Search Publications
SNAD catalogue of M-dwarf flares from the Zwicky Transient Facility
Voloshina, A. S.; Lavrukhina, A. D.; Pruzhinskaya, M. V. +12 more
Most of the stars in the Universe are M spectral class dwarfs, which are known to be the source of bright and frequent stellar flares. In this paper, we propose new approaches to discover M-dwarf flares in ground-based photometric surveys. We employ two approaches: a modification of a traditional method of parametric fit search and a machine learn…
Polycyclic aromatic hydrocarbon luminous galaxies in JWST CEERS data
Kilerci, Ece; Hashimoto, Tetsuya; Goto, Tomotsugu +9 more
It has been an unanswered question how many dusty galaxies have been undetected from the state-of-the-art observational surveys. JWST enables us to detect faint infrared (IR) galaxies that have prominent polycyclic aromatic hydrocarbon (PAH) features in the mid-IR wavelengths. PAH is a valuable tracer of star formation and dust properties in the m…
Narrow absorption line outflow in Seyfert 1 galaxy J1429+4518: outflow's distance from the central source and its energetics
Arav, N.; Dehghanian, M.; Walker, G. +2 more
In the Hubble Space Telescope/Cosmic Origins Spectrograph spectrum of the Seyfert 1 galaxy 2MASX J14292507+4518318, we have identified a narrow absorption line outflow system with a velocity of -151 km s-1. This outflow exhibits absorption troughs from the resonance states of ions like C IV, N V, S IV, and Si II, as well as excited stat…
Searching for magnetar binaries disrupted by core-collapse supernovae
El-Badry, Kareem; Connor, Liam; Sharma, Kritti +5 more
Core-collapse supernovae (CCSNe) are considered the primary magnetar formation channel, with 15 magnetars associated with supernova remnants (SNRs). A large fraction of these should occur in massive stellar binaries that are disrupted by the explosion, meaning that $\sim 45~{{\ \rm per\ cent}}$ of magnetars should be nearby high-velocity stars. He…
The missing radial velocities of Gaia: a catalogue of Bayesian estimates for DR3
Widmark, Axel; Naik, Aneesh P.
In an earlier work, we demonstrated the effectiveness of Bayesian neural networks in estimating the missing line-of-sight velocities of Gaia stars, and published an accompanying catalogue of blind predictions for the line-of-sight velocities of stars in Gaia DR3. These were not merely point predictions, but probability distributions reflecting our…
ATCA study of Small Magellanic Cloud supernova remnant 1E 0102.2-7219
Haberl, F.; Hill, T.; Filipović, M. D. +29 more
We present new and archival Australia Telescope Compact Array and Atacama Large Millimeter/submillimeter Array data of the Small Magellanic Cloud supernova remnant 1E 0102.2-7219 at 2100, 5500, 9000, and 108 000 MHz; as well as H I data provided by the Australian Square Kilometre Array Pathfinder. The remnant shows a ring-like morphology with a me…
Investigating the hard state of MAXI J1820 + 070: a comprehensive Bayesian approach to black hole spin and accretion properties
Vaughan, Simon; Dias, Sachin D.; Lefkir, Mehdy +1 more
We analyse the X-ray spectrum of the black hole (BH) X-ray binary MAXI J1820 + 070 using observations from XMM-Newton and NuSTAR during 'hard' states of its 2018-2019 outburst. We take a fully Bayesian approach, and this is one of the first papers to present a fully Bayesian workflow for the analysis of an X-ray binary X-ray spectrum. This allows …
A New Enigmatic Radio Relic in the Low-mass Cluster Abell 2108
Kale, Ruta; Rahaman, Majidul; Datta, Abhirup +2 more
We report the discovery of a radio relic in the north-eastern periphery of the galaxy cluster Abell 2108 (A2108). A2108 is part of the uGMRT LOw-MAss Galaxy Cluster Survey (GLOMACS), where our main aim is to search for diffuse radio emission signatures in very sparsely explored low-mass galaxy clusters using uGMRT band-3 (central frequency 400 MHz…
Gaia search for (sub)stellar companions of exoplanet hosts
Mugrauer, Markus; Michel, Kai-Uwe
We conduct a survey, which explores the data releases of the European Space Agency (ESA)-Gaia mission, in order to investigate the multiplicity of exoplanet hosts at distances of less than 625 pc around the Sun. With the accurate Gaia astrometry we are able to detect stellar and substellar companions of exoplanet hosts by proving the equidistance …
Cliff collapse on Comet 67P/Churyumov-Gerasimenko - I. Aswan
Davidsson, Björn J. R.
The Aswan cliff on Comet 67P/Churyumov-Gerasimenko collapsed on 2015 July 10. Thereby, relatively pristine comet material from a depth of $\sim 12\, \mathrm{m}$ was exposed at the surface. Observations of the collapse site by the microwave instrument Rosetta/Microwave Instrument for Rosetta Orbiter (MIRO) have been retrieved from 8 months prior to…