Search Publications
O2 signature in thin and thick O2-H2O ices⋆
Caselli, P.; Vasyunin, A. I.; Bizzocchi, L. +2 more
Aims: In this paper we investigate the detectability of the molecular oxygen in icy dust grain mantles towards astronomical objects.
Methods: We present a systematic set of experiments with O2-H2O ice mixtures designed to disentangle how the molecular ratio affects the O2 signature in the mid- and near-in…
In-depth study of long-term variability in the X-ray emission of the Be/X-ray binary system AX J0049.4-7323
Santangelo, A.; Ducci, L.; Romano, P. +3 more
AX J0049.4-7323 is a Be/X-ray binary in the Small Magellanic Cloud hosting a 750 s pulsar which has been observed over the last 17 years by several X-ray telescopes. Despite numerous observations, little is known about its X-ray behaviour. Therefore, we coherently analysed archival Swift, Chandra, XMM-Newton, RXTE, and INTEGRAL data, and we compar…
The supernova-regulated ISM. IV. A comparison of simulated polarization with Planck observations
Juvela, M.; Käpylä, M. J.; Väisälä, M. S. +1 more
Context. Efforts to compare polarization measurements with synthetic observations from magnetohydrodynamics (MHD) models have previously concentrated on the scale of molecular clouds.
Aims: We extend the model comparisons to kiloparsec scales, taking into account hot shocked gas generated by supernovae and a non-uniform dynamo-generated magne…
Planetary nebula IC 5148 and its ionized halo
Kimeswenger, S.; Barría, D.; Kausch, W. +1 more
Context. Many round or roundish planetary nebulae (PNe) show multiple shells and halo structures during their evolutionary stage near the maximum temperature of their central star. Controversial debate is ongoing if these structures are recombination halos, as suggested by hydrodynamic modeling efforts, or ionized material. Recently, we discovered…
Massive star population of the Virgo Cluster galaxy NGC4535. Discovery of new massive variable candidates with the Hubble Space Telescope
Hatzidimitriou, D.; Nota, A.; Gavras, P. +10 more
We analyzed the massive star population of the Virgo Cluster galaxy NGC 4535 using archival Hubble Space Telescope Wide Field Planetary Camera 2 images in filters F555W and F814W, equivalent to Johnson V and Kron-Cousins I. We performed high precision point spread function fitting photometry of 24353 sources including 3762 candidate blue supergian…
Infrared outbursts as potential tracers of common-envelope events in high-mass X-ray binary formation
Oskinova, Lidia M.; Bulik, Tomasz; Gómez-Morán, Ada Nebot
Context. Classic massive binary evolutionary scenarios predict that a transitional common-envelope (CE) phase could be preceded as well as succeeded by the evolutionary stage when a binary consists of a compact object and a massive star, that is, a high-mass X-ray binary (HMXB). The observational manifestations of common envelope are poorly constr…
86 GHz SiO maser survey of late-type stars in the Inner Galaxy. IV. SiO emission and infrared data for sources in the Scutum and Sagittarius-Carina arms, 20° < l < 50°
Menten, K. M.; Omont, A.; Habing, H. J. +2 more
We present an 86 GHz SiO (v = 1, J = 2 → 1) maser search toward late-type stars located within |b|< 0.°5 and 20° < l < 50°. This search is an extension at longer longitudes of a previously published work. We selected 135 stars from the MSX catalog using color and flux criteria and detected 92 (86 new detections). The detection rate is 6…
Evolution of the anti-truncated stellar profiles of S0 galaxies since z = 0.6 in the SHARDS survey. II. Structural and photometric evolution
Barro, Guillermo; Pérez-González, Pablo G.; Borlaff, Alejandro +7 more
Context. Anti-truncated lenticular galaxies (Type-III S0s) present tight scaling relations between their surface brightness photometric and structural parameters. Although several evolutionary models have been proposed for the formation of these structures, the observations of Type-III S0 galaxies are usually limited to the local Universe.
Ai…
ATCA observations of the MACS-Planck Radio Halo Cluster Project. II. Radio observations of an intermediate redshift cluster sample
Brunetti, G.; Aghanim, N.; Arnaud, M. +16 more
Aim. A fraction of galaxy clusters host diffuse radio sources whose origins are investigated through multi-wavelength studies of cluster samples. We investigate the presence of diffuse radio emission in a sample of seven galaxy clusters in the largely unexplored intermediate redshift range (0.3 < z < 0.44).
Methods: In search of diffuse…
Warm CO in evolved stars from the THROES catalogue. I. Herschel-PACS spectroscopy of O-rich envelopes
García-Lario, P.; Sánchez Contreras, C.; da Silva Santos, J. M. +1 more
In this work (Paper I), we analyse Herschel-PACS spectroscopy for a subsample of 23 O-rich and 3 S-type evolved stars, in different evolutionary stages from the asymptotic giant branch (AGB) to the planetary nebula (PN) phase, from the THROES catalogue. (C-rich targets are separately studied in Paper II). The broad spectral range covered by PACS (…