Search Publications
SPECIES. II. Stellar parameters of the EXPRESS giant star sample
Jones, M. I.; Soto, M. G.; Jenkins, J. S.
Context. As part of the search for planets around evolved stars, we can understand planet populations around significantly higher-mass stars than the Sun on the main sequence. This population is difficult to study any other way, such as using radial-velocities to measure planet masses and orbital mechanics, since the stars are too hot and rotate t…
Spectral analysis of the low-mass X-ray pulsar 4U 1822-371: Reflection component in a high-inclination system
Sanna, A.; Di Salvo, T.; Burderi, L. +6 more
Context. The X-ray source 4U 1822-371 is an eclipsing low-mass X-ray binary and X-ray pulsar, hosting a NS that shows periodic pulsations in the X-ray band with a period of 0.59 s. The inclination angle of the system is so high (80-85°) that in principle, it should be hard to observe both the direct thermal emission of the central object and the r…
Combining white light and UV Lyman-α coronagraphic images to determine the solar wind speed. The quick inversion method
Bemporad, A.; Frassati, F.; Giordano, S. +1 more
Context. The availability of multi-channel coronagraphic images in different wavelength intervals acquired from the space will provide a new view of the solar corona, allowing us to investigate the 2D distribution and time evolution of many plasma physical parameters, such as plasma density, temperature, and outflow speed.
Aims: This work foc…
Discovery of a multiphase O VI and O VII absorber in the circumgalactic/intergalactic transition region
Finoguenov, Alexis; Schaye, Joop; Muzahid, Sowgat +4 more
Aims: The observational constraints on the baryon content of the warm-hot intergalactic medium (WHIM) rely almost entirely on far ultraviolet (FUV) measurements. However, cosmological, hydrodynamical simulations predict strong correlations between the spatial distributions of FUV and X-ray absorbing WHIM. We investigate this prediction by ana…
Parsec-scale alignments of radio-optical offsets with jets in AGNs from multifrequency geodetic VLBI, Gaia EDR3, and the MOJAVE program
Liu, N.; Zhu, Z.; Barache, C. +5 more
Aims: We aim to study the relative positions of quasar emission centers at different wavelengths in order to help link the various realizations of the International Celestial Reference System (ICRS), and to unveil systematic uncertainties and individual source behavior at different wavelengths.
Methods: We based our study on four catalog…
Herschel observations of extraordinary sources: full Herschel/HIFI molecular line survey of Sagittarius B2(M)
Comito, C.; Schilke, P.; Lis, D. C. +5 more
Context. We present a full analysis of a broadband spectral line survey of Sagittarius B2 (Main), one of the most chemically rich regions in the Galaxy located within the giant molecular cloud complex Sgr B2 in the central molecular zone.
Aims: Our goal is to derive the molecular abundances and temperatures of the high-mass star-forming regio…
Investigating the delay between dust radiation and star-formation in local and distant quenching galaxies
Elbaz, D.; Ciesla, L.; Buat, V. +3 more
We investigate the timescale over which the infrared (IR) luminosity decreases after a complete and rapid quenching of star formation using observations of local and high-redshift galaxies. From spectral energy distribution modelling, we derive the time since quenching of a subsample of 14 galaxies from the Herschel Reference Survey that suffer fr…
S2D2: Small-scale Significant substructure DBSCAN Detection. I. NESTs detection in 2D star-forming regions
Hacar, Álvaro; Buckner, Anne S. M.; González, Marta +13 more
Context. The spatial and dynamical structure of star-forming regions can offer insights into stellar formation patterns. The amount of data from current and upcoming surveys calls for robust and objective procedures for detecting structures in order to statistically analyse the various regions and compare them.
Aims: We aim to provide the com…
Switchback-like structures observed by Solar Orbiter
Fedorov, A.; Lavraud, B.; Andre, N. +19 more
Context. Rapid polarity reversals of the radial heliospheric magnetic field were discovered by Ulysses and they are now frequently observed as a common near-Sun phenomenon by NASA's Parker Solar Probe (PSP). Other solar wind missions, including ESA-NASA Solar Orbiter (SolO), also observe similar phenomena. The nature of these fluctuations is uncle…
Multiwavelength view of SPT-CL J2106-5844. The radio galaxies and the thermal and relativistic plasmas in a massive galaxy cluster merger at z ≃ 1.13
Koribalski, Bärbel S.; Churazov, Eugene; Hopkins, Andrew M. +12 more
Context. SPT-CL J2106-5844 is among the most massive galaxy clusters at z > 1 yet discovered. While initially used in cosmological tests to assess the compatibility with Λ Cold Dark Matter cosmology of such a massive virialized object at this redshift, more recent studies indicate SPT-CL J2106-5844 is undergoing a major merger and is not an iso…