Search Publications
Searching for OB-type pre-supernova binary companions inside supernova remnants
Neuhäuser, R.; Mugrauer, M.; Ankay, A. +5 more
We searched for OB-runaway stars inside supernova remnants (SNRs) as a pre-supernova binary companion. As the majority of massive stars are found in close binary systems, a runaway star ejected by the orbital energy after the supernova (SN) is expected to be found. Considering a binary mass fraction, q = 0.25-1.0, the runaway star is likely to hav…
The KALEIDOSCOPE survey: a new strong and weak gravitational lensing view of the massive galaxy cluster MACS J1423.8+2404
Mahler, Guillaume; Jauzac, Mathilde; Ebeling, Harald +6 more
We present a combined strong and weak gravitational-lensing analysis of the massive galaxy cluster MACS J1423.8+2404 (
Euclid view of the dusty star-forming galaxies at ≳ detected in wide area submillimetre surveys
Cai, Zhen-Yi; Mitra, Dipanjan; Negrello, Mattia +1 more
We investigate the constraints provided by the Euclid space observatory on the physical properties of dusty star-forming galaxies (DSFGs) at $z\gtrsim 1.5$ detected in wide area submillimetre surveys with Herschel. We adopt a physical model for the high-z progenitors of spheroidal galaxies, which form the bulk of DSFGs at $z\gtrsim 1.5$. We improv…
A comprehensive study of orbital evolution of LMC X-4: existence of a second derivative of the orbital period
Paul, Biswajit; Jain, Chetana; Sharma, Rahul
We report here results from pulse arrival time delay analysis of the eclipsing high-mass X-ray binary (HMXB) pulsar LMC X-4 using observations made with the Rossi X-ray Timing Explorer, XMM-Newton, NuSTAR (Nuclear Spectroscopic Telescope ARray), and AstroSat. Combining the orbital parameters determined from these observations with the historical m…
Cold electrons at a weakly outgassing comet
Henri, P.; Galand, M.; Deca, J. +1 more
Throughout the Rosetta mission, cold electrons (<1 eV) were measured in the coma of comet 67P/Churyumov-Gerasimenko. Cometary electrons are produced at ~10 eV through photoionization or through electron-impact ionization collisions. The cold electron population is formed by cooling the warm population through inelastic electron-neutral collisio…
Machine-learning applications for cataclysmic variable discovery in the ZTF alert stream
Copperwheat, C. M.; Darnley, M. J.; Mistry, D. +1 more
Cataclysmic variables (CV) encompass a diverse array of accreting white dwarf binary systems. Each class of CV represents a snapshot along an evolutionary journey, one with the potential to trigger a type Ia supernova event. The study of CVs offers valuable insights into binary evolution and accretion physics, with the rarest examples potentially …
The Gaia ultracool dwarf sample-IV. GTC/OSIRIS optical spectra of Gaia late-M and L dwarfs
Caballero, J. A.; Montes, D.; Sarro, L. M. +20 more
As part of our comprehensive, ongoing characterization of the low-mass end of the main sequence in the Solar neighbourhood, we used the OSIRIS instrument at the 10.4 m Gran Telescopio Canarias to acquire low- and mid-resolution (R
Search for protostellar jets with UWISH2 in the molecular cloud complexes Vulpecula and IRDC G53.2
Tej, Anandmayee; Froebrich, Dirk; Samal, Manash +1 more
Jets and outflows are the early signposts of stellar birth. Using the UKIRT Wide Field Infrared Survey for H2 (UWISH2) at 2.12 µm, 127 outflows are identified in molecular cloud complexes Vulpecula OB1 and IRDC G53.2 covering 12 square degrees of the Galactic plane. Using multiwavelength data sets, from 1.2 to 70 µm, 79 youn…
The infalling elliptical galaxy M89: the chemical composition of the AGN disturbed hot atmosphere
Werner, Norbert; Mernier, François; Ercan, E. Nihal +4 more
The chemical enrichment of X-ray-emitting hot atmospheres has hitherto been primarily studied in galaxy clusters. These studies revealed relative abundances of heavy elements that are remarkably similar to Solar. Here, we present measurements of the metal content of M89 (NGC 4552), an elliptical galaxy infalling into the Virgo cluster with a ~10 k…
H2 molecular gas in the old planetary nebula NGC 3587
Guerrero, M. A.; Toalá, J. A.; Ramos-Larios, G. +2 more
The acquisition of high-quality deep images of planetary nebulae (PNe) has allowed the detection of a wealth of small-scale features, which highlight the complexity of the formation history and physical processes shaping PNe. Here we present the discovery of three groups of clumps embedded within the nebular shell of the evolved PN NGC 3587, the O…