Search Publications
Atmospheric stellar parameters for large surveys using FASMA, a new spectral synthesis package
Sousa, S. G.; Santos, N. C.; Bruzual, G. +4 more
In the era of vast spectroscopic surveys focusing on Galactic stellar populations, astronomers want to exploit the large quantity and good quality of data to derive their atmospheric parameters without losing precision from automatic procedures. In this work, we developed a new spectral package, FASMA, to estimate the stellar atmospheric parameter…
Signature of inverse Compton emission from blazars
Gaur, Haritma; Mohan, Prashanth; Wierzcholska, Alicja +1 more
Blazars are classified into high-, intermediate- and low-energy-peaked sources based on the location of their synchrotron peak. This lies in infra-red/optical to ultra-violet bands for low- and intermediate-peaked blazars. The transition from synchrotron to inverse Compton emission falls in the X-ray bands for such sources. We present the spectral…
Kinetic Tomography. II. A Second Method for Mapping the Velocity Field of the Milky Way Interstellar Medium and a Comparison with Spiral Structure Models
Peek, J. E. G.; Tchernyshyov, Kirill; Zasowski, Gail
In this work, we derive a spatially resolved map of the line-of-sight velocity of the interstellar medium and use it, along with a second map of line-of-sight velocity from Paper I of this series, to determine the nature of the gaseous spiral structure in the Milky Way (MW). This map is derived from measurements of the 1.527 µm diffuse inter…
A General Method for Assessing the Origin of Interstellar Small Bodies: The Case of 1I/2017 U1 (‘Oumuamua)
Zuluaga, Jorge I.; Sánchez-Hernández, Oscar; Sucerquia, Mario +1 more
With the advent of more and deeper sky surveys, the discovery of interstellar small objects entering into the solar system has been finally possible. In 2017 October 19, using observations of the Pan-STARRS survey, a fast moving object, now officially named 1I/2017 U1 (‘Oumuamua), was discovered in a heliocentric unbound trajectory, suggesting an …
Multiplicity of disc-bearing stars in Upper Scorpius and Upper Centaurus-Lupus
Federrath, Christoph; Bento, Joao; Ireland, Michael +2 more
We present observations of disc-bearing stars in Upper Scorpius (US) and Upper Centaurus-Lupus (UCL) with moderate resolution spectroscopy in order to determine the influence of multiplicity on disc persistence after ∼ 5-20 Myr. Discs were identified using infrared (IR) excess from the Wide-field Infrared Survey Explorer (WISE) survey. Our survey …
ALMA observations of RCW 120 Fragmentation at 0.01 pc scale&star
Zavagno, A.; Louvet, F.; Bronfman, L. +4 more
Context. Little is known about how high-mass stars form. Around 30% of the young high-mass stars in the Galaxy are observed at the edges of ionized (H II) regions. Therefore these are places of choice to study the earliest stages of high-mass star formation, especially toward the most massive condensations. High spatial resolution observations in …
SCExAO/CHARIS Near-IR High-contrast Imaging and Integral Field Spectroscopy of the HIP 79977 Debris Disk
Currie, Thayne; Kwon, Jungmi; Tamura, Motohide +13 more
We present new, near-infrared (1.1-2.4 µm) high-contrast imaging of the bright debris disk surrounding HIP 79977 with the Subaru Coronagraphic Extreme Adaptive Optics system (SCExAO) coupled with the CHARIS integral field spectrograph. SCExAO/CHARIS resolves the disk down to smaller angular separations of (0.″11 r ∼ 14 au) and at a higher si…
Science data visualization in planetary and heliospheric contexts with 3DView
André, N.; Budnik, E.; Pitout, F. +21 more
We present a 3D orbit viewer application capable of displaying science data. 3DView, a web tool designed by the French Plasma Physics Data Center (CDPP) for the planetology and heliophysics community, has extended functionalities to render space physics data (observations and models alike) in their original 3D context. Time series, vectors, dynami…
The DREAMS Experiment Onboard the Schiaparelli Module of the ExoMars 2016 Mission: Design, Performances and Expected Results
Schmidt, W.; Patel, M. R.; Bellucci, G. +65 more
The first of the two missions foreseen in the ExoMars program was successfully launched on 14th March 2016. It included the Trace Gas Orbiter and the Schiaparelli Entry descent and landing Demonstrator Module. Schiaparelli hosted the DREAMS instrument suite that was the only scientific payload designed to operate after the touchdown. DREAMS is a m…
The Carnegie RR Lyrae Program: mid-infrared period-luminosity relations of RR Lyrae stars in Reticulum
Madore, Barry F.; Freedman, Wendy L.; Scowcroft, Victoria +4 more
We analysed 30 RR Lyrae stars (RRLs) located in the Large Magellanic Cloud (LMC) globular cluster Reticulum that were observed in the 3.6 and 4.5 µ m passbands with the Infrared Array Camera (IRAC) on board the Spitzer Space Telescope. We derived new mid-infrared (MIR) period-luminosity (PL) relations. The zero points of the PL relations wer…