Search Publications
The 12CO2 and 13CO2 Absorption Bands as Tracers of the Thermal History of Interstellar Icy Grain Mantles
Boogert, Adwin; He, Jiao; Emtiaz, SM +1 more
Analyses of infrared signatures of CO2 in water-dominated ices in the ISM can give information on the physical state of CO2 in icy grains and on the thermal history of the ices themselves. In many sources, CO2 was found in the “pure” crystalline form, as signatured by the splitting in the bending mode absorption pr…
Long-lived Protoplanetary Disks in Multiple Systems: The VLA View of HD 98800
Duchêne, Gaspard; Ribas, Álvaro; Espaillat, Catherine C. +1 more
The conditions and evolution of protoplanetary disks in multiple systems can be considerably different from those around single stars, which may have important consequences for planet formation. We present Very Large Array (VLA) 8.8 mm (34 GHz) and 5 cm (6 GHz) observations of the quadruple system HD 98800, which consists of two spectroscopic bina…
Memberships, Distances, and Proper Motions of the Open Clusters NGC 2112, NGC 2477, NGC 7789, and Collinder 261 from Gaia-DR2
Gao, Xin-hua
Membership determination of open clusters in high-noise environments is still an open question. This paper aims to evaluate the effectiveness of the Gaussian mixture model (GMM) in segregating likely cluster members of open clusters in high-noise environments. We use the GMM method to segregate likely cluster members of four low Galactic latitude …
Mesospheric CO2 ice clouds on Mars observed by Planetary Fourier Spectrometer onboard Mars Express
Aoki, S.; Kasaba, Y.; Giuranna, M. +4 more
We have investigated mesospheric CO2 ice clouds on Mars through analysis of near-infrared spectra acquired by Planetary Fourier Spectrometer (PFS) onboard the Mars Express (MEx) from MY 27 to MY 32. With the highest spectral resolution achieved thus far in the relevant spectral range among remote-sensing experiments orbiting Mars, PFS e…
Determination of Phobos' rotational parameters by an inertial frame bundle block adjustment
Willner, Konrad; Oberst, Jürgen; Burmeister, Steffi +1 more
A functional model for a bundle block adjustment in the inertial reference frame was developed, implemented and tested. This approach enables the determination of rotation parameters of planetary bodies on the basis of photogrammetric observations. Tests with a self-consistent synthetic data set showed that the implementation converges reliably to…
Detection of an Optical/UV Jet/Counterjet and Multiple Spectral Components in M84
Sparks, William B.; Georganopoulos, Markos; Chiaberge, Marco +3 more
We report an optical/UV jet and counterjet in M84, previously unreported in archival Hubble Space Telescope imaging. With archival VLA, ALMA, and Chandra imaging, we examine the first well-sampled spectral energy distribution of the inner jet of M84, where we find that multiple co-spatial spectral components are required. In particular, the ALMA d…
X-Ray Properties of AGN in Brightest Cluster Galaxies. I. A Systematic Study of the Chandra Archive in the 0.2 < z < 0.3 and 0.55 < z < 0.75 Redshift Range
Risaliti, Guido; Lusso, Elisabeta; Nardini, Emanuele +5 more
We present a search for nuclear X-ray emission in the brightest cluster galaxies (BCGs) of a sample of groups and clusters of galaxies extracted from the Chandra archive. The exquisite angular resolution of Chandra allows us to obtain robust photometry at the position of the BCG, and to firmly identify unresolved X-ray emission when present, thank…
Imaging radial velocity planets with SPHERE
Moutou, C.; Brandner, W.; Messina, S. +37 more
We present observations with the planet finder Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) of a selected sample of the most promising radial velocity (RV) companions for high-contrast imaging. Using a Monte Carlo simulation to explore all the possible inclinations of the orbit of wide RV companions, we identified the systems wit…
Update of membership and mean proper motion of open clusters from UCAC5 catalogue
Assafin, M.; Dias, W. S.; Monteiro, H.
We present mean proper motions and membership probabilities of individual stars for optically visible open clusters, which have been determined using data from the UCAC5 catalogue. This follows our previous studies with the UCAC2 and UCAC4 catalogues, but now using improved proper motions in the GAIA reference frame. In the present study results w…
Broadband X-Ray Spectral Analysis of the Double-nucleus Luminous Infrared Galaxy Mrk 463
Imanishi, Masatoshi; Tanimoto, Atsushi; Ueda, Yoshihiro +4 more
We present a broadband (0.4-70 keV) X-ray spectral analysis of the luminous infrared galaxy (LIRG) system Mrk 463 observed with Nuclear Spectroscopic Telescope Array (NuSTAR), Chandra, and XMM-Newton, which contains double active galactic nuclei (AGNs; Mrk 463E and Mrk 463W) with a separation of ∼3.8 kpc. Detecting their transmitted hard X-ray >…