Search Publications
Characterizing the morphology of the debris disk around the low-mass star GSC 07396-00759
Bayo, A.; Ginski, C.; Henning, Th. +17 more
Context. Debris disks have commonly been studied around intermediate-mass stars. Their intense radiation fields are believed to efficiently remove the small dust grains that are constantly replenished by collisions. For lower-mass central objects, in particular M stars, the dust removal mechanism needs to be further investigated given the much wea…
Ion Outflow and Escape in the Terrestrial Magnetosphere: Cluster Advances
Dandouras, Iannis
Cluster was the first mission in the terrestrial magnetosphere to involve four spacecraft in a tetrahedral configuration, providing three-dimensional measurements of the space plasma parameters. Cluster was also equipped with a very comprehensive instrumentation, allowing the measurement of the ion populations outflowing from the ionosphere, their…
Proper Plasma Analysis Practice (PPAP), an Integrated Procedure of Extinction Correction and Plasma Diagnostics: A Demo with an HST/WFC3 Image Set of NGC 6720
Ueta, Toshiya; Otsuka, Masaaki
In this work, we propose a proper plasma analysis practice (PPAP), an updated procedure of plasma diagnostics in the era of spatially resolved spectroscopy. In particular, we emphasize the importance of performing both of the extinction correction and the direct method of plasma diagnostics simultaneously as an integrated process. This approach is…
Measuring the Average Molecular Gas Content of Star-forming Galaxies at z = 3-4
Carilli, Chris; Feltre, Anna; Bacon, Roland +15 more
We study the molecular gas content of 24 star-forming galaxies at z = 3-4, with a median stellar mass of 109.1 M⊙, from the MUSE Hubble Ultra Deep Field (HUDF) Survey. Selected by their Lyα λ1216 emission and HF160W-band magnitude, the galaxies show an average $\langle {\mathrm{EW}}_{\mathrm{Ly}\alpha }^{0}\rangle …
GRB 191016A: A Long Gamma-Ray Burst Detected by TESS
Barclay, Thomas; Daylan, Tansu; Fausnaugh, Michael +8 more
The Transiting Exoplanet Survey Satellite (TESS) exoplanet-hunting mission detected the rising and decaying optical afterglow of GRB 191016A, a long gamma-ray burst (GRB) detected by Swift-BAT but without prompt XRT or UVOT follow-up due to proximity to the Moon. The afterglow has a late peak at least 1000 s after the BAT trigger, with a brightest…
Water and methanol ice in L 1544
Alves, J.; Caselli, P.; Jiménez-Serra, I. +4 more
Context. Methanol and complex organic molecules have been found in cold starless cores, where a standard warm-up scenario would not work because of the absence of heat sources. A recent chemical model attributed the presence of methanol and large organics to the efficient chemical desorption and a class of neutral-neutral reactions that proceed fa…
A titanic interstellar medium ejection from a massive starburst galaxy at redshift 1.4
Calabrò, Antonello; Circosta, Chiara; Perna, Michele +12 more
Feedback-driven winds from star formation or active galactic nuclei might be a relevant channel for the abrupt quenching of star formation in massive galaxies. However, both observations and simulations support the idea that these processes are non-conflictingly co-evolving and self-regulating. Furthermore, evidence of disruptive events that are c…
Hot planets around cool stars - two short-period mini-Neptunes transiting the late K-dwarf TOI-1260
Fridlund, M.; Guenther, E. W.; Barragán, O. +56 more
We present the discovery and characterization of two sub-Neptunes in close orbits, as well as a tentative outer planet of a similar size, orbiting TOI-1260 - a low metallicity K6 V dwarf star. Photometry from Transiting Exoplanet Survey Satellite(TESS) yields radii of Rb = 2.33 ± 0.10 and Rc = 2.82 ± 0.15 R⊕, and p…
The HST See Change Program. I. Survey Design, Pipeline, and Supernova Discoveries
Richard, Johan; Muzzin, Adam; Hoekstra, Henk +53 more
The See Change survey was designed to make z > 1 cosmological measurements by efficiently discovering high-redshift Type Ia supernovae (SNe Ia) and improving cluster mass measurements through weak lensing. This survey observed twelve galaxy clusters with the Hubble Space Telescope (HST) spanning the redshift range z = 1.13-1.75, discovering 57 …
The reduced proper motion selected halo: Methods and description of the catalogue
Helmi, Amina; Koppelman, Helmer H.
Context. The Gaia mission has provided the largest ever astrometric chart of the Milky Way. Using it to map the Galactic halo is helpful for disentangling its merger history.
Aims: The identification of halo stars in Gaia DR2 with reliable distance estimates requires special methods because such stars are typically farther away and scarce.