Search Publications
A modified CoRoT detrend algorithm and the discovery of a new planetary companion
Andrade, Laerte; Emilio, Marcelo; Janot-Pacheco, Eduardo +4 more
We present MCDA, a modification of the COnvection ROtation and planetary Transits (CoRoT) detrend algorithm (CDA) suitable to detrend chromatic light curves. By means of robust statistics and better handling of short-term variability, the implementation decreases the systematic light-curve variations and improves the detection of exoplanets when c…
On the age of the Nele asteroid family
Vokrouhlický, D.; Nesvorný, D.; Carruba, V. +1 more
The Nele group, formerly known as the Iannini family, is one of the youngest asteroid families in the main belt. Previously, it has been noted that the pericentre longitudes ϖ and nodal longitudes Ω of its largest member asteroids are clustered at the present time, therefore suggesting that the collisional break-up of parent body must have happene…
Identification and analysis of the young population in the starburst galaxy NGC 253
Baume, G.; Rodríguez, M. J.; Feinstein, C.
We present a study of the young population in the starburst galaxy NGC 253. In particular, we focused our attention on searching for young star groups, obtaining their main properties and studying their hierarchical organization. For this task, we used multiband images and their corresponding photometric data obtained with the Advanced Camera for …
Determination of astrophysical parameters of quasars within the Gaia mission
Delchambre, L.
We describe methods designed to determine the astrophysical parameters of quasars based on spectra coming from the red and blue spectrophotometers of the Gaia satellite. These methods principally rely on two already published algorithms that are the weighted principal component analysis and the weighted phase correlation. The presented approach be…
Understanding Fomalhaut as a Cooper pair
Jones, H. R. A.; Feng, F.
Fomalhaut is a nearby stellar system and has been found to be a triple based on astrometric observations. With new radial velocity and astrometric data, we study the association between Fomalhaut A, B, and C in a Bayesian framework, finding that the system is gravitationally bound or at least associated. Based on simulations of the system, we find…
The very faint hard state of the persistent neutron star X-ray binary SLX 1737-282 near the Galactic Centre
Haberl, F.; Ponti, G.; De Marco, B. +2 more
We report on a detailed study of the spectral and temporal properties of the neutron star low-mass X-ray binary SLX 1737-282, which is located only ∼1° away from Sgr A*. The system is expected to have a short orbital period, even within the ultracompact regime, given its persistent nature at low X-ray luminosities and the long duration thermonucle…
Infrared colours and inferred masses of metal-poor giant stars in the Kepler field
Schlaufman, Kevin C.; Kennedy, G. M.; Casey, A. R. +1 more
Intrinsically luminous giant stars in the Milky Way are the only potential volume-complete tracers of the distant disc, bulge, and halo. The chemical abundances of metal-poor giants also reflect the compositions of the earliest star-forming regions, providing the initial conditions for the chemical evolution of the Galaxy. However, the intrinsic r…
The Star Formation Reference Survey - II. Activity demographics and host-galaxy properties for infrared-selected galaxies
Zezas, A.; Ashby, M. L. N.; Willner, S. P. +1 more
We present activity demographics and host-galaxy properties of infrared-selected galaxies in the local Universe, using the representative Star Formation Reference Survey (SFRS). Our classification scheme is based on a combination of optical emission-line diagrams (BPT) and infrared (IR)-colour diagnostics. Using the weights assigned to the SFRS ga…
Discovery of two eclipsing X-ray binaries in M 51
Soria, Roberto; Liu, Jifeng; Urquhart, Ryan +1 more
We discovered eclipses and dips in two luminous (and highly variable) X-ray sources in M 51. One (CXOM51 J132943.3+471135) is an ultraluminous supersoft source, with a thermal spectrum at a temperature of about 0.1 keV and characteristic blackbody radius of about 104 km. The other (CXOM51 J132946.1+471042) has a two-component spectrum w…
Investigating the Lyman photon escape in local starburst galaxies with the Cosmic Origins Spectrograph
Buat, Véronique; Burgarella, Denis; Hernandez, Svea +4 more
We present a study of seven star-forming galaxies from the Cosmic Evolution Survey observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope (HST). The galaxies are located at relatively low redshifts, z ∼ 0.3, with morphologies ranging from extended and disturbed to compact and smooth. To complement the HST observatio…