Search Publications
HD 50975: a yellow supergiant in a spectroscopic binary system
Sperauskas, J.; Raudeliūnas, S.; Začs, L. +2 more
Context. Recent detection of a yellow supergiant star as a possible progenitor of a supernova has posed serious questions about our understanding of the evolution of massive stars.
Aims: The spectroscopic binary star HD 50975 with an unseen hot secondary was studied in detail with the main goal of estimating fundamental parameters of both com…
Strong lensing analysis of PLCK G004.5-19.5, a Planck-discovered cluster hosting a radio relic at z = 0.52
Sifón, Cristóbal; Hughes, John P.; Barrientos, L. Felipe +2 more
Context. The recent discovery of a large number of galaxy clusters using the Sunyaev-Zel'dovich (SZ) effect has opened a new era on the study of the most massive clusters in the Universe. Multiwavelength analyses are required to understand the properties of these new sets of clusters, which are a sensitive probe of cosmology.
Aims: We aim for…
Molecular gas associated with IRAS 10361-5830
Rubio, M.; Cappa, C. E.; Vazzano, M. M. +2 more
Aims: We analyze the distribution of the molecular gas and dust in the molecular clump linked to
Herschel/PACS photometry of transiting-planet host stars with candidate warm debris disks
Ardila, David R.; Bouy, Hervé; Stapelfeldt, Karl +4 more
Dust in debris disks is produced by colliding or evaporating planetesimals, which are remnants of the planet formation process. Warm dust disks, known by their emission at ≤24 µm, are rare (4% of FGK main sequence stars) and especially interesting because they trace material in the region likely to host terrestrial planets, where the dust ha…
Stereoscopic observations of the effects of a halo CME on the solar coronal structure
Romano, P.; Spadaro, D.; Dolei, S. +1 more
We investigated the substantial restructuring of the outer solar corona in the aftermath of the halo CME that occurred on 9 March 2012. To perform our analysis, we used SOHO/LASCO, STEREO/COR1 and SDO/AIA data, which provide observations from different viewpoints. In particular, we applied the polarization ratio technique to the COR1 calibrated im…
XMM-Newton and Chandra X-ray follow-up observations of the VHE gamma-ray source HESS J1507-622
Tibolla, O.; Kaufmann, S.; Kosack, K.
Context. The discovery of the unique source HESS J1507-622 in the very high energy (VHE) range (100 GeV-100 TeV) opened new possibilities to study the parent population of ultra-relativistic particles found in astrophysical sources and underlined the possibility of new scenarios/mechanisms crucial for understanding the underlying astrophysical pro…
Resolving the shocked gas in HH 54 with Herschel. CO line mapping at high spatial and spectral resolution
Olofsson, G.; Liseau, R.; Benedettini, M. +11 more
Context. The HH 54 shock is a Herbig-Haro object, located in the nearby Chamaeleon II cloud. Observed CO line profiles are due to a complex distribution in density, temperature, velocity, and geometry.
Aims: Resolving the HH 54 shock wave in the far-infrared (FIR) cooling lines of CO constrain the kinematics, morphology, and physical conditio…
Activity-related variations of high-degree p-mode amplitude, width, and energy in solar active regions
Chae, J.; Maurya, R. A.; Ambastha, A.
Context. Solar energetic transients such as flares and coronal mass ejections occur mostly within active regions (ARs) and release large amounts of energy, which is expected to excite acoustic waves by transferring the mechanical impulse of the thermal expansion of the flare on the photosphere. On the other hand, strong magnetic fields of AR sunsp…
Stereoscopic investigation on plasma density fluctuations in the outer solar corona
Romano, P.; Antonucci, E.; Spadaro, D. +3 more
This research note extends a previous work focused on the 2D reconstruction of the spatial distribution and temporal evolution of the plasma density fluctuations in the outer solar corona and based on STEREO COR1-A white-light observations. By using the corresponding total brightness images obtained in the same observational period with the corona…
Herschel-Planck dust optical-depth and column-density maps (Corrigendum). I. Method description and results for Orion
Alves, João; Bouy, Hervé; Lada, Charles J. +1 more