Search Publications
GTC/CanariCam Mid-IR Imaging of the Fullerene-rich Planetary Nebula IC 418: Searching for the Spatial Distribution of Fullerene-like Molecules
García-Lario, P.; García-Hernández, D. A.; García-Segura, G. +3 more
We present seeing-limited narrow-band mid-IR GTC/CanariCam images of the spatially extended fullerene-containing planetary nebula (PN) IC 418. The narrow-band images cover the C60 fullerene band at 17.4 µm, the polycyclic aromatic hydrocarbon like (PAH-like) feature at 11.3 µm, the broad 9-13 µm feature, and their adja…
The VMC survey. XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae
Sun, Ning-Chen; de Grijs, Richard; Ripepi, Vincenzo +10 more
We use deep multi-epoch point-spread function (PSF) photometry taken with the Visible and Infrared Survey Telescope for Astronomy (VISTA) to measure and analyze the proper motions of stars within the Galactic globular cluster 47 Tucanae (47 Tuc, NGC 104). The observations are part of the ongoing near-infrared VISTA survey of the Magellanic Cloud s…
Determination of projection effects of CMEs using quadrature observations with the two STEREO spacecraft
Bronarska, K.; Michalek, G.
Since 1995 coronal mass ejections (CMEs) have been routinely observed thanks to the sensitive Large Angle and Spectrometric Coronagraphs (LASCO) on board the Solar and Heliospheric Observatory (SOHO) mission. Their observed characteristics are stored, among other, in the SOHO/LASCO catalog. These parameters are commonly used in scientific studies.…
Systematic Labeling Bias in Galaxy Morphologies
Miller, Christopher J.; Cabrera-Vives, Guillermo; Schneider, Jeff
We present a metric to quantify systematic labeling bias in galaxy morphology data sets stemming from the quality of the labeled data. This labeling bias is independent from labeling errors and requires knowledge about the intrinsic properties of the data with respect to the observed properties. We conduct a relative comparison of label bias for d…
Photometric and astrometric study of open cluster FSR 814 (Koposov 36) using SDSS/2MASS/PPMXL/Gaia DR2
Hendy, Y. H. M.
We present multi photometric and astrometric study of open cluster FSR 814 (Koposov 36) selected from the FSR catalog in different bands of Sloan Digital Sky Survey (SDSS), 2MASS, PPMXL and Gaia DR2. This study contains new results with a very high accuracy for the first time and generates the multi decontaminated color-magnitude diagrams to estim…
The environment of the wind-wind collision region of η Carinae
Walter, R.; Panagiotou, C.
Context. η Carinae is a colliding wind binary hosting two of the most massive stars and featuring the strongest wind collision mechanical luminosity. The wind collision region of this system is detected in X-rays and γ-rays and offers a unique laboratory for the study of particle acceleration and wind magneto-hydrodynamics. Aim. Our main goal is t…
Tackling the Saturation of Oxygen: The Use of Phosphorus and Sulfur as Proxies within the Neutral Interstellar Medium of Star-forming Galaxies
Aloisi, A.; James, B.
The abundance of oxygen in galaxies is widely used in furthering our understanding of galaxy formation and evolution. Unfortunately, direct measurements of O/H in the neutral gas are extremely difficult to obtain, as the only O I line available within the Hubble Space Telescope (HST) UV wavelength range (1150-3200 Å) is often saturated. As such, p…
A tail like no other. The RPC-MAG view of Rosetta's tail excursion at comet 67P/Churyumov-Gerasimenko
Goetz, Charlotte; Richter, Ingo; Volwerk, Martin +4 more
Context. The Rosetta Plasma Consortium (RPC) magnetometer (MAG) data during the tail excursion in March-April 2016 are used to investigate the magnetic structure of and activity in the tail region of the weakly outgassing comet 67P/Churyumov-Gerasimenko (67P).
Aims: The goal of this study is to compare the large scale (near) tail structure wi…
NGC 7793 P9: An Ultraluminous X-Ray Source Evolved from a Canonical Black Hole X-Ray Binary
Kong, Albert K. H.; Hu, Chin-Ping; Ng, C. -Y. +1 more
Transient ultraluminous X-ray sources (ULXs) provide an important link bridging transient low-mass X-ray binaries and ULXs. Here we report the first discovery of both a canonical sub-Eddington outburst and an ultraluminous super-Eddington outburst from an unusual transient ULX, NGC 7793 P9, with a variability factor higher than 103. Its…
A SEA BASS on the Exoplanet HD 209458b
Morello, G.
We present here the first application of Stellar and Exoplanetary Atmospheres Bayesian Analysis Simultaneous Spectroscopy (SEA BASS) on real data sets. SEA BASS is a scheme that enables the simultaneous derivation of four-coefficient stellar limb-darkening profiles, transit depths, and orbital parameters from exoplanetary transits at multiple wave…