Search Publications
Detection of a Multiphase Ultrafast Wind in the Narrow-line Seyfert 1 Galaxy Mrk 1044
Santos-Lleó, M.; Peterson, B. M.; Nicastro, F. +6 more
We present a detailed analysis of XMM-Newton X-ray spectra of the Narrow-Line Seyfert 1 galaxy Mrk 1044. We find robust evidence for a multiphase, ultrafast outflow, traced by four separate components in the grating spectrum. One component has high column density and ionization state, and is outflowing at ~0.15c. The other three wind components ha…
Solar Anti-Hale Bipolar Magnetic Regions: A Distinct Population with Systematic Properties
Muñoz-Jaramillo, Andrés; Campusano, Luis E.; Navarrete, Benjamín
Besides their causal connection with long and short-term magnetic variability, solar bipolar magnetic regions are our chief source of insight into the location, size, and properties of large-scale toroidal magnetic structures in the solar interior. The great majority of these regions (≈95%) follow a systematic east-west polarity orientation (Hale'…
Detection of spectral variations of Anomalous Microwave Emission with QUIJOTE and C-BASS
Ashdown, M.; Barreiro, R. B.; Chiang, H. C. +32 more
Anomalous Microwave Emission (AME) is a significant component of Galactic diffuse emission in the frequency range 10- $60\, \mathrm{GHz}$ and a new window into the properties of sub-nanometre-sized grains in the interstellar medium. We investigate the morphology of AME in the ≈10○ diameter λ Orionis ring by combining intensity data from…
Probing the atmosphere of WASP-69 b with low- and high-resolution transmission spectroscopy
Mallonn, M.; López-Puertas, M.; Nagel, E. +31 more
Consideration of both low- and high-resolution transmission spectroscopy is key for obtaining a comprehensive picture of exoplanet atmospheres. In studies of transmission spectra, the continuum information is well established with low-resolution spectra, while the shapes of individual lines are best constrained with high-resolution observations. I…
Galaxy cluster cores as seen with VLT/MUSE: New strong-lensing analyses of RX J2129.4 + 0009, MS 0451.6 - 0305, and MACS J2129.4 - 0741
Richard, Johan; Kneib, Jean-Paul; Jauzac, Mathilde +4 more
We present strong-lensing analyses of three galaxy clusters, RX J2129.4 + 0009 (z = 0.235), MS 0451.6 - 0305 (z = 0.55), and MACS J2129.4 - 0741 (z = 0.589), using the powerful combination of Hubble Space Telescope (HST) multiband observations, and Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy. In RX J2129, we newly spectroscopically confi…
X-Ray Constraint on the Location of the AGN Torus in the Circinus Galaxy
Tanimoto, Atsushi; Ueda, Yoshihiro; Kawamuro, Taiki +5 more
The location of the obscuring "torus" in an active galactic nucleus (AGN) is still an unresolved issue. The line widths of X-ray fluorescence lines originating from the torus, particularly Fe Kα, carry key information on the radii of line-emitting regions. Utilizing XCLUMPY, an X-ray clumpy torus model, we develop a realistic model of emission lin…
A New Identity Card for the Bulge Globular Cluster NGC 6440 from Resolved Star Counts
Vesperini, Enrico; Pallanca, Cristina; Dalessandro, Emanuele +6 more
We present a new identity card for the cluster NGC 6440 in the Galactic Bulge. We have used a combination of high-resolution Hubble Space Telescope images, wide-field ground-based observations performed with the ESO-FORS2, and the public survey catalog Pan-STARRS to determine the gravitational center, projected density profile, and structural para…
Solar prominence diagnostics from non-LTE modelling of Mg II h&k line profiles
Barczynski, K.; Schmieder, B.; Labrosse, N. +1 more
Aims: We investigate a new method to for obtaining the plasma parameters of solar prominences observed in the Mg II h&k spectral lines by comparing line profiles from the IRIS satellite to a bank of profiles computed with a one-dimensional non-local thermodynamic equilibrium (non-LTE) radiative transfer code.
Methods: Using a grid of…
Ultra-short-period Planets in K2. III. Neighbors are Common with 13 New Multiplanet Systems and 10 Newly Validated Planets in Campaigns 0-8 and 10
Cochran, William D.; Endl, Michael; Howell, Steve B. +14 more
Using the EVEREST photometry pipeline, we have identified 74 candidate ultra-short-period planets (USPs; orbital period P < 1 day) in the first half of the K2 data (Campaigns 0-8 and 10). Of these, 33 candidates have not previously been reported. A systematic search for additional transiting planets found 13 new multiplanet systems containing a…
The surface brightness-colour relations based on eclipsing binary stars and calibrated with Gaia EDR3
Kervella, P.; Anderson, R. I.; Maxted, P. F. L. +23 more
Aims: The surface brightness-colour relation (SBCR) is a basic tool for establishing precise and accurate distances within the Local Group. Detached eclipsing binary stars with accurately determined radii and trigonometric parallaxes allow calibration of the SBCRs with unprecedented accuracy.
Methods: We analysed four nearby eclipsing bi…