Search Publications
Evidence for an abundant old population of Galactic ultra-long period magnetars and implications for fast radio bursts
van der Horst, A. J.; Wadiasingh, Z.; Rajwade, K. M. +3 more
Two recent discoveries, namely PSR J0901-4046 and GLEAM-X J162759.5-523504.3 (hereafter GLEAM-X J1627), have corroborated an extant population of radio-loud periodic sources with long periods (76 and 1091 s, respectively) whose emission can hardly be explained by rotation losses. We argue that GLEAM-X J1627 is a highly magnetized object consistent…
The effect of the deforming dark matter haloes of the Milky Way and the Large Magellanic Cloud on the Orphan-Chenab stream
Lewis, Geraint F.; Erkal, Denis; Bland-Hawthorn, Joss +14 more
It has recently been shown that the Large Magellanic Cloud (LMC) has a substantial effect on the Milky Way's stellar halo and stellar streams. Here, we explore how deformations of the Milky Way and LMC's dark matter haloes affect stellar streams, and whether these effects are observable. In particular, we focus on the Orphan-Chenab (OC) stream whi…
Triage of the Gaia DR3 astrometric orbits - I. A sample of binaries with probable compact companions
Mazeh, T.; Arenou, F.; Faigler, S. +4 more
In preparation for the release of the astrometric orbits of Gaia, Shahaf et al. (2019) proposed a triage technique to identify astrometric binaries with compact companions based on their astrometric semimajor axis, parallax, and primary mass. The technique requires the knowledge of the appropriate mass-luminosity relation to rule out single or clo…
Seeing sharper and deeper: JWST's first glimpse of the photometric and spectroscopic properties of galaxies in the epoch of reionization
Wilkins, Stephen M.; Frye, Brenda L.; Conselice, Christopher J. +12 more
We analyse the photometric and spectroscopic properties of four galaxies in the epoch of reionization (EoR) within the SMACS J0723.3-7327 JWST Early Release Observations field. Given the known spectroscopic redshifts of these sources, we investigated the accuracy with which photometric redshifts can be derived using NIRCam photometry alone, findin…
Accretion geometry of the neutron star low mass X-ray binary Cyg X-2 from X-ray polarization measurements
Antonelli, L. A.; Costa, E.; Bianchi, S. +92 more
We report spectro-polarimetric results of an observational campaign of the bright neutron star low-mass X-ray binary Cyg X-2 simultaneously observed by IXPE, NICER, and INTEGRAL. Consistently with previous results, the broad-band spectrum is characterized by a lower-energy component, attributed to the accretion disc with kTin ≈ 1 keV, p…
Observations of the planetary nebula SMP LMC 058 with the JWST MIRI medium resolution spectrometer
Fox, O. D.; Kavanagh, P. J.; Larson, Kirsten L. +21 more
During the commissioning of JWST, the medium-resolution spectrometer (MRS) on the mid-infrared instrument (MIRI) observed the planetary nebula SMP LMC 058 in the Large Magellanic Cloud. The MRS was designed to provide medium resolution (R = λ/Δλ) 3D spectroscopy in the whole MIRI range. SMP LMC 058 is the only source observed in JWST commissioning…
MUSE Analysis of Gas around Galaxies (MAGG) - IV. The gaseous environment of z 3-4 Ly α emitting galaxies
Prochaska, J. Xavier; Murphy, Michael T.; Fumagalli, Michele +9 more
We study the link between galaxies and H I-selected absorption systems at z ~ 3-4 in the MUSE Analysis of Gas around Galaxies (MAGG) survey, an ESO large programme consisting of integral field spectroscopic observations of 28 quasar fields hosting 61 strong absorbers with $\rm N_{\rm H\,{\small I}}\gtrsim 10^{16.5}~\rm cm^{-2}$. We identify 127 Ly…
The X-ray polarization of the Seyfert 1 galaxy IC 4329A
Antonelli, L. A.; Costa, E.; Bianchi, S. +105 more
We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging X-ray Polarimetry Explorer (IXPE) observed the source for ~500 ks, supported by XMM-Newton (~60 ks) and NuSTAR (~80 ks) exposures. We detect polarization in the 2-8 keV band with 2.97σ confidence. We report a polarization degree of 3.3 ± 1.1 per ce…
Awesome SOSS: transmission spectroscopy of WASP-96b with NIRISS/SOSS
Moran, Sarah E.; MacDonald, Ryan J.; Batalha, Natasha E. +30 more
The future is now - after its long-awaited launch in 2021 December, JWST began science operations in 2022 July and is already revolutionizing exoplanet astronomy. The Early Release Observations (ERO) programme was designed to provide the first images and spectra from JWST, covering a multitude of science cases and using multiple modes of each on-b…
ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions - XV. Steady accretion from global collapse to core feeding in massive hub-filament system SDC335
Zhang, Yong; Tej, Anandmayee; Soam, Archana +37 more
We present ALMA Band-3/7 observations towards 'the Heart' of a massive hub-filament system (HFS) SDC335, to investigate its fragmentation and accretion. At a resolution of ~0.03 pc, 3 mm continuum emission resolves two massive dense cores MM1 and MM2, with $383(^{\scriptscriptstyle +234}_{\scriptscriptstyle -120})$ M⊙ (10-24 % mass of '…