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The CO2 absorption spectrum in the 2.3 µm transparency window by high sensitivity CRDS: (II) Self-absorption continuum
Campargue, A.; Vasilchenko, S.; Mondelain, D. +2 more
The CO2 absorption continuum near 2.3 µm is determined for a series of sub atmospheric pressures (250-750 Torr) by high sensitivity Cavity Ring Down Spectroscopy. An experimental procedure consisting in injecting successively a gas flow of CO2 and synthetic air, keeping constant the gas pressure in the CRDS cell, has be…
A Multi-band Study of the Remarkable Jet in Quasar 4C+19.44
Cheung, C. C.; Uchiyama, Y.; Siemiginowska, A. +14 more
We present arcsecond-resolution data in the radio, IR, optical, and X-ray for 4C+19.44 (=PKS 1354+195), the longest and straightest quasar jet with deep X-ray observations. We report results from radio images with half to one arcsecond angular resolution at three frequencies, plus Hubble Space Telescope and Spitzer data. The Chandra data allow us …
The 2013 February 17 Sunquake in the Context of the Active Region's Magnetic Field Configuration
Guglielmino, S. L.; Green, L. M.; Valori, G. +3 more
Sunquakes are created by the hydrodynamic response of the lower atmosphere to a sudden deposition of energy and momentum. In this study, we investigate a sunquake that occurred in NOAA active region 11675 on 2013 February 17. Observations of the corona, chromosphere, and photosphere are brought together for the first time with a nonlinear force-fr…
Comparison of CME and ICME Structures Derived from Remote-Sensing and In Situ Observations
Bothmer, V.; Mrotzek, N.
We present results from the comparison of the near-Sun and in situ analysis of two Earth-directed coronal mass ejections (CMEs) with different 3D orientations and solar source region characteristics. The CME on 14 July 2000, the so-called Bastille Day storm, a well-studied event, was observed from a single-point perspective by the Large Angle and …
KDG218, a nearby ultra-diffuse galaxy
Sharina, M. E.; Karachentsev, I. D.; Makarova, L. N. +1 more
We present properties of the low-surface-brightness galaxy KDG218 observed with the HST/ACS. The galaxy has a half-light (effective) diameter of ae = 47″ and a central surface brightness of SBV(0) = 24.m4/□″. The galaxy remains unresolved with the HST/ACS, which implies its distance of D > 13.1 Mpc and linear ef…
Infrared dust bubble CS51 and its interaction with the surrounding interstellar medium
Tej, Anandmayee; Liu, Hong-Li; Liu, Tie +4 more
A multiwavelength investigation of the southern infrared dust bubble CS51 is presented in this paper. We probe the associated ionized, cold dust, molecular and stellar components. Radio continuum emission mapped at 610 and 1300 MHz, using the Giant Metrewave Radio Telescope, India, reveals the presence of three compact emission components (A, B, a…
Climbing the cosmic ladder with stellar twins in RAVE with Gaia
Gilmore, G.; Munari, U.; Steinmetz, M. +17 more
We apply the twin method to determine parallaxes to 232 545 stars of the RAVE survey using the parallaxes of Gaia DR1 as a reference. To search for twins in this large data set, we apply the t-student stochastic neighbour embedding projection that distributes the data according to their spectral morphology on a two-dimensional map. From this map, …
XMM-Newton and INTEGRAL view of the hard state of EXO 1745-248 during its 2015 outburst
Stella, L.; de Martino, D.; Rea, N. +10 more
Context. Transient low-mass X-ray binaries (LMXBs) often show outbursts that typically last a few weeks and are characterized by a high X-ray luminosity (Lx ≈ 1036-1038 erg s-1), while most of the time they are found in X-ray quiescence (LX ≈ 1031-1033 erg s-1)…
The PMA Catalogue: 420 million positions and absolute proper motions
Akhmetov, V. S.; Fedorov, P. N.; Velichko, A. B. +1 more
We present a catalogue that contains about 420 million absolute proper motions of stars. It was derived from the combination of positions from Gaia DR1 and 2MASS, with a mean difference of epochs of about 15 yr. Most of the systematic zonal errors inherent in the 2MASS Catalogue were eliminated before deriving the absolute proper motions. The abso…
No Evidence for Feedback: Unexceptional Low-ionization Winds in Host Galaxies of Low Luminosity Active Galactic Nuclei at Redshift z ∼ 1
Prochaska, J. Xavier; Faber, S. M.; Coil, Alison L. +6 more
We study winds in 12 X-ray AGN host galaxies at z∼ 1. We find, using the low-ionization Fe II λ2586 absorption in the stacked spectra, that the probability distribution function (PDF) of the centroid-velocity shift in AGNs has 50th (median), 16th, and 84th percentiles of (-87, -251, +86) km s-1 respectively. The PDF of the velocity disp…