Search Publications
Resolved CO(1-0) Emission and Gas Properties in Luminous Dusty Star-forming Galaxies at z = 2-4
Berta, S.; Ivison, R. J.; Omont, A. +15 more
We present the results of a survey of CO(1-0) emission in 14 infrared luminous dusty star-forming galaxies (DSFGs) at 2 < z < 4 with the NSF's Karl G. Jansky Very Large Array. All sources are detected in 12CO(1-0), with an angular resolution of ~1″. Seven sources show extended and complex structure. We measure CO luminosities of $…
The role of radial migration in open cluster and field star populations with Gaia DR3
Randich, S.; Spina, L.; Magrini, L. +4 more
Context. The survival time of a star cluster depends on its total mass, density, and thus size, as well as on the environment in which it was born and in which lies. Its dynamical evolution is influenced by various factors such as gravitational effects of the Galactic bar, spiral structures, and molecular clouds. Overall, the factors that determin…
MeerKAT's view of double radio relic galaxy cluster Abell 3376
Nakanishi, Hiroyuki; Akamatsu, Hiroki; Takeuchi, Tsutomu T. +10 more
We present the initial results of our MeerKAT L-band observations of Abell 3376. We achieved higher (5″) angular resolution and better (~4 µ Jy beam-1) sensitivity compared to the previous observations. Our achieved sensitivity is only a factor of 2 larger than the thermal noise of MeerKAT. Astrometric and flux comparison of discr…
On the Origin of the North Celestial Pole Loop
Martin, Peter G.; Marchal, Antoine
The North Celestial Pole Loop (NCPL) provides a unique laboratory for studying the early-stage precursors of star formation. Uncovering its origin is key to understanding the dynamical mechanisms that control the evolution of its contents. In this study, we explore the 3D geometry and the dynamics of the NCPL using high-resolution dust extinction …
Introducing the Condor Array Telescope. I. Motivation, Configuration, and Performance
Walter, Frederick M.; Shara, Michael M.; Lanzetta, Kenneth M. +4 more
The "Condor Array Telescope" or "Condor" is a high-performance "array telescope" comprised of six apochromatic refracting telescopes of objective diameter 180 mm, each equipped with a large-format, very low-read-noise (≈1.2 e-), very rapid-read-time (<1 s) CMOS camera. Condor is located at a very dark astronomical site in the southwe…
Magnetic fluxes of solar active regions of different magneto-morphological classes - I. Cyclic variations
Abramenko, Valentina I.; Suleymanova, Regina A.; Zhukova, Anastasija V.
Data for 3046 solar active regions (ARs) observed since 1996 May 12 to 2021 December 27 were utilized to explore how the magnetic fluxes from ARs of different complexity follow the solar cycle. Magnetograms from the Michelson Doppler Imager instrument on the Solar and Heliospheric Observatory and from the Helioseismic and Magnetic Imager instrumen…
Gaia DR3 features of the phase spiral and its possible relation to internal perturbations
Li, Chengdong; Siebert, Arnaud; Famaey, Benoit +2 more
Disc stars from the Gaia DR3 RVS catalogue are selected to explore the phase spiral in the Galaxy. The data reveal a two-armed phase spiral pattern in the local z-vz plane inside the solar radius, which appears clearly when colour-coded by ⟨vR⟩(z, vz): this is characteristic of a breathing mode that can in principl…
A brown dwarf donor and an optically thin accretion disc with a complex stream impact region in the period-bouncer candidate BW Sculptoris
Neustroev, Vitaly V.; Mäntynen, Iikka
We present an analysis of multi-epoch spectroscopic and photometric observations of the WZ Sge-type dwarf nova BW Scl, a period-bouncer candidate. We detected multiple irradiation-induced emission lines from the donor star allowing the radial velocity variations to be measured with high accuracy. Also, using the absorption lines Mg II 4481 Å and C…
Gaia Data Release 3. Surface brightness profiles of galaxies and host galaxies of quasars
Ducourant, C.; Gavras, P.; Pourbaix, D. +13 more
Context. Since July 2014, the Gaia space mission has been continuously scanning the sky and observing the extragalactic Universe with unprecedented spatial resolution in the optical domain (∼180 mas by the end of the mission). Gaia provides an opportunity to study the morphology of the galaxies of the local Universe (z < 0.45) with much higher …
Characterising fast-time variations in the hard X-ray time profiles of solar flares using Solar Orbiter's STIX
Krucker, Säm; Harra, Louise K.; Hayes, Laura A. +2 more
Aims: The aim of this work is to develop a method to systematically detect and characterise fast-time variations (≳1 s) in the non-thermal hard X-ray (HXR) time profiles of solar flares using high-resolution data from Solar Orbiter's Spectrometer/Telescope for Imaging X-rays (STIX).
Methods: The HXR time profiles were smoothed using Gaus…