Search Publications
The disruption of the low-mass globular cluster E 3
Carballo-Bello, Julio A.; Piatti, Andrés E.; Salinas, Ricardo
We use Gaia DR2 photometry and proper motions to search for the hypothetical tidal tails of the Galactic globular cluster E 3. Using a modified version of a classical decontamination procedure, we are able to identify the presence of an extended structure emerging from the cluster up to r ∼ 1 deg from its centre, thus suggesting that this poorly s…
Searching for optical companions to four binary millisecond pulsars with the Gran Telescopio Canarias
Zharikov, S. V.; Karpova, A. V.; Zyuzin, D. A. +6 more
We report on multiband photometric observations of four binary millisecond pulsars with the Gran Telescopio Canarias. The observations led to detection of binary companions to PSRs J1630+3734, J1741+1351, and J2042+0246 in the Sloan g', r', and I' bands. Their magnitudes in the r' band are ≈24.4, 24.4, and 24.0, respectively. We also set a 3σ uppe…
MNELLS: the MUSE nearby early-type galaxy lens locator survey
Lucey, John R.; Smith, Russell J.; Collier, William P.
Low-redshift strong-lensing galaxies can provide robust measurements of the stellar mass-to-light ratios in early-type galaxies (ETGs), and hence constrain variations in the stellar initial mass function (IMF). At present, only a few such systems are known. Here, we report the first results from a blind search for gravitationally lensed emission-l…
The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder I. The Spectral Feature Finder and Catalogue
Valtchanov, I.; Spencer, L. D.; Hopwood, R. +11 more
We provide a detailed description of the Herschel/SPIRE Fourier Transform Spectrometer (FTS) Spectral Feature Finder (FF). The FF is an automated process designed to extract significant spectral features from SPIRE FTS data products. Optimizing the number of features found in SPIRE-FTS spectra is challenging. The wide SPIRE-FTS frequency range (44…
Discovery of an 30-yr-duration post-nova pulsating supersoft source in the Large Magellanic Cloud
Haberl, F.; Udalski, A.; Vasilopoulos, G. +3 more
Supersoft X-ray sources (SSS) have been identified as white dwarfs accreting from binary companions and undergoing nuclear burning of the accreted material on their surface. Although expected to be a relatively numerous population from both binary evolution models and their identification as type Ia supernova progenitor candidates, given the very …
Location, orbit, and energy of a meteoroid impacting the Moon during the lunar eclipse of 2019 January 21
Zuluaga, J. I.; Tangmatitham, M.; Cuartas-Restrepo, P. +5 more
During lunar eclipse of 2019 January 21, a meteoroid impacted the Moon producing a visible light flash. The impact was witnessed by casual observers offering an opportunity to study the phenomenon from multiple geographical locations. We use images and videos collected by observers in seven countries to estimate the location, impact parameters (sp…
Swift unveils the orbital period of IGR J18214-1318
Cusumano, G.; La Parola, V.; Segreto, A. +2 more
We analysed 13 yr of the Neil Gehrels Swift Observatory survey data collected on the high-mass X-ray binary IGR J18214-1318. Performing the timing analysis, we detected a periodic signal of 5.42 d. From the companion star characteristics, we derived an average orbital separation of $\sim 41 \rm R_{\odot }\simeq 2 R_{\star }$ . The spectral type of…
Measuring the matter density of the Galactic disc using stellar streams
Malhan, Khyati; Widmark, Axel; Sivertsson, Sofia +1 more
We present a novel method for determining the total matter surface density of the Galactic disc by analysing the kinematics of a dynamically cold stellar stream that passes through or close to the Galactic plane. The method relies on the fact that the vertical component of energy for such stream stars is approximately constant, such that their ver…
Multiple AGN activity during the BCG assembly of XDCPJ0044.0-2033 at z ∼ 1.6
Fiore, F.; Piconcelli, E.; Tozzi, P. +13 more
Undisturbed galaxy clusters are characterized by a massive and large elliptical galaxy at their centre, i.e. the brightest cluster galaxy (BCG). How these central galaxies form is still debated. According to most models, a typical epoch for their assembly is $z$ ∼ 1-2. We have performed a detailed multiwavelength analysis of the core of XMM-Newton…
Wray 15-906: a candidate luminous blue variable discovered with WISE, Herschel, and SALT
Berdnikov, L. N.; Gvaramadze, V. V.; Kniazev, A. Y. +1 more
We present the results of study of the Galactic candidate luminous blue variable Wray 15-906, revealed via detection of its infrared circumstellar shell (of ≈2 pc in diameter) with the Wide-field Infrared Survey Explorer and the Herschel Space Observatory. Using the stellar atmosphere code CMFGEN and the Gaia parallax, we found that Wray 15-906 is…