Search Publications
Unveiling the Cosmic Cradle: clustering and massive star formation in the enigmatic Galactic bubble N59
Ojha, D. K.; Paulson, Sonu Tabitha; Mallick, K. K.
In this paper, we have conducted an investigation focused on a segment of the Spitzer mid-infrared bubble N59, specifically referred to as R1 within our study. Situated in the inner Galactic plane, this region stands out for its hosting of five 6.7 GHz methanol masers, as well as numerous compact $\mathrm{H}\, \rm {{\small II}}$ regions, massive c…
Influence of selection criteria on the interpretation of rotational behaviour of wide-binary star systems
Cookson, S. A.
Binary star systems are expected to follow Newtonian dynamics similarly to planetary systems. However, reports have been made of wide binary systems with separations around 0.01 pc and larger, showing potential deviations from standard Newtonian motion. This phenomenon, suggestive of the flattening of galactic rotation curves, calls for closer ins…
The Galactic supernova remnant CTB 1: optical and X-ray emission analysis
Rosado, M.; Arias, L.; Reyes-Iturbide, J. +4 more
We present the kinematic results for the supernova remnant (SNR) CTB 1, obtained with the PUMA equipment of the 2.1-m telescope at San Pedro Mártir National Astronomical Observatory, Baja California, Mexico. The observations were made on the H α line using a Fabry-Perot interferometer. The kinematics derived from the Fabry-Perot velocity cubes all…
NIR spectral classification of the companion in the gamma-ray binary HESS J1832-093 as an O6 V star
Papitto, A.; Negueruela, I.; de Oña Wilhelmi, E. +3 more
HESS J1832-093 is a member of the rare class of gamma-ray binaries, as recently confirmed by the detection of orbitally modulated X-ray and gamma-ray emission with a period of ~86 d. The spectral type of the massive companion star has been difficult to retrieve as there is no optical counterpart, but the system is coincident with a near-infrared s…
A multiwavelength study of Swift J0503.7-2819: a chimeric magnetic CV
Dewangan, G. C.; Buckley, D. A. H.; Singh, Kulinder Pal +7 more
We present multiwavelength temporal and spectral characteristics of a magnetic cataclysmic variable (MCV) Swift J0503.7-2819, using far ultraviolet and X-ray data from AstroSat, supplemented with optical data from the Southern African Large Telescope and X-ray data from the XMM-Newton and Swift observatories. The X-ray modulations at 4897.6657 s a…
A dragon's flame of many colours: multiwavelength observations of flares from the active M binary CR Draconis
Loyd, R. O. Parke; Jackman, James A. G.; Walker, Gary +9 more
We present the results of a multiwavelength Professional-Amateur campaign to study the behaviour of flares from the active M1.5V star binary CR Draconis. CR Dra was observed with Transiting Exoplanet Survey Satellite (TESS) 20-s photometry, Swift near-ultraviolet (NUV) grism spectroscopy and with ground-based optical photometry and spectroscopy fr…
The TESS-SPOC FFI target sample explored with Gaia
Bayliss, Daniel; Armstrong, David J.; Rodel, Toby +2 more
The Transiting Exoplanet Survey Satellite (TESS) mission has provided the community with high-precision times-series photometry for ~2.8 million stars across the entire sky via the full frame image (FFI) light curves produced by the TESS Science Processing Operations Center (SPOC). This set of light curves is an extremely valuable resource for the…
The enigmatic multiple star VV Ori
Blackford, Mark G.; Southworth, John; Budding, Edwin +6 more
New photometry, including TESS data, have been combined with recent spectroscopic observations of the Orion Ib pulsating triple-star system VV Ori. This yields a revised set of absolute parameters with increased precision. Two different programmes were utilized for the light-curve analysis, with results in predictably close agreement. The agreemen…
Herschel Gould Belt Survey in Taurus - II. A census of dense cores and filaments in the TMC1 region
Arzoumanian, D.; Könyves, V.; Palmeirim, P. +12 more
We present a catalogue of dense cores and filaments in a $3.8^\circ \times 2.4^\circ$ field around the TMC1 region of the Taurus molecular cloud. The catalogue was created using photometric data from the Herschel SPIRE and PACS instruments in the 70, 160, 250, 350, and 500 µm continuum bands. Extended structure in the region was reconstructe…
Gaia GraL: Gaia DR2 gravitational lens systems - VIII. A radio census of lensed systems
Djorgovski, S. G.; Mignard, François; Connor, Thomas +26 more
We present radio observations of 24 confirmed and candidate strongly lensed quasars identified by the Gaia Gravitational Lenses working group. We detect radio emission from eight systems in 5.5 and 9 GHz observations with the Australia Telescope Compact Array (ATCA), and 12 systems in 6 GHz observations with the Karl G. Jansky Very Large Array (VL…