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Lyman Continuum Emission Escaping from Luminous Green Pea Galaxies at z = 0.5
Malkan, Matthew A.; Malkan, Brian K.
Compact starburst galaxies are thought to include many or most of the galaxies from which substantial Lyman continuum emission can escape into the intergalactic medium. Li & Malkan used Sloan Digital Sky Survey photometry to find a population of such starburst galaxies at z ∼ 0.5. They were discovered by their extremely strong [O III] λλ4959+5…
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - XII. A sample of systems with K2 photometry
Kambe, E.; Maehara, H.; Espinoza, N. +10 more
We present results of the analysis of light and radial velocity (RV) curves of eight detached eclipsing binaries observed by the All-Sky Automated Survey, which we have followed up with high-resolution spectroscopy, and were later observed by the Keplersatellite as part of the K2mission. The RV measurements came from spectra obtained with OAO-188/…
Physical and geometrical parameters of CVBS XIV: the two nearby systems HIP 19206 and HIP 84425
Mardini, Mohammad K.; Al-Wardat, Mashhoor A.; Hussein, Abdallah M. +6 more
Data release 2 (DR2) from the Gaia mission was of great help in precise determination of fundamental parameters of Close Visual Binary and Multiple Systems (CVBMSs), especially masses of their components, which are crucial parameters in understanding formation and evolution of stars and galaxies. This article presents the complete set of fundament…
Solar surges related to UV bursts. Characterization through k-means, inversions, and density diagnostics
Guglielmino, S. L.; Sainz Dalda, A.; Nóbrega-Siverio, D.
Context. Surges are cool and dense ejections typically observed in chromospheric lines and closely related to other solar phenomena such as UV bursts or coronal jets. Even though surges have been observed for decades now, questions regarding their fundamental physical properties such as temperature and density, as well as their impact on upper lay…
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…