Search Publications
J1721+8842: a gravitationally lensed binary quasar with a proximate damped Lyman-α absorber
Courbin, F.; Sluse, D.; Lemon, C. +5 more
High-redshift binary quasars provide key insights into mergers and quasar activity, and are useful tools for probing the spatial kinematics and chemistry of galaxies along the line of sight. However, only three sub-10-kpc binaries have been confirmed above z = 1. Gravitational lensing would provide a way to easily resolve such binaries, study them…
Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution
Massa, D.; Hamann, W. -R.; Postnov, K. A. +10 more
M33 X-7 is the only known eclipsing black hole high mass X-ray binary. The system is reported to contain a very massive O supergiant donor and a massive black hole in a short orbit. The high X-ray luminosity and its location in the metal-poor galaxy M33 make it a unique laboratory for studying the winds of metal-poor donor stars with black hole co…
Weak evidence for variable occultation depth of 55 Cnc e with TESS
Demory, B. -O.; Morris, B. M.; Schanche, N. +2 more
Context. 55 Cnc e is in a 0.73 day orbit transiting a Sun-like star. It has been observed that the occultation depth of this super-Earth, with a mass of 8 M⊕ and radius of 2 R⊕, changes significantly over time at mid-infrared wavelengths. Observations with Spitzer measured a change in its day-side brightness temperature of 12…
Generic profile of a long-lived corotating interaction region and associated recurrent Forbush decrease
Temmer, M.; Vršnak, B.; Dumbović, M. +2 more
Context. Corotating interaction regions (CIRs), formed by the interaction of slow solar wind and fast streams that originate from coronal holes (CHs), produce recurrent Forbush decreases, which are short-term depressions in the galactic cosmic ray (GCR) flux.
Aims: Our aim is to prepare a reliable set of CIR measurements to be used as a textb…
Duality in spatially resolved star formation relations in local LIRGs
Colina, L.; Villar-Martín, M.; Arribas, S. +10 more
We analyse the star formation (SF) relations in a sample of 16 nearby luminous infrared galaxies (LIRGs) with more than 2800 regions defined on scales of 90 to 500 pc. We used ALMA to map the distribution of the cold molecular gas traced by the J = 2-1 line of CO and archival Paα HST/NICMOS imaging to trace the recent SF. In four objects we find t…
Metallicities and ages for star clusters and their surrounding fields in the Large Magellanic Cloud
Smolec, R.; Piatti, A. E.; Lewis, M. O. +15 more
Aims: We study 147 star clusters in the Large Magellanic Cloud (LMC) in order to determine their mean metallicities and ages, as well as the mean metallicities of 80 surrounding fields. We construct an age-metallicity relation (AMR) for the clusters in the LMC.
Methods: For this purpose, we used Strömgren photometry obtained with the SOI…
Extending empirical constraints on the SZ-mass scaling relation to higher redshifts via HST weak lensing measurements of nine clusters from the SPT-SZ survey at z ≳ 1
Schrabback, Tim; Hoekstra, Henk; Sharon, Keren +17 more
We present a Hubble Space Telescope (HST) weak gravitational lensing study of nine distant and massive galaxy clusters with redshifts 1.0 ≲ z ≲ 1.7 (zmedian = 1.4) and Sunyaev Zel'dovich (SZ) detection significance ξ > 6.0 from the South Pole Telescope Sunyaev Zel'dovich (SPT-SZ) survey. We measured weak lensing galaxy shapes in HST/…
Weighing the Galactic disk using phase-space spirals. III. Probing distant regions of the disk using the Gaia EDR3 proper motion sample
Monari, G.; Widmark, A.; Laporte, C. F. P.
We have applied our method to weigh the Galactic disk using phase-space spirals to the proper motion sample of Gaia's early third release (EDR3). For stars in distant regions of the Galactic disk, the latitudinal proper motion has a close projection with vertical velocity, such that the phase-space spiral in the plane of vertical position and vert…
SFR estimations from z = 0 to z = 0.9. A comparison of SFR calibrators for star-forming galaxies
Buat, V.; Boquien, M.; Małek, K. +7 more
Context. The star formation rate (SFR) is a key ingredient for studying the formation and evolution of galaxies. Being able to obtain accurate estimations of the SFR, for a wide range of redshifts, is crucial for building and studying galaxy evolution paths over cosmic time.
Aims: Based on a statistical sample of galaxies, the aim of this pap…
Binary open clusters in the Gaia data
Hu, Qingshun; Esamdin, Ali; Song, Fangfang +1 more
Context. Observations indicate that the fraction of potential binary star clusters in the Milky Way is either the same or lower than that of the Magellanic Clouds. The unprecedented precision in the parallax measurements by Gaia has allowed for the discovery of a growing number of new binary open clusters (OCs).
Aims: We aim to survey the can…