Search Publications
Dust Properties of C II Detected z ∼ 5.5 Galaxies: New HST/WFC3 Near-IR Observations
Kartaltepe, J. S.; Scoville, N. Z.; Riechers, D. A. +7 more
We examine the rest-frame ultraviolet (UV) properties of 10 [C II]λ158 µm-detected galaxies at z ∼ 5.5 in COSMOS using new Hubble Space Telescope/Wide Field Camera 3 near-infrared imaging. Together with pre-existing 158 µm continuum and [C II] line measurements by the Atacama Large Millimeter/submillimeter Array, we study their dust at…
Titan's Topography and Shape at the End of the Cassini Mission
Hayes, A. G.; Iess, L.; Stiles, B. W. +6 more
With the conclusion of the Cassini mission, we present an updated topographic map of Titan, including all the available altimetry, SARtopo, and stereophotogrammetry topographic data sets available from the mission. We use radial basis functions to interpolate the sparse data set, which covers only ∼9% of Titan's global area. The most notable updat…
SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES): Faint-end Counts at 450 µm
Goto, Tomotsugu; Smail, Ian; Bunker, Andrew J. +40 more
The SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES) is a three-year JCMT Large Program aiming to reach the 450 µm confusion limit in the COSMOS-CANDELS region to study a representative sample of the high-redshift far-infrared galaxy population that gives rise to the bulk of the far-infrared background. We present the first-year data from STU…
Comprehensive Analysis of the Geoeffective Solar Event of 21 June 2015: Effects on the Magnetosphere, Plasmasphere, and Ionosphere Systems
Fineschi, Silvano; Stangalini, Marco; Bruno, Roberto +34 more
A full-halo coronal mass ejection (CME) left the Sun on 21 June 2015 from active region (AR) NOAA 12371. It encountered Earth on 22 June 2015 and generated a strong geomagnetic storm whose minimum Dst value was −204 nT. The CME was associated with an M2-class flare observed at 01:42 UT, located near disk center (N12 E16). Using satellite data from…
On the initial binary population for star cluster simulations
Kroupa, Pavel; Belloni, Diogo; Rocha-Pinto, Helio J. +2 more
Colour-magnitude diagrams (CMDs) are powerful tools that might be used to infer stellar properties in globular clusters (GCs), for example, the binary fraction and their mass ratio (q) distribution. In the past few years, observations have revealed that q distributions of GC main-sequence binaries are generally flat, and a distribution characteriz…
Globular clusters with Gaia
Marinoni, S.; Pancino, E.; Bellazzini, M. +1 more
The treatment of crowded fields in Gaia data will only be a reality in a few years from now. In particular, for globular clusters, only the end-of-mission data (public in 2022-2023) will have the necessary full crowding treatment and will reach sufficient quality for the faintest stars. As a consequence, the work on the deblending and decontaminat…
The State-of-the-art HST Astro-photometric Analysis of the Core of ω Centauri. III. The Main Sequence's Multiple Populations Galore
Anderson, J.; Milone, A. P.; Marino, A. F. +5 more
We take advantage of the exquisite quality of the Hubble Space Telescope 26-filter astro-photometric catalog of the core of ω Cen presented in the first paper of this series and the empirical differential-reddening correction presented in the second paper in order to distill the main sequence into its constituent populations. To this end, we restr…
On-Disc Observations of Flux Rope Formation Prior to Its Eruption
Palmerio, E.; van Driel-Gesztelyi, L.; Kilpua, E. K. J. +6 more
Coronal mass ejections (CMEs) are one of the primary manifestations of solar activity and can drive severe space weather effects. Therefore, it is vital to work towards being able to predict their occurrence. However, many aspects of CME formation and eruption remain unclear, including whether magnetic flux ropes are present before the onset of er…
Population synthesis to constrain Galactic and stellar physics. I. Determining age and mass of thin-disc red-giant stars
Reylé, C.; Robin, A. C.; Lagarde, N. +1 more
Context. The cornerstone mission of the European Space Agency, Gaia, together with forthcoming complementary surveys (CoRoT, Kepler, K2, APOGEE, and Gaia-ESO), will revolutionize our understanding of the formation and history of our Galaxy, providing accurate stellar masses, radii, ages, distances, as well as chemical properties for a very large s…
Variable H13CO+ Emission in the IM Lup Disk: X-Ray Driven Time-dependent Chemistry?
Cleeves, L. Ilsedore; Bergin, Edwin A.; Öberg, Karin I. +3 more
We report the first detection of a substantial brightening event in an isotopologue of a key molecular ion, HCO+, within a protoplanetary disk of a T Tauri star. The H13CO+ J=3-2 rotational transition was observed three times toward IM Lup between 2014 July and 2015 May with the Atacama Large Millimeter/submillimet…