Search Publications
Weak lensing shear calibration with simulations of the HSC survey
Miyatake, Hironao; Leauthaud, Alexie; Mandelbaum, Rachel +8 more
We present results from a set of simulations designed to constrain the weak lensing shear calibration for the Hyper Suprime-Cam (HSC) survey. These simulations include HSC observing conditions and galaxy images from the Hubble Space Telescope (HST), with fully realistic galaxy morphologies and the impact of nearby galaxies included. We find that t…
The CARMENES search for exoplanets around M dwarfs . First visual-channel radial-velocity measurements and orbital parameter updates of seven M-dwarf planetary systems
Schmitt, J. H. M. M.; Rebolo, R.; del Burgo, C. +166 more
Context. The main goal of the CARMENES survey is to find Earth-mass planets around nearby M-dwarf stars. Seven M dwarfs included in the CARMENES sample had been observed before with HIRES and HARPS and either were reported to have one short period planetary companion (GJ 15 A, GJ 176, GJ 436, GJ 536 and GJ 1148) or are multiple planetary systems (…
Evidence for a large exomoon orbiting Kepler-1625b
Teachey, Alex; Kipping, David M.
Exomoons are the natural satellites of planets orbiting stars outside our solar system, of which there are currently no confirmed examples. We present new observations of a candidate exomoon associated with Kepler-1625b using the Hubble Space Telescope to validate or refute the moon's presence. We find evidence in favor of the moon hypothesis, bas…
RR Lyrae stars as standard candles in the Gaia Data Release 2 Era
Garofalo, Alessia; Clementini, Gisella; Muraveva, Tatiana +2 more
We present results from the analysis of 401 RR Lyrae stars (RRLs) belonging to the field of the Milky Way (MW). For a fraction of them multiband (V, Ks, W1) photometry, metal abundances, extinction values, and pulsation periods are available in the literature and accurate trigonometric parallaxes measured by the Gaia mission alongside G…
Atmospheric gas dynamics in the Perseus cluster observed with Hitomi
Done, Chris; Safi-Harb, Samar; Hamaguchi, Kenji +195 more
Extending the earlier measurements reported in Hitomi collaboration (2016, Nature, 535, 117), we examine the atmospheric gas motions within the central 100 kpc of the Perseus cluster using observations obtained with the Hitomi satellite. After correcting for the point spread function of the telescope and using optically thin emission lines, we fin…
The Gould’s Belt Distances Survey (GOBELINS). V. Distances and Kinematics of the Perseus Molecular Cloud
Kounkel, Marina; Rodríguez, Luis F.; Loinard, Laurent +10 more
We derive the distance and structure of the Perseus molecular cloud by combining trigonometric parallaxes from Very Long Baseline Array (VLBA) observations, taken as part of the GOBELINS survey and Gaia Data Release 2. Based on our VLBA astrometry, we obtain a distance of 321 ± 10 pc for IC 348. This is fully consistent with the mean distance of 3…
A Precise Distance to the Host Galaxy of the Binary Neutron Star Merger GW170817 Using Surface Brightness Fluctuations
Covino, S.; D'Avanzo, P.; Lyman, J. D. +25 more
The joint detection of gravitational waves (GWs) and electromagnetic radiation from the binary neutron star (BNS) merger GW170817 has provided unprecedented insight into a wide range of physical processes: heavy element synthesis via the r-process; the production of relativistic ejecta; the equation of state of neutron stars and the nature of the …
Spectroscopic Observations of Current Sheet Formation and Evolution
Warren, Harry P.; Doschek, George A.; Ugarte-Urra, Ignacio +3 more
We report on the structure and evolution of a current sheet that formed in the wake of an eruptive X8.3 flare observed at the west limb of the Sun on 2017 September 10. Using observations from the EUV Imaging Spectrometer (EIS) on Hinode and the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory, we find that plasma in the curren…
Dust Attenuation, Bulge Formation, and Inside-out Quenching of Star Formation in Star-forming Main Sequence Galaxies at z ∼ 2
Wuyts, S.; Förster Schreiber, N. M.; Genzel, R. +10 more
We derive 2D dust attenuation maps at ∼1 kpc resolution from the UV continuum for 10 galaxies on the z ∼ 2 star-forming main sequence (SFMS). Comparison with IR data shows that 9 out of 10 galaxies do not require further obscuration in addition to the UV-based correction, though our sample does not include the most heavily obscured, massive galaxi…
Main sequence of star forming galaxies beyond the Herschel confusion limit
Buat, V.; Małek, K.; Burgarella, D. +7 more
Context. Deep far-infrared (FIR) cosmological surveys are known to be affected by source confusion, causing issues when examining the main sequence (MS) of star forming galaxies. In the past this has typically been partially tackled by the use of stacking. However, stacking only provides the average properties of the objects in the stack.
Aim…