Search Publications
NGC 7469 as seen by MEGARA: new results from high-resolution IFU spectroscopy
Márquez, I.; Masegosa, J.; Cazzoli, S. +13 more
We present our analysis of high-resolution (R ∼ 20 000) GTC/MEGARA integral-field unit spectroscopic observations, obtained during the commissioning run, in the inner region (12.5 arcsec × 11.3 arcsec) of the active galaxy NGC 7469, at spatial scales of 0.62 arcsec. We explore the kinematics, dynamics, ionization mechanisms, and oxygen abundances …
Probing Interstellar Grain Growth through Polarimetry in the Taurus Cloud Complex
Hoang, Thiem; Andersson, B. -G.; Vaillancourt, John E. +4 more
The optical and near-infrared (OIR) polarization of starlight is typically understood to arise from the dichroic extinction of that light by dust grains whose axes are aligned with respect to a local magnetic field. The size distribution of the aligned-grain population can be constrained by measurements of the wavelength dependence of the polariza…
Deciphering the Large-scale Environment of Radio Galaxies in the Local Universe. II. A Statistical Analysis of Environmental Properties
Capetti, A.; Tramacere, A.; Campana, R. +6 more
In our previous analysis we investigated the large-scale environment of two samples of radio galaxies (RGs) in the local universe (I.e., with redshifts zsrc ≤ 0.15), classified as FR I and FR II on the basis of their radio morphology. The analysis was carried out using (I) extremely homogeneous catalogs and (II) a new method, known as c…
Deciphering the radio star formation correlation on kpc scales. I. Adaptive kernel smoothing experiments
Soida, M.; Beck, R.; Vollmer, B. +1 more
One of the tightest correlations in astronomy is the relation between the integrated radio continuum and the far-infrared (FIR) emission. Within nearby galaxies, variations in the radio-FIR correlation have been observed, mainly because the cosmic ray electrons migrate before they lose their energy via synchrotron emission or escape. The major cos…
Estimated Minimum Life Span of the Jezero Fluvial Delta (Mars)
Mangold, Nicolas; Salese, Francesco; Kleinhans, Maarten G. +4 more
The paleo-lake floor at the edge of the Jezero delta has been selected as the NASA 2020 rover landing site. In this article, we demonstrate the sequences of lake filling and delta formation and constrain the minimum life span of the Jezero paleo-lake from sedimentological and hydrological analyses. Two main phases of delta evolution can be recogni…
The VMC Survey. XXXVII. Pulsation periods of dust-enshrouded AGB stars in the Magellanic Clouds
van Loon, J. Th.; Ripepi, V.; Marconi, M. +9 more
Context. Variability is a key property of stars on the asymptotic giant branch (AGB). Their pulsation period is related to the luminosity and mass-loss rate of the star. Long-period variables (LPVs) and Mira variables are the most prominent of all types of variability of evolved stars. The reddest, most obscured AGB stars are too faint in the opti…
Trajectory Determination for Coronal Ejecta Observed by WISPR/Parker Solar Probe
Qiu, J.; Howard, R. A.; Vourlidas, A. +3 more
The Wide-field Imager for Solar Probe (WISPR) onboard the Parker Solar Probe (PSP), observing in white light, has a fixed angular field of view, extending from 13.5∘ to 108∘ from the Sun and approximately 50∘ in the transverse direction. Because of the highly elliptical orbit of PSP, the physical extent of the imag…
The Late-time Afterglow Evolution of Long Gamma-Ray Bursts GRB 160625B and GRB 160509A
Fruchter, Andrew S.; Cenko, S. Bradley; Tanvir, Nial +12 more
We present post-jet-break Hubble Space Telescope, Very Large Array, and Chandra observations of the afterglow of the long γ-ray bursts GRB 160625B (between 69 and 209 days) and GRB 160509A (between 35 and 80 days). We calculate the post-jet-break decline rates of the light curves and find the afterglow of GRB 160625B is inconsistent with a simple …
The peculiar kinematics of the multiple populations in the globular cluster Messier 80 (NGC 6093)
Dalessandro, E.; Dreizler, S.; Bastian, N. +10 more
We combine MUSE spectroscopy and Hubble Space Telescope ultraviolet (UV) photometry to perform a study of the chemistry and dynamics of the Galactic globular cluster Messier 80 (M80, NGC 6093). Previous studies have revealed three stellar populations that vary not only in their light-element abundances, but also in their radial distributions, with…
A long-period (P = 61.8 d) M5V dwarf eclipsing a Sun-like star from TESS and NGTS
Jackman, James A. G.; Wheatley, Peter J.; Bayliss, Daniel +27 more
The Transiting Exoplanet Survey Satellite has produced a large number of single-transit event candidates which are being monitored by the Next Generation Transit Survey (NGTS). We observed a second epoch for the TIC-231005575 system (Tmag = 12.06 and $T_{\rm eff} = 5500 \pm 85\, \mathrm{ K}$ ) with NGTS and a third epoch with Las Cumbre…