hav…
jetsimpy: A Highly Efficient Hydrodynamic Code for Gamma-Ray Burst Afterglow
Wang, Hao; Dastidar, Ranadeep G.; Giannios, Dimitrios +1 more
Gamma-ray burst (GRB) afterglows are emissions from ultrarelativistic blast waves produced by a narrow jet interacting with surrounding matter. Since the first multimessenger observation of a neutron star merger, hydrodynamic modeling of GRB afterglows for structured jets with smoothly varying angular energy distributions has gained increased inte…
Many Roads Lead to Lithium: Formation Pathways For Lithium-rich Red Giants
Bedell, Megan; Casey, Andrew R.; Buder, Sven +8 more
Stellar models predict that lithium (Li) inside a star is destroyed during the first dredge-up phase, yet 1.2% of red giant stars are Li-rich. We aim to uncover possible origins of this population, by analyzing 1099 Li-rich giants (A(Li) ≥ 1.5) in GALAH DR3. To expose peculiar traits of Li-rich stars, we construct a reference sample of Li-normal (…
MINDS. Hydrocarbons detected by JWST/MIRI in the inner disk of Sz28 consistent with a high C/O gas-phase chemistry
Henning, Thomas; Güdel, Manuel; Vandenbussche, Bart +20 more
Context. With the advent of JWST, we are acquiring unprecedented insights into the physical and chemical structure of the inner regions of planet-forming disks where terrestrial planet formation occurs. Very low-mass stars (VLMSs) are known to have a high occurrence of the terrestrial planets orbiting them. Exploring the chemical composition of th…
The Gaia-ESO Survey: 3D dynamics of young groups and clusters from GES and Gaia EDR3
Gilmore, G.; Franciosini, E.; Randich, S. +9 more
We present the first large-scale 3D kinematic study of $\sim$2700 spectroscopically confirmed young stars ($\lt $20 Myr) in 18 star clusters and OB associations (hereafter groups) from the combination of Gaia astrometry and Gaia-ESO Survey spectroscopy. We measure 3D velocity dispersions for all groups, which range from 0.61 to 7.4 km s$^{-1}…
The DESI Early Data Release white dwarf catalogue
Moustakas, J.; Brooks, D.; Doel, P. +51 more
The Early Data Release (EDR) of the Dark Energy Spectroscopic Instrument (DESI) comprises spectroscopy obtained from 2020 December 14 to 2021 June 10. White dwarfs were targeted by DESI both as calibration sources and as science targets and were selected based on Gaia photometry and astrometry. Here, we present the DESI EDR white dwarf catalogue, …
Two-dimensional Parameter Relationships for W UMa-type Systems Revisited
Poro, Atila; Paki, Ehsan; Hedayatjoo, Mahya +6 more
Reviewing the empirical and theoretical parameter relationships between various parameters is a good way to understand more about contact binary systems. In this investigation, two-dimensional (2D) relationships for P-M V(system), P-L 1,2, M 1,2-L 1,2, and q-L ratio were revisited. The sample…