Search Publications
Heterogeneous evolution of the Galaxy and the origin of the short-lived nuclides in the early solar system
Kaur, Tejpreet; Sahijpal, Sandeep
We present Galactic chemical evolution (GCE) models of the short-lived radionuclides (SLRs), 26Al, 36Cl, 41Ca, 53Mn, and 60Fe, across the entire Milky Way galaxy. The objective is to understand the spatial and temporal distribution of the SLRs in the galaxy. The gamma-ray observations infer wi…
Search for multiwavelength emission from the binary millisecond pulsar PSR J1836-2354A in the globular cluster M22
de Martino, D.; Di Salvo, T.; Iaria, R. +5 more
We present a multiband search for X-ray, optical, and γ-ray emission of the radio binary millisecond pulsar J1836-2354A, hosted in the globular cluster M22. X-ray emission is significantly detected in two Chandra observations, performed in 2005 and 2014, at a luminosity of ∼2-3 × 1030 erg s-1, in the 0.5-8 keV energy range. T…
Monitoring of the D doublet of neutral sodium during transits of two `evaporating' planets
Hirano, T.; Ansdell, M.; Gaidos, E.
Spectroscopic transit detection of constituents in winds from `evaporating' planets on close-in transiting orbits could provide desperately needed information on the composition, formation, and orbital evolution of such objects. We obtained high-resolution optical spectra of the host stars during a single transit of Kepler-1520b and two transits o…
Depth of the dynamo region and zonal circulation of the molecular layer in Saturn inferred from its equatorially symmetric gravitational field
Schubert, Gerald; Kong, Dali; Zhang, Keke
The high-precision equatorially symmetric gravitational field of Saturn (the even gravitational coefficients J2, J4, …, J12) measured by the Cassini Grand Finale reflects its internal structure, its non-spherical shape caused by rotation and its strong zonal circulation whose location is controlled by the depth of …
VALES V: a kinematic analysis of the molecular gas content in H-ATLAS galaxies at z ∼ 0.03-0.35 using ALMA
Leiton, R.; Bauer, F. E.; Farrah, D. +19 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) resolved observations of molecular gas in galaxies up to z = 0.35 to characterize the role of global galactic dynamics on the global interstellar medium properties. These observations consist of a sub-sample of 39 galaxies taken from the Valparaíso ALMA Line Emission Survey (VALES). Fr…
Quantifying the AGN-driven outflows in ULIRGs (QUADROS) IV: HST/STIS spectroscopy of the sub-kpc warm outflow in F14394+5332
Batcheldor, D.; Ramos Almeida, C.; Tadhunter, C. +1 more
Considerable uncertainties remain about the nature of warm, AGN-driven outflows and their impact on the evolution of galaxies. This is because the outflows are often unresolved in ground-based observations. As part of a project to study the AGN outflows in some of the most rapidly evolving galaxies in the local Universe, here we present Hubble Spa…
A transiting super-Earth close to the inner edge of the habitable zone of an M0 dwarf star
Bonavera, L.; Rebolo, R.; González Hernández, J. I. +9 more
We present a super-Earth orbiting close to the inner edge of the habitable zone of the cool dwarf star K2-286 (EPIC 249889081), detected with data from the K2 mission in its 15th campaign. The planet has radius of 2.1 ± 0.2 R⊕, near the 1.5-2.0 R⊕ gap in the radii distribution. The equilibrium temperature is 347^{+21}_{-11} K…
A fractal analysis application of the pre-whitening technique to δ Scuti stars time series
Garrido, R.; Suárez, J. C.; de Franciscis, S. +4 more
Fractal fingerprints have been found recently in the light curves of several δ Scuti stars observed by Convection Rotation and planetary Transits(CoRoT) satellite. This sole fact might pose a problem for the detection of pulsation frequencies using classical pre-whitening techniques, but it is also a potentially rich source for information about p…
Young stars raining through the galactic halo: the nature and orbit of price-whelan 1
Martin, Nicolas; Malhan, Khyati; Ibata, Rodrigo A. +3 more
We present radial velocities for five member stars of the recently discovered young (age ≃ 100-150 Myr) stellar system Price-Whelan 1 (PW 1), which is located far away in the Galactic Halo (D≃ 29 kpc, Z≃ 15 kpc), and that is probably associated with the leading arm (LA) of the Magellanic Stream. We measure the systemic radial velocity of PW 1, V
A morphological study of galaxies in ZwCl0024+1652, a galaxy cluster at redshift z ∼ 0.4
Sánchez-Portal, Miguel; Pintos-Castro, Irene; Bongiovanni, Ángel +9 more
The well-known cluster of galaxies ZwCl0024+1652 at z ∼ 0.4 lacks an in-depth morphological classification of its central region. While previous studies provide a visual classification of a patched area, we used the public code called galaxy Support Vector Machine (GALSVM) and HST/ACS data as well as the WFP2 master catalogue to automatically clas…