Search Publications
An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b
Tamura, M.; Pallé, E.; Béjar, V. J. S. +25 more
We present the optical transmission spectrum of the hot Jupiter WASP-104b based on one transit observed by the blue and red channels of the Double Spectrograph (DBSP) at the Palomar 200-inch telescope and 14 transits observed by the MuSCAT2 four-channel imager at the 1.52-m Telescopio Carlos Sánchez. We also analyse 45 additional K2 transits, afte…
A feather on the hat: tracing the giant stellar stream around the Sombrero galaxy
Carballo-Bello, Julio A.; Erkal, Denis; Laine, Seppo +7 more
Recent evidence of extremely metal-rich stars found in the Sombrero galaxy (M104) halo suggests that this galaxy has undergone a recent major merger with a relatively massive galaxy. In this paper, we present wide-field deep images of the M104 outskirts obtained with a 18-cm amateur telescope with the purpose of detecting any coherent tidal featur…
An AMUSING look at the host of the periodic nuclear transient ASASSN-14ko reveals a second AGN
Kochanek, C. S.; Galbany, L.; Holoien, Thomas W. -S. +10 more
We present Multi-Unit Spectroscopic Explorer (MUSE) integral-field spectroscopy of ESO 253-G003, which hosts a known active galactic nucleus (AGN) and the periodic nuclear transient ASASSN-14ko, observed as part of the All-weather MUse Supernova Integral-field of Nearby Galaxies survey. The MUSE observations reveal that the inner region hosts two …
X-ray variability of the HMXB Cen X-3: evidence for inhomogeneous accretion flows
Torrejón, J. M.; Postnov, K.; Oskinova, L. +3 more
Cen X-3 is a compact high-mass X-ray binary likely powered by Roche lobe overflow. We present a phase-resolved X-ray spectral and timing analysis of two pointed XMM-Newton observations. The first one took place during a normal state of the source, when it has a luminosity LX ∼ 1036 erg s-1. This observation covered…
(6478) Gault: physical characterization of an active main-belt asteroid
Skiff, Brian A.; Rivet, Jean-Pierre; Bendjoya, Philippe +22 more
In 2018 December, the main-belt asteroid (6478) Gault was reported to display activity. Gault is an asteroid belonging to the Phocaea dynamical family and was not previously known to be active, nor was any other member of the Phocaea family. In this work, we present the results of photometric and spectroscopic observations that commenced soon afte…
The evolution of the low-density H I> intergalactic medium from z = 3.6 to 0: data, transmitted flux, and H I> column density,
Savage, B. D.; Wakker, B. P.; Viel, M. +8 more
We present a new, uniform analysis of the H I transmitted flux (F) and H I column density ($N_{\mathrm{H\,{\small I}}}$) distribution in the low-density IGM as a function of redshift z for 0 < z < 3.6 using 55 HST/COS FUV (Δz = 7.2 at z < 0.5), five HST/STIS + COS NUV (Δz = 1.3 at z ~ 1) and 24 VLT/UVES, and Keck/HIRES (Δz = 11.6 at 1.7 &…
Discovery of a young low-mass brown dwarf transiting a fast-rotating F-type star by the Galactic Plane eXoplanet (GPX) survey
Vanderburg, A.; Molina, D.; Bonfanti, A. +64 more
We announce the discovery of GPX-1 b, a transiting brown dwarf with a mass of 19.7 ± 1.6 MJup and a radius of 1.47 ± 0.10 RJup, the first substellar object discovered by the Galactic Plane eXoplanet (GPX) survey. The brown dwarf transits a moderately bright (V = 12.3 mag) fast-rotating F-type star with a projected rotational …
The PAU survey: estimating galaxy photometry with deep learning
Carretero, J.; Castander, F. J.; García-Bellido, J. +14 more
With the dramatic rise in high-quality galaxy data expected from Euclid and Vera C. Rubin Observatory, there will be increasing demand for fast high-precision methods for measuring galaxy fluxes. These will be essential for inferring the redshifts of the galaxies. In this paper, we introduce LUMOS, a deep learning method to measure photometry from…
Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data
Brough, S.; Staveley-Smith, Lister; Holwerda, B. W. +13 more
We use the 21-cm emission-line data from the Deep Investigation of Neutral Gas Origin-Very Large Array (DINGO-VLA) project to study the atomic hydrogen gas H I of the Universe at redshifts z < 0.1. Results are obtained using a stacking analysis, combining the H I signals from 3622 galaxies extracted from 267 VLA pointings in the G09 field of th…
The Carbon-to-H2, CO-to-H2 conversion factors, and carbon abundance on kiloparsec scales in nearby galaxies
Gao, Yu; Zhao, Yinghe; Jiao, Qian
Using the atomic carbon [C I] ($^{3} \rm P_{1} \rightarrow {\rm ^3 P}_{0}$) and [C I] ($^{3} \rm P_{2} \rightarrow {\rm ^3 P}_{1}$) emission {hereafter [C I] (1 - 0) and [C I] (2 - 1), respectively} maps observed with the Herschel Space Observatory, and CO (1 - 0), H I, infrared and submm maps from literatures, we estimate the [C I]-to-H2