Search Publications
A ∼15 kpc outflow cone piercing through the halo of the blue compact metal-poor galaxy SBS 0335-052E
Östlin, G.; Hayes, M.; Monreal-Ibero, A. +11 more
Context. Outflows from low-mass star-forming galaxies are a fundamental ingredient for models of galaxy evolution and cosmology. Despite seemingly favourable conditions for outflow formation in compact starbursting galaxies, convincing observational evidence for kiloparsec-scale outflows in such systems is scarce.
Aims: The onset of kiloparse…
Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems. II. PHOENIX spherically symmetric stellar atmosphere models
Southworth, J.; Claret, A.
Context. The phenomenon of limb-darkening is relevant to many topics in astrophysics, including the analysis of light curves of eclipsing binaries, optical interferometry, measurement of stellar diameters, line profiles of rotating stars, gravitational microlensing, and transits of extrasolar planets
Aims: Multiple parametric limb-darkening l…
Deep X-Ray and Radio Observations of the First Outburst of the Young Magnetar Swift J1818.0-1607
Campana, S.; Tiengo, A.; Götz, D. +23 more
Swift J1818.0-1607 is a radio-loud magnetar with a spin period of 1.36 s and a dipolar magnetic field strength of B ~ 3 × 1014 G, which is very young compared to the Galactic pulsar population. We report here on the long-term X-ray monitoring campaign of this young magnetar using XMM-Newton, NuSTAR, and Swift from the activation of its …
Morphological Parameters and Associated Uncertainties for 8 Million Galaxies in the Hyper Suprime-Cam Wide Survey
Kartaltepe, Jeyhan S.; Nagai, Daisuke; Natarajan, Priyamvada +10 more
We use the Galaxy Morphology Posterior Estimation Network (GaMPEN) to estimate morphological parameters and associated uncertainties for ~8 million galaxies in the Hyper Suprime-Cam Wide survey with z ≤ 0.75 and m ≤ 23. GaMPEN is a machine-learning framework that estimates Bayesian posteriors for a galaxy's bulge-to-total light ratio (L B
The Possible Cause of Most Intense Geomagnetic Superstorm of the 21st Century on 20 November 2003
Bhaskar, Ankush; Vemareddy, P.; Raghav, Anil +6 more
An extreme geomagnetic storm has the potential to affect various technologies and activities in space and on the ground, e.g., power grids, oil and gas industries, communications, ground transportation, satellite infrastructure, global navigation satellite systems, aviation, etc. Therefore, it is considered a major source of risk by various govern…
The Corona Australis star formation complex is accelerating away from the Galactic plane
Meingast, Stefan; Alves, João; Zucker, Catherine +5 more
We study the kinematics of the recently discovered Corona Australis (CrA) chain of clusters by examining the 3D space motion of its young stars using Gaia DR3 and APOGEE-2 data. While we observe linear expansion between the clusters in the Cartesian XY directions, the expansion along Z exhibits a curved pattern. To our knowledge, this is the first…
The Pristine Inner Galaxy Survey (PIGS) VII: a discovery of the first inner Galaxy CEMP-r/s star
Sestito, F.; González Hernández, J. I.; Arentsen, A. +7 more
Well-studied very metal-poor (VMP, [Fe/H] <-2) stars in the inner Galaxy are few in number, and they are of special interest because they are expected to be among the oldest stars in the Milky Way. We present high-resolution spectroscopic follow-up of the carbon-enhanced metal-poor (CEMP) star Pristine_184237.56-260624.5 (hereafter Pr184237) id…
Linking the dust and chemical evolution: Taurus and Perseus. New collisional rates for HCN, HNC, and their C, N, and H isotopologues
Roueff, E.; Sarazin, C. L.; Kramer, C. +18 more
Context. HCN, HNC, and their isotopologues are ubiquitous molecules that can serve as chemical thermometers and evolutionary tracers to characterize star-forming regions. Despite their importance in carrying information that is vital to studies of the chemistry and evolution of star-forming regions, the collision rates of some of these molecules h…
Evidence for lunar tide effects in Earth's plasmasphere
Zong, Qiugang; Guo, Ruilong; Xiao, Chao +18 more
Tides are universal and affect spatially distributed systems, ranging from planetary to galactic scales. In the Earth-Moon system, effects caused by lunar tides were reported in the Earth's crust, oceans, neutral gas-dominated atmosphere (including the ionosphere) and near-ground geomagnetic field. However, whether a lunar tide effect exists in th…
A Diverse Population of z 2 ULIRGs Revealed by JWST Imaging
Wang, T.; Rigopoulou, D.; Yan, Haojing +12 more
Four ultraluminous infrared galaxies (ULIRGs) observed with JWST/NIRcam in the Cosmos Evolution Early Release Science program offer an unbiased preview of the z ~ 2 ULIRG population. The objects were originally selected at 24 µm and have strong polycyclic aromatic hydrocarbon emission features observed with Spitzer/Infrared Spectrometer. The…