Search Publications
Gliese 710 will pass the Sun even closer. Close approach parameters recalculated based on the first Gaia data release
Dybczyński, Piotr A.; Berski, Filip
Context. First results based on Gaia data show that the well-known star Gliese 710 will be the closest flyby star in the next several Myrs and its minimum distance from the Sun will be almost five times smaller than that suggested by pre-Gaia solution.
Aims: The aim of this work is to investigate the proximity parameters and the influence of …
Do siblings always form and evolve simultaneously? Testing the coevality of multiple protostellar systems through SEDs
Fedele, D.; van Dishoeck, E. F.; Murillo, N. M. +1 more
Context. Multiplicity is common in field stars and among protostellar systems. Models suggest two paths of formation: turbulent fragmentation and protostellar disk fragmentation.
Aims: We attempt to find whether or not the coevality frequency of multiple protostellar systems can help to better understand their formation mechanism. The coevali…
Young, Star-forming Galaxies and Their Local Counterparts: The Evolving Relationship of Mass-SFR-Metallicity Since z ∼ 2.1
Trump, Jonathan R.; Schneider, Donald P.; Gronwall, Caryl +5 more
We explore the evolution of the Stellar Mass-Star Formation Rate (SFR)-Metallicity relation using a set of 256 COSMOS and GOODS galaxies in the redshift range 1.90 < z < 2.35. We present the galaxies’ rest-frame optical emission-line fluxes derived from IR-grism spectroscopy with the Hubble Space Telescope and combine these data with SFRs an…
HDO and SO2 thermal mapping on Venus. III. Short-term and long-term variations between 2012 and 2016
Encrenaz, T.; Atreya, S. K.; Bézard, B. +6 more
We present the analysis of a four-year observational campaign using the TEXES high-resolution imaging spectrometer at the NASA Infrared Telescope Facility to map sulfur dioxide and deuterated water over the disk of Venus. Data have been recorded in two spectral ranges around 1345 cm-1 (7.4 µm) and 530 cm-1 (19 µm)…
Charged particle signatures of the diamagnetic cavity of comet 67P/Churyumov-Gerasimenko
Szego, K.; Goetz, C.; Henri, P. +9 more
One of the scientific objectives of the Rosetta mission is to investigate the diamagnetic cavity of comet 67P/Churyumov-Gerasimenko. We employed combined data of several instruments of the Rosetta Plasma Consortium to identify and study diamagnetic cavity crossing events. Using electron data from the Ion Electron Sensor to complement the Magnetome…
Properties of planetward ion flows in Venus' magnetotail
Futaana, Y.; Zhang, T. L.; Rong, Z. J. +3 more
Venus is gradually losing some of its atmosphere in the form of ions through its induced magnetotail. Some of these ions have been reported previously to flow back to the planet. Proposed drivers are magnetic reconnection and deflection of pickup ions in the magnetic field. We analyze protons and oxygen ions with eV to keV energies acquired by the…
Radial velocities of K-M dwarfs and local stellar kinematics
Sperauskas, J.; Bartašiūtė, S.; Deveikis, V. +3 more
Aims: The goal of this paper is to present complete radial-velocity data for the spectroscopically selected McCormick sample of nearby K-M dwarfs and, based on these and supplementary data, to determine the space-velocity distributions of late-type stars in the solar neighborhood.
Methods: We analyzed nearly 3300 measurements of radial v…
Angular Momentum Loss in the Envelope-Disk Transition Region of the HH 111 Protostellar System: Evidence for Magnetic Braking?
Lee, Chin-Fei; Li, Zhi-Yun; Hwang, Hsiang-Chih
HH 111 is a Class I protostellar system at a distance of ∼400 pc, with the central source VLA 1 associated with a rotating disk deeply embedded in a flattened envelope. Here we present the observations of this system at ∼0.″6 (240 au) resolution in C18O (J = 2 — 1) and a 230 GHz continuum obtained with the Atacama Large Millimeter/Submi…
Variation of Jupiter's aurora observed by Hisaki/EXCEED: 2. Estimations of auroral parameters and magnetospheric dynamics
Tsuchiya, Fuminori; André, Nicolas; Fujimoto, Masaki +7 more
Jupiter's auroral parameters are estimated from observations by a spectrometer EXCEED (Extreme Ultraviolet Spectroscope for Exospheric Dynamics) on board Japanese Aerospace Exploration Agency's Earth-orbiting planetary space telescope Hisaki. EXCEED provides continuous auroral spectra covering the wavelength range over 80-148 nm from the whole nor…
Proper Motion of the Leo II Dwarf Galaxy Based On Hubble Space Telescope Imaging
Piatek, Slawomir; Pryor, Carlton; Olszewski, Edward W.
This article reports a measurement of the proper motion of Leo II, a dwarf galaxy that is a likely satellite of the Milky Way, based on imaging with the Hubble Space Telescope and Wide Field Camera 3. The measurement uses compact background galaxies as standards of rest in both channels of the camera for two distinct pointings of the telescope, as…