Search Publications
A Candidate Dual QSO at Cosmic Noon
Lacy, Mark; Comerford, Julia M.; Simmons, Brooke D. +6 more
We report the discovery of a candidate dual QSO at z = 1.889, a redshift that is in the era known as "cosmic noon" where most of the universe's black hole and stellar mass growth occurred. The source was identified in Hubble Space Telescope WFC3/IR images of a dust-reddened QSO that showed two closely separated point sources at a projected distanc…
Source positions of an interplanetary type III radio burst and anisotropic radio-wave scattering
Maksimovic, Milan; Kontar, Eduard P.; Chen, Xingyao +7 more
Interplanetary solar radio type III bursts provide the means to remotely study and track energetic electrons propagating in the interplanetary medium. Due to the lack of direct radio source imaging, several methods have been developed to determine the source positions from space-based observations. Moreover, none of the methods consider the propag…
Simulated Observations of Star Formation Regions: Infrared Evolution of Globally Collapsing Clouds
Baes, Maarten; Fritz, Jacopo; Lin, Yuxin +6 more
A direct comparison between hydrodynamical simulations and observations is needed to improve the physics included in the former and to test biases in the latter. Post-processing radiative transfer and synthetic observations are now the standard way to do this. We report on the first application of the SKIRT radiative-transfer code to simulations o…
Ancient alluvial plains at Oxia Planum, Mars
Fawdon, Peter; Thomas, Nicolas; Grindrod, Peter M. +4 more
The geologic origin of the ancient, phyllosilicate-bearing bedrock at Oxia Planum, Mars, the ExoMars rover landing site, is unknown. The phyllosilicates record ancient aqueous processes, but the processes that formed the host bedrock remain elusive. Here, we use high-resolution orbital and topographic datasets from the HiRISE, CaSSIS and CTX instr…
VISIONS: the VISTA Star Formation Atlas. I. Survey overview
Meingast, Stefan; Alves, João; Rottensteiner, Alena +37 more
VISIONS is an ESO public survey of five nearby (d < 500 pc) star-forming molecular cloud complexes that are canonically associated with the constellations of Chamaeleon, Corona Australis, Lupus, Ophiuchus, and Orion. The survey was carried out with the Visible and Infrared Survey Telescope for Astronomy (VISTA), using the VISTA Infrared Camera …
Update of the INTEGRAL/IBIS active galactic nuclei catalogue: Deeper on the Galactic plane and wider beyond
Palazzi, E.; Masetti, N.; Bird, A. J. +7 more
In this work we have updated the list of active galactic nuclei (AGN) detected by INTEGRAL taking into account the new objects listed in the last published INTEGRAL/IBIS survey. We have collected 83 new AGN, increasing the number of INTEGRAL-detected active galaxies (436) by 19%. Half of these new additions are located behind the Galactic plane, a…
SPar: Estimating Stellar Parameters from Multiband Photometries with Empirical Stellar Libraries
Yang, Ming; Chen, Bingqiu; Zhao, He +3 more
Modern large-scale photometric surveys have provided us with multiband photometries of billions of stars. Determining the stellar atmospheric parameters, such as the effective temperature (T eff) and metallicities ([Fe/H]), absolute magnitudes (M G ), distances (d), and reddening values (E(G BP - G RP))…
Extragalactic CO emission lines in the CMB experiments: A forgotten signal and a foreground
Lagache, Guilaine; Pullen, Anthony R.; Maniyar, Abhishek S. +3 more
High resolution cosmic microwave background (CMB) experiments have allowed us to precisely measure the CMB temperature power spectrum down to very small scales (multipole ℓ∼3000 ). Such measurements at multiple frequencies enable separating the power spectrum of the primary CMB anisotropies with the power spectrum of other signals like CMB lensing…
Observed UV Continuum Slopes (β) of Galaxies at z = 0.40-0.75 in the GOODS-North Field
Saha, Kanak; Windhorst, Rogier A.; Jansen, Rolf A. +1 more
We estimate the UV continuum slope (β) of 465 galaxies (with luminosities of 0.028-3.3 ${L}_{z=0.5}^{* }$ ) in the Great Observatories Origins Survey Northern field in the redshift range z = 0.40-0.75. We use two AstroSat/UVIT (N242W, N245M) bands, two Hubble Space Telescope (F275W, F336W) bands, and a KPNO (U) band to sample the UV continuum slop…
Morphologies and Central Stars of Planetary Nebulae in the Galactic bulge from VLT, HST and Pan-STARRS imaging
Parker, Quentin A.; Ritter, Andreas; Zijlstra, Albert +1 more
This is the first in a series of papers that present sets of different results for 136 compact, known planetary nebulae within a 10 × 10 degree region of the Galactic bulge. We use a large, previously unpublished sample of our own extensive ESO 8-m VLT deep imaging and spectroscopic data. This is combined with archival deep Hubble Space Telescope …