Search Publications
Not so different after all: properties and spatial structure of column density peaks in the pipe and Orion A clouds
Lombardi, Marco; Palau, Aina; Alfaro, Emilio +4 more
We present a comparative study of the physical properties and the spatial distribution of column density peaks in two giant molecular clouds (GMCs), the Pipe Nebula and Orion A, which exemplify opposite cases of star cluster formation stages. The density peaks were extracted from dust extinction maps constructed from Herschel/SPIRE far-infrared im…
Gas phase SiO in the circumstellar environment of the recurrent nova T Coronae Borealis
Munari, U.; Gehrz, R. D.; Shahbandeh, M. +9 more
We report the discovery of the diatomic molecule SiO in the gas phase in the environment of the recurrent nova T Coronae Borealis. While some of the SiO is photospheric, a substantial portion must arise in the wind from the red giant component of T CrB. A simple fit to the SiO feature, assuming local thermodynamic equilibrium, suggests a SiO colum…
Star-forming regions at the periphery of the supershell surrounding the Cyg OB1 association - II. ISM kinematics and YSOs in the star cluster vdB 130 region
Wiebe, D. S.; Moiseev, A. V.; Lozinskaya, T. A. +4 more
We present an observational study of small-scale feedback processes operating in the star-forming region located in the wall of the expanding supershell around the Cyg OB1 association. The interstellar gas and dust content and pre-stellar populations in the vicinity of the open star cluster vdB 130 are analysed based on new optical and IR observat…
Clues on Arp 142: The spiral-elliptical merger
Mendes de Oliveira, Claudia; Firpo, Verónica; Torres-Flores, Sergio +3 more
Nearby merging pairs are unique laboratories in which one can study the gravitational effects on the individual interacting components. In this manuscript, we report the characterization of selected H II regions along the peculiar galaxy NGC 2936, member of the galaxy pair Arp 142, an E+S interaction, known as `The Penguin'. Using Gemini South spe…
Comet C/2018 V1 (Machholz-Fujikawa-Iwamoto): dislodged from the Oort Cloud or coming from interstellar space?
de la Fuente Marcos, R.; de la Fuente Marcos, C.
The chance discovery of the first interstellar minor body, 1I/2017 U1 (`Oumuamua), indicates that we may have been visited by such objects in the past and that these events may repeat in the future. Unfortunately, minor bodies following nearly parabolic or hyperbolic paths tend to receive little attention: over 3/4 of those known have data-arcs sh…
Revised and updated catalogue of the First Byurakan Survey of Late-Type Stars: second edition
Gigoyan, K. S.; Kostandyan, G. R.; Mickaelian, A. M.
A total of 18 lists of the First Byurakan Survey of Late-Type Stars (FBS LTS) were published between 1990 and 2016. The stars were found on FBS low-dispersion spectroscopic plates. A systematic search and selection were carried out on a surface of ∼16 000 deg2 on almost the whole area of the FBS. As a result, the 'Revised and Updated Ca…
From outburst to quiescence: spectroscopic evolution of V1838 Aql imbedded in a bow-shock nebula
Chavushyan, V.; Neustroev, V.; García-Díaz, Ma T. +15 more
We analyse new optical spectroscopic, direct-image and X-ray observations of the recently discovered a high-proper motion cataclysmic variable V1838 Aql. The data were obtained during its 2013 superoutburst and its subsequent quiescent state. An extended emission around the source was observed up to 30 d after the peak of the superoutburst, interp…
Variable stars in young open cluster NGC 2244
Michalska, Gabriela
We present results of a UBVIC variability survey in the young open cluster NGC 2244. In total, we found 245 variable stars. Most of them, 211 stars, are variables with irregular variations. Furthermore, 23 periodic variables were found. We also detected four candidates for δ Scuti stars and seven eclipsing binaries. Based on the mid-inf…
Young star clusters and the structure of the second Galactic quadrant II
Molina Lera, J. A.; Baume, G.; Gamen, R.
Galactic spiral arms are traced using young objects as giant molecular clouds, H II regions, OB stars, or young open/embedded clusters. To improve the knowledge of the Galactic structure in the second quadrant we selected, from more than 200 open clusters covered by the SDSS, a sample of 10 young stellar clusters to conduct a spectrophotometric st…
Inquiring into the nature of the Abell 2667 brightest cluster galaxy: physical properties from MUSE
Berta, S.; Popesso, P.; Rodighiero, G. +21 more
Based on HST and MUSE data, we probe the stellar and gas properties (i.e. kinematics, stellar mass, star formation rate) of the radio-loud brightest cluster galaxy (BCG) located at the centre of the X-ray-luminous cool-core cluster Abell 2667 (z = 0.2343). The bi-dimensional modelling of the BCG surface brightness profile reveals the presence of a…