Search Publications
A series of shocks and edges in Abell 2219
von der Linden, A.; Allen, S. W.; Russell, H. R. +6 more
We present deep, 170 ks, Chandra X-ray observations of Abell 2219 (z = 0.23), one of the hottest and most X-ray luminous clusters known, and which is experiencing a major merger event. We discover a `horseshoe' of high-temperature gas surrounding the ram-pressure-stripped, bright, hot, X-ray cores. We confirm an X-ray shock front located north-wes…
Triggered massive star formation associated with the bubble Hii region Sh2-39 (N5)
Gromadzki, M.; Borissova, J.; Kuhn, M. A. +3 more
Aims: We perform a multiwavelength analysis of the bubble Hii region Sh2-39 (N5) and its environs with the aim of studying the physical properties of Galactic IR bubbles and exploring their impact in triggering massive star formation.
Methods: To analyze the molecular gas, we used CO(3-2) and HCO+(4-3) line data obtained with …
On the silicate crystallinities of oxygen-rich evolved stars and their mass-loss rates
Gao, Jian; Li, Aigen; Liu, Jiaming +1 more
For decades ever since the early detection in the 1990s of the emission spectral features of crystalline silicates in oxygen-rich evolved stars, there is a long-standing debate on whether the crystallinity of the silicate dust correlates with the stellar mass-loss rate. To investigate the relation between the silicate crystallinities and the mass-…
Integral Field Spectroscopy of Balmer-dominated Shocks in the Magellanic Cloud Supernova Remnant N103B
Ghavamian, Parviz; Williams, Brian J.; Winkler, P. Frank +4 more
We present results of integral field spectroscopy of Balmer-dominated shocks in the LMC supernova remnant (SNR) N103B, carried out using the Wide Field Integral Spectrograph (WiFeS ) on the 2.3 m telescope at the Siding Spring Observatory in Australia. Existing X-ray studies of N103B have indicated an SN Ia origin. Radiative shock emission from cl…
Solar Wind Interaction and Atmospheric Escape
Bougher, Stephen W.; Brain, David A.; Barabash, Stanislav +3 more
Detection of Enhanced Central Mass-to-light Ratios in Low-mass Early-type Galaxies: Evidence for Black Holes?
Pechetti, Renuka; Strader, Jay; Mieske, Steffen +4 more
We present dynamical measurements of the central mass-to-light ratio (M/L) of a sample of 27 low-mass early-type {{ATLAS}}3{{D}} galaxies. We consider all {{ATLAS}}3{{D}} galaxies with 9.7 < log({M}\star /{M}⊙ ) < 10.5 in our analysis, selecting out galaxies with available high-resolution Hubble Sp…
The Slow Orbital Evolution of the Accreting Millisecond Pulsar IGR J0029+5934
Patruno, Alessandro
The accreting millisecond pulsars IGR J00291+5934 and SAX J1808.4-3658 are two compact binaries with very similar orbital parameters. The latter has been observed to evolve on a very short timescale of ∼70 Myr, which is more than an order of magnitude shorter than expected. There is an ongoing debate on the possibility that the pulsar spin-down po…
An analysis of star formation with Herschel in the Hi-GAL Survey. II. The tips of the Galactic bar
Paladini, R.; Piacentini, F.; Moore, T. J. T. +20 more
Context. We present the physical and evolutionary properties of prestellar and protostellar clumps in the Herschel Infrared GALactic plane survey (Hi-GAL) in two large areas centered in the Galactic plane and covering the tips of the long Galactic bar at the intersection with the spiral arms. The areas fall in the longitude ranges 19° <ℓ < 3…
Highly dynamically evolved intermediate-age open clusters
Piatti, Andrés E.; Dias, Wilton S.; Sampedro, Laura M.
We present a comprehensive UBVRI and Washington CT1T2 photometric analysis of seven catalogued open clusters, namely: Ruprecht 3, 9, 37, 74, 150, ESO 324-15 and 436-2. The multiband photometric data sets in combination with 2MASS photometry and Gaia astrometry for the brighter stars were used to estimate their structural para…
A Massive Molecular Outflow in the Dense Dust Core AGAL G337.916-00.477
Tokuda, Kazuki; Tachihara, Kengo; Kaneda, Hidehiro +9 more
Massive molecular outflows erupting from high-mass young stellar objects (YSOs) provide important clues to understanding the mechanism of high-mass star formation. Based on new CO J = 3-2 and J = 1-0 observations using the Atacama Submillimeter Telescope Experiment (ASTE) and Mopra telescope facilities, we discovered a massive bipolar outflow asso…