Search Publications
The luminosity evolution of nova shells. I. A new analysis of old data
Vogt, N.; Ederoclite, A.; Schmidtobreick, L. +3 more
Over the last decade, nova shells have been discovered around a small number of cataclysmic variables that had not been known to be post-novae, while other searches around much larger samples have been mostly unsuccessful. This raises the question about how long such shells are detectable after the eruption and whether this time limit depends on t…
Dark dust and single-cloud sightlines in the ISM
Krełowski, J.; Siebenmorgen, R.; Bagnulo, S. +2 more
The precise characteristics of clouds and the nature of dust in the diffuse interstellar medium can only be extracted by inspecting the rare cases of single-cloud sightlines. In our nomenclature such objects are identified by interstellar lines, such as K I, that show at a resolving power of λ/Δλ ~ 75 000 one dominating Doppler component that acco…
The interacting nature of dwarf galaxies hosting superluminous supernovae
Schulze, Steve; Leloudas, Giorgos; Man, Allison W. S. +3 more
Context. Type I superluminous supernovae (SLSNe I) are rare, powerful explosions whose mechanism and progenitors remain elusive. Several studies have shown a preference for SLSNe I to occur in low-metallicity, actively star-forming dwarf galaxies.
Aims: We investigate whether the host galaxies of SLSNe I show increased evidence for interactio…
SDSS J1004+4112: the case for a galaxy cluster dominated by primordial black holes
Hawkins, M. R. S.
Aims: This paper is aimed at providing a plausible explanation for the large amplitude microlensing events observed in the cluster-lensed quasar system, SDSS J1004+4112. The microlensed quasar images appear to lie well clear of the stellar population of the cluster, raising the possibility that the cluster dark matter is composed of compact b…
First detection of the carbon chain molecules 13CCC and C13CC towards SgrB2(M)
Giesen, T. F.; Stutzki, J.; Simon, R. +4 more
Context. Carbon molecules and their 13C-isotopologues can be used to determine the 12C/13C abundance ratios in stellar and interstellar objects. C3 is a pure carbon chain molecule found in star-forming regions and in stellar shells of carbon-rich late-type stars. Latest laboratory data of 13C-…
Orbital variability of the optical linear polarization of the γ-ray binary LS I +61° 303 and new constraints on the orbital parameters
Piirola, Vilppu; Tsygankov, Sergey S.; Poutanen, Juri +8 more
We studied the variability of the linear polarization and brightness of the γ-ray binary LS I +61° 303. High-precision BVR photopolarimetric observations were carried out with the Dipol-2 polarimeter on the 2.2 m remotely controlled UH88 telescope at Mauna Kea Observatory and the 60 cm Tohoku telescope at Haleakala bservatory (Hawaii) over 140 nig…
An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242
Nandra, K.; Ponti, G.; Miller-Jones, J. C. A. +8 more
Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to domi…
Observations of a mix of cold and warm electrons by RPC-MIP at 67P/Churyumov-Gerasimenko
Henri, P.; Rubin, M.; Eriksson, A. I. +8 more
Context. The Mutual Impedance Probe (MIP) of the Rosetta Plasma Consortium (RPC) onboard the Rosetta orbiter which was in operation for more than two years, between August 2014 and September 2016 to monitor the electron density in the cometary ionosphere of 67P/Churyumov-Gerasimenko. Based on the resonance principle of the plasma eigenmodes, recen…
Exploring the coronal evolution of AR 12473 using time-dependent, data-driven magnetofrictional modelling
Kilpua, E. K. J.; Pomoell, J.; Price, D. J.
Aims: We present a detailed examination of the magnetic evolution of AR 12473 using time-dependent, data-driven magnetofrictional modelling.
Methods: We used maps of the photospheric electric field inverted from vector magnetogram observations, obtained by the Helioseismic and Magnetic Imager onboard the Solar Dynamics Observatory (SDO),…
Predicting the global far-infrared SED of galaxies via machine learning techniques
Bianchi, S.; Fritz, J.; Galliano, F. +10 more
Context. Dust plays an important role in shaping a galaxy's spectral energy distribution (SED). It absorbs ultraviolet (UV) to near-infrared radiation and re-emits this energy in the far-infrared (FIR). The FIR is essential to understand dust in galaxies. However, deep FIR observations require a space mission, none of which are still active today.…