Search Publications
Revisit NGC 5466 tidal stream with Gaia, SDSS/SEGUE, and LAMOST
Zhao, Gang; Zhao, Jing-Kun; Ishigaki, Miho N. +5 more
By mining the data from Gaia Early Data Release 3, Sloan Digital Sky Survey/Sloan Extension for Galactic Understanding and Exploration Data Release 16, and Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Release 8, 11 member stars of the NGC 5466 tidal stream are detected and 7 of them are newly identified. To reject contaminators, …
Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy
Smith, Russell J.; Poci, Adriano
Exploiting the relative proximity of the nearby strong-lens galaxy SNL-1, we present a critical comparison of the mass estimates derived from independent modelling techniques. We fit triaxial orbit-superposition dynamical models to spatially resolved stellar kinematics, and compare to the constraints derived from lens modelling of high-resolution …
Revisiting a detached stellar structure in the outer north-eastern region of the Small Magellanic Cloud
Piatti, Andrés E.
The outer north-eastern region of the Small Magellanic Cloud (SMC) is populated by a shell-like overdensity whose nature was recently investigated. We analysed 20 catalogued star clusters projected on to it from Survey of the MAgellanic Stellar History data sets. After carrying out a cleaning of field stars in the star cluster colour-magnitude dia…
High-resolution ALMA and HST imaging of κCrB: a broad debris disc around a post-main-sequence star with low-mass companions
Wyatt, M. C.; Bonsor, A.; Marino, S. +6 more
$\kappa \,$ CrB is an ~2.5 Gyr old K1 sub-giant star, with an eccentric exo-Jupiter at ~2.8 au and a debris disc at tens of au. We present ALMA (Atacama Large Millimetre/submillimetre Array) Band 6 (1.3 mm) and Hubble Space Telescope scattered light (0.6$\, \mu$m) images, demonstrating $\kappa \,$CrB's broad debris disc, covering an extent $50\!-\…
Discovering vanishing objects in POSS I red images using the Virtual Observatory
Rodrigo, C.; Solano, Enrique; Villarroel, B.
In this paper, we report a search for vanishing sources in POSS I red images using virtual observatory (VO) archives, tools, and services. The search, conducted in the framework of the VASCO project, aims at finding POSS I (red) sources not present in recent catalogues like Pan-STARRS DR2 (limiting magnitude r = 21.4) or Gaia EDR3 (limiting magnit…
Modelling the flare in NGC 1097 from 1991 to 2004 as a tidal disruption event
Zhang, Xue-Guang
In the letter, interesting evidence is reported to support a central tidal disruption event (TDE) in the known AGN NGC 1097. Considering the motivations of TDE as one probable origination of emission materials of double-peaked broad emission lines and also as one probable explanation to changing-look AGN, it is interesting to check whether there a…
Taxonomy of protoplanetary discs observed with ALMA
Ward-Thompson, Derek; Kirk, Jason; Parker, Raeesa
Many observations of protoplanetary discs studied with ALMA have revealed the complex substructure present in the discs. Rings and gaps in the dust continuum are now a common sight in many discs; however, their origins still remain unknown. We look at all protoplanetary disc images taken with ALMA from cycles 0 to 5 and find that 56 discs show cle…
A highly mutually inclined compact warm-Jupiter system KOI-984?
Schmitt, J. H. M. M.; Czesla, S.; Wang, X. +6 more
The discovery of a population of close-orbiting giant planets (≤ 1 au) has raised a number of questions about their origins and dynamical histories. These issues have still not been fully resolved, despite over 20 years of exoplanet detections and a large number of discovered exoplanets. In particular, it is unclear whether warm Jupiters (WJs) for…
3D mapping of the Wolf-Rayet nebula M 1-67: clues for post-common envelope evolution in massive stars
Guerrero, M. A.; Toalá, J. A.; Santamaría, E. +5 more
We present a 3D mapping of the Wolf-Rayet (WR) nebula M 1-67 around WR 124. We obtained high-resolution San Pedro Mártir (SPM) Manchester Echelle Spectrograph (MES) observations along 17 long-slit positions covering all morphological features in M 1-67. We are able to unveil the true morphology of M 1-67 and its kinematics by interpreting the SPM …
Two evolved close binary stars: GALEX J015054.4+310745 and the central star of the planetary nebula Hen 2-84
Reindl, Nicole; Irrgang, Andreas; Heber, Ulrich +3 more
As part of a survey to find close binary systems among central stars of planetary nebula, we present two newly discovered binary systems. GALEX J015054.4+310745 is identified as the central star of the possible planetary nebula Fr 2-22. We find it to be a single-lined spectroscopic binary with an orbital period of 0.2554435(10) d. We support the p…