Search Publications
Missions
Journals
Publication Years
Magnetar spin-down glitch clearing the way for FRB-like bursts and a pulsed radio episode
Lin, L.; Kouveliotou, C.; Baring, M. G. +16 more
Magnetars are a special subset of the isolated neutron star family, with X-ray and radio emission mainly powered by the decay of their immense magnetic fields. Many attributes of magnetars remain poorly understood: spin-down glitches or the sudden reductions in the star's angular momentum, radio bursts reminiscent of extragalactic fast radio burst…
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…
Evidence for Hidden Nearby Companions to Hot Jupiters
Rice, Malena; Wang, Songhu; Wu, Dong-Hong
The first discovered extrasolar worlds-giant, "hot Jupiter" planets on short-period orbits-came as a surprise to solar system-centric models of planet formation, prompting the development of new theories for planetary system evolution. The near absence of observed nearby planetary companions to hot Jupiters has been widely quoted as evidence in su…
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…
A dense ring of the trans-Neptunian object Quaoar outside its Roche limit
Olofsson, G.; Pagano, I.; Dhillon, V. S. +56 more
Planetary rings are observed not only around giant planets1, but also around small bodies such as the Centaur Chariklo2 and the dwarf planet Haumea3. Up to now, all known dense rings were located close enough to their parent bodies, being inside the Roche limit, where tidal forces prevent material with reasonable d…
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 '…
Dusty-wind-clear JWST Super-early Galaxies
Ferrara, Andrea; Fiore, Fabrizio; Travascio, Andrea +2 more
The JWST discovery of a number of super-early (redshift z > 10) blue galaxies requires these systems to be essentially dust free in spite of their large stellar masses. A possible explanation is that dust is evacuated by radiatively driven outflows. We test this hypothesis by deriving the Eddington ratio λ E = L bol/L
Identifying LISA verification binaries among the Galactic population of double white dwarfs
Korol, Valeriya; Moore, Christopher J.; Vecchio, Alberto +7 more
Double white dwarfs (DWDs) will be the most numerous gravitational-wave (GW) sources for the Laser Interferometer Space Antenna (LISA). Most of the Galactic DWDs will be unresolved and will superpose to form a confusion noise foreground, the dominant LISA noise source around ${\sim} 0.5\!-\!3\, \mathrm{mHz}$ . A small fraction of these sources wil…
MINDS. Abundant water and varying C/O across the disk of Sz 98 as seen by JWST/MIRI
Henning, Thomas; Östlin, Göran; Güdel, Manuel +41 more
Context. The Mid-InfraRed Instrument (MIRI) Medium Resolution Spectrometer (MRS) on board the James Webb Space Telescope (JWST) allows us to probe the inner regions of protoplanetary disks, where the elevated temperatures result in an active chemistry and where the gas composition may dictate the composition of planets forming in this region. The …
What if young z > 9 JWST galaxies hosted massive black holes?
Volonteri, Marta; Habouzit, Mélanie; Colpi, Monica
JWST is discovering star-forming 'candidate' galaxies with photometric redshifts z > 9 and little attenuation. We model presumptive massive black holes (MBHs) in such galaxies and find that their unobscured emission is fainter than the galaxy starlight in JWST filters, and difficult to be detected via colour-colour selection, and X-ray and radi…