Search Publications
Identifying Lyα emitter candidates with Random Forest: Learning from galaxies in the CANDELS survey
Castellano, M.; Pentericci, L.; Fynbo, J. P. U. +8 more
The physical processes that make a galaxy a Lyman alpha emitter have been extensively studied over the past 25 yr. However, the correlations between physical and morphological properties of galaxies and the strength of the Lyα emission line are still highly debated. Here, we investigate the correlations between the rest-frame Lyα equivalent width …
The Dragonfly Galaxy. III. Jet Brightening of a High-redshift Radio Source Caught in a Violent Merger of Disk Galaxies
Prochaska, J. Xavier; De Breuck, Carlos; Burchett, Joseph N. +8 more
The Dragonfly galaxy (MRC 0152-209), the most infrared-luminous radio galaxy at redshift z ~ 2, is a merger system containing a powerful radio source and large displacements of gas. We present kiloparsec-resolution data from the Atacama Large Millimeter/submillimeter Array and the Very Large Array of carbon monoxide (6-5), dust, and synchrotron co…
A sub-Neptune planet around TOI-1695 discovered and characterized with SPIRou and TESS
Carmona, A.; Donati, J. -F.; Winn, J. N. +39 more
TOI-1695 is a V-mag = 13 M-dwarf star from the northern hemisphere at 45 pc from the Sun, around which a 3.134-day periodic transit signal from a super-Earth candidate was identified in TESS photometry. With a transit depth of 1.3 mmag, the radius of candidate TOI-1695.01 was estimated by the TESS pipeline to be 1.82 R⊕ with an equilibr…
The Large Array Survey Telescope-Pipeline. I. Basic Image Reduction and Visit Coaddition
Fallah Ramazani, V.; Ofek, E. O.; Ben-Ami, S. +18 more
The Large Array Survey Telescope (LAST) is a wide-field telescope designed to explore the variable and transient sky with a high cadence and to be a test-bed for cost-effective telescope design. A LAST node is composed of 48 (32 already deployed), 28 cm f/2.2 telescopes. A single telescope has a 7.4 deg2 field of view and reaches a 5σ l…
Progenitors and explosion properties of supernova remnants hosting central compact objects: II. A global systematic study with a comparison to nucleosynthesis models
Fryer, C. L.; Safi-Harb, S.; Braun, C. +1 more
Core-collapse explosions of massive stars leave behind neutron stars, with a known diversity that includes the 'Central Compact Objects' (CCOs). Typified by the neutron star discovered near the centre of the Cas A supernova remnant (SNR), CCOs have been observed to shine only in X-rays. To address their supernova progenitors, we perform a systemat…
The Impact of Multifluid Effects in the Solar Chromosphere on the Ponderomotive Force under SE and NEQ Ionization Conditions
Testa, Paola; Martínez-Sykora, Juan; De Pontieu, Bart +3 more
The ponderomotive force has been suggested to be the main mechanism to produce the so-called first ionization potential (FIP) effect-the enrichment of low-FIP elements observed in the outer solar atmosphere, in the solar wind, and in solar energetic events. It is well known that the ionization of these elements occurs within the chromosphere. Ther…
A closer look at the binary content of NGC 1850
Dreizler, S.; Usher, C.; Bastian, N. +7 more
Studies of young clusters have shown that a large fraction of O-/early B-type stars are in binary systems, where the binary fraction increases with mass. These massive stars are present in clusters of a few Myr, but gradually disappear for older clusters. The lack of detailed studies of intermediate-age clusters has meant that almost no informatio…
Infall and outflow towards high-mass starless clump candidates
Leurini, S.; Traficante, A.; Wyrowski, F. +6 more
The evolutionary sequence for high-mass star formation starts with massive starless clumps that go on to form protostellar, young stellar objects and then compact H II regions. While there are many examples of the three later stages, the very early stages have proved to be elusive. We follow-up a sample of 110 mid-infrared dark clumps selected fro…
Period-Luminosity Relations for Galactic Classical Cepheids in the Sloan Bands
Gieren, Wolfgang; Pietrzyński, Grzegorz; Graczyk, Dariusz +6 more
We present the first period-luminosity (PL) and period-Wesenheit (PW) relations in the Sloan-Pan-STARRS g P1 r P1 i P1 bands for classical fundamental-mode Cepheids in the Milky Way. We used a relatively modest number of 76 stars for the PL and 84-85 stars for the PW relations calibration. The data for the proje…
White Dwarfs Revealed in Gaia's Candidate Compact Object Binaries
Chatterjee, Sourav; Nayak, Prasanta K.; Ganguly, Anindya
Discovery and characterization of black holes (BHs), neutron stars (NSs), and white dwarfs (WDs) with detached luminous companions (LCs) in wide orbits are exciting because they are important test beds for dark remnant (DR) formation physics as well as binary stellar evolution models. Recently, 187 candidates have been identified from Gaia's non-s…