Search Publications
Short gamma-ray bursts within 200 Mpc
Troja, E.; Sakamoto, T.; Lien, A. Y. +5 more
We present a systematic search for short-duration gamma-ray bursts (GRBs) in the local Universe based on 14 yr of observations with the Neil Gehrels Swift Observatory. We cross-correlate the GRB positions with the GLADE catalogue of nearby galaxies, and find no event at a distance ≲100 Mpc and four plausible candidates in the range 100 Mpc ≲ D ≲ 2…
A robust estimate of the Milky Way mass from rotation curve data
Karukes, E. V.; Benito, M.; Iocco, F. +2 more
We present a new estimate of the mass of the Milky Way, inferred via a Bayesian approach by making use of tracers of the circular velocity in the disk plane and stars in the stellar halo, as from the publicly available galkin compilation. We use the rotation curve method to determine the dark matter distribution and total mass under different assu…
The CARMENES search for exoplanets around M dwarfs. Three temperate-to-warm super-Earths
Nagel, E.; Amado, P. J.; Bauer, F. F. +37 more
We announce the discovery of two planets orbiting the M dwarfs GJ 251 (0.360 ± 0.015M⊙) and HD 238090 (0.578 ± 0.021M⊙) based on CARMENES radial velocity (RV) data. In addition, we independently confirm with CARMENES data the existence of Lalande 21185 b, a planet that has recently been discovered with the SOPHIE spectrograph…
Deep transfer learning for star cluster classification: I. application to the PHANGS-HST survey
Kruijssen, J. M. Diederik; Chevance, Mélanie; Schruba, Andreas +13 more
We present the results of a proof-of-concept experiment that demonstrates that deep learning can successfully be used for production-scale classification of compact star clusters detected in Hubble Space Telescope(HST) ultraviolet-optical imaging of nearby spiral galaxies ( $D\lesssim 20\, \textrm{Mpc}$ ) in the Physics at High Angular Resolution …
High-resolution spectroscopy of flares and CMEs on AD Leonis
Guenther, E. W.; Mutabazi, T.; Jurua, E. +1 more
Context. Flares and coronal mass ejections (CMEs) are important for the evolution of the atmospheres of planets and their potential habitability, particularly for planets orbiting M stars at a distance <0.4 AU. Detections of CMEs on these stars have been sparse, and previous studies have therefore modelled their occurrence frequency by scaling …
The Variable and Non-variable X-Ray Absorbers in Compton-thin Type II Active Galactic Nuclei
Nikutta, Robert; Laha, Sibasish; Markowitz, Alex G. +3 more
We have conducted an extensive X-ray spectral variability study of a sample of 20 Compton-thin type II galaxies using broadband spectra from XMM-Newton, Chandra, and Suzaku. The aim is to study the variability of the neutral intrinsic X-ray obscuration along the line of sight and investigate the properties and location of the dominant component of…
KASHz: No evidence for ionised outflows instantaneously suppressing star formation in moderate luminosity AGN at z ∼ 1.4-2.6
Alexander, D. M.; Mainieri, V.; Cirasuolo, M. +9 more
As part of our KMOS AGN Survey at High-redshift (KASHz), we present spatially resolved VLT/KMOS and VLT/SINFONI spectroscopic data and ALMA 870 µm continuum imaging of eight z = 1.4-2.6 moderate AGN (L_{2-10 kev} = 1042-1045 ergs s-1). We map [O III], H α and rest-frame FIR emission to search for any spatial …
Spitzer Follow-up of Extremely Cold Brown Dwarfs Discovered by the Backyard Worlds: Planet 9 Citizen Science Project
Debes, John H.; Kiman, Rocio; Meisner, Aaron M. +38 more
We present Spitzer follow-up imaging of 95 candidate extremely cold brown dwarfs discovered by the Backyard Worlds: Planet 9 citizen science project, which uses visually perceived motion in multiepoch Wide-field Infrared Survey Explorer (WISE) images to identify previously unrecognized substellar neighbors to the Sun. We measure Spitzer [3.6]-[4.5…
Detection of Strong Epicyclic Density Spikes in the GD-1 Stellar Stream: An Absence of Evidence for the Influence of Dark Matter Subhalos?
Martin, Nicolas; Malhan, Khyati; Famaey, Benoit +3 more
The density variations in thin stellar streams may encode important information on the nature of dark matter. For instance, if dark matter aggregates into massive subhalos, these perturbers are expected to scatter stars out of dynamically cold stellar streams, possibly leading to detectable gaps in those structures. Here, we reexamine the density …
Slicing the cool circumgalactic medium along the major axis of a star-forming galaxy at z = 0.7
Dahle, H.; Rigby, J. R.; Bayliss, M. B. +13 more
We present spatially resolved Echelle spectroscopy of an intervening Mg II-Fe II-Mg I absorption-line system detected at zabs = 0.73379 towards the giant gravitational arc PSZ1 G311.65-18.48. The absorbing gas is associated with an inclined disc-like star-forming galaxy, whose major axis is aligned with the two arc-segments reported her…