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10 papers · 1 filter
Accretion geometry of the black-hole binary Cygnus X-1 from X-ray polarimetry
M. Chauvin, H. -G. Florén, M. Friis +13
Black-hole binary (BHB) systems comprise a stellar-mass black hole and a closely orbiting companion star. Matter is transferred from the companion to the black hole, forming an acc…
Evaluating Performance of Photon-Number-Resolving Detectors
Mattias Jönsson, Gunnar Björk
We analyze the performance of photon-number-resolving (PNR) detectors and introduce a figure of merit for the accuracy of such detectors. This figure of merit is the (worst-case) p…
Spitzer Mid-Infrared Detections of Neutron Star Merger GW170817 Suggests Synthesis of the Heaviest Elements
Mansi M. Kasliwal, Daniel Kasen, Ryan M. Lau +8
We report our Spitzer Space Telescope observations and detections of the binary neutron star merger GW170817. At 4.5um, GW170817 is detected at 21.9 mag AB at +43 days and 23.9 mag…
Isochronal age-mass discrepancy of young stars: SCExAO/CHARIS integral field spectroscopy of the HIP 79124 triple system
Ruben Asensio-Torres, Thayne Currie, Markus Janson +24
We present SCExAO/CHARIS 1.1--2.4 micron integral field direct spectroscopy of the young HIP 79124 triple system. HIP 79124 is a member of the Scorpius-Centaurus association, consi…
Warm CO in evolved stars from the THROES catalogue. II. Herschel/PACS spectroscopy of C-rich envelopes
J. M. da Silva Santos, J. Ramos-Medina, C. Sánchez Contreras +1
This is the second paper of a series making use of Herschel/PACS spectroscopy of evolved stars in the THROES catalogue to study the inner regions of their circumstellar envelopes (…
SPHERE dynamical and spectroscopic characterization of HD142527B
R. Claudi, A. -L. Maire, D. Mesa +50
We detect the accreting low-mass companion HD142527B at a separation of 73 mas (11.4 au) from the star. No other companions with mass greater than 10 MJ are visible in the field of…