Search Publications
A comprehensive analysis towards the Fermi-LAT source 4FGL J1846.9-0227: jets of a protoplanetary nebula producing γ-rays?
Ortega, M. E.; Paron, S.; Petriella, A.
Most of the $\gamma$-ray sources in the Fermi-LAT 14-yr source catalogue are associated with pulsars and blazars. However, unveiling the nature of the still unassociated $\gamma$-ray sources is important for the understanding of high energy emission mechanisms in astrophysical objects. This work presents a comprehensive study towards the region co…
Concerning SH0ES data: discrepant W0, VI absolute magnitudes for Cepheids in the keystone galaxy NGC4258
Majaess, Daniel
SH0ES VI-band photometry for classical Cepheids in the keystone galaxy NGC4258 yield discrepant absolute magnitudes. Specifically, the 2016 and 2022 published SH0ES Cepheid data for NGC4258 exhibit a substantial offset of ΔW0, VI ≃ 0m.3. That adds to a suite of existing concerns associated with the SH
Modelling JWST mid-infrared counts: excellent consistency with models derived for IRAS, ISO, and Spitzer
Rowan-Robinson, Michael
Models derived in 2009 to fit mid-infrared (8-24 micron) source counts from the IRAS, ISO, and Spitzer missions, provide an excellent fit to deep counts with JWST, demonstrating that the evolution of dusty star-forming galaxies is well understood. The evolution of dust in galaxies at high redshifts is discussed and a simple prescription is propose…
MHz to TeV expectations from scotogenic WIMP dark matter
Siegert, Thomas; Eisenberger, Laura; Mannheim, Karl +1 more
The indirect search for dark matter is typically restricted to individual photon bands and instruments. In the context of multiwavelength observations, finding a weak signal in large foreground and background at only one wavelength band is hampered by systematic uncertainties dominating the signal strength. Dark matter particle annihilation is pro…
Evolution of the dual AGN in Mrk 266: a young AGN and a rotation-dominated disc in the SW nucleus
Stern, Daniel; Comerford, Julia M.; Malkan, Matthew A. +6 more
Dual active galactic nuclei (AGNs) offer a unique opportunity to probe the relationship between supermassive black holes (SMBH) and their host galaxies as well as the role of major mergers in triggering AGN activity. The confirmed dual AGN Mrk 266 has been studied extensively with multiwavelength imaging. Now, high-spatial-resolution IFU spectrosc…
On the dust properties of the UV galaxies in the redshift range z 0.6-1.2
Page, M. J.; Symeonidis, M.; Ferreras, I. +1 more
Far-infrared observations from the Herschel Space Observatory are used to estimate the infrared (IR) properties of ultraviolet-selected galaxies. We stack the PACS (100, 160 $\mu$m) and SPIRE (250, 350, and 500 $\mu$m) maps of the Chandra deep field south (CDFS) on a source list of galaxies selected in the rest-frame ultraviolet (UV) in a redshift…
Structure and large-scale environment of galaxy pairs in the S-PLUS DR4
Schoenell, W.; Kanaan, A.; Ribeiro, T. +8 more
In this paper, we use photometric data from the Southern Photometric Local Universe Survey Data Release 4 survey to identify isolated galaxy pairs and analyse their characteristics and properties. Our results align with previous spectroscopic studies, particularly in luminosity function parameters, suggesting a consistent trait among galaxy system…
Predicting astrometric microlensing events from Gaia Data Release 3
Su, Jie; Wang, Jiancheng; Zhang, Yigong +2 more
Currently, astrometric microlensing is the only tool that can directly measure the mass of a single star; it can also help us to detect compact objects such as isolated neutron stars and black holes. The number of microlensing events that are being predicted and reported is increasing. In this paper, potential lens stars are selected from three ty…
UVIT Study of the MAgellanic Clouds (U-SMAC) - I. Recent star formation history and kinematics of the Shell region in the north-eastern Small Magellanic Cloud
Cioni, Maria-Rosa L.; Subramaniam, Annapurni; Subramanian, Smitha +2 more
The interactions between the Magellanic Clouds significantly affect the shape and distribution of the young stellar population, particularly in the periphery of the Small Magellanic Cloud (SMC). We present the first far-UV (FUV) map of the north-east SMC-Shell region using the Ultra Violet Imaging Telescope (UVIT) onboard AstroSat. The detected FU…
Observational clues to the magnetic evolution of magnetars
Enoto, Teruaki; Makishima, Kazuo; Uchida, Nagomi
Utilizing four archival X-ray data sets taken with the Hard X-ray Detector onboard Suzaku, timing studies were performed on three magnetars, 1E 1841-045 (observed in 2006), SGR 0501+4516 (2008), and 1RXS J170849.0-400910 (2009 and 2010). Their pulsations were reconfirmed, typically in an energy range of 12-50 keV. The 11.783 s pulses of 1E 1841-04…