Search Publications
An analysis of CoRoT multicolour photometry of exoplanets
Poretti, E.; Borsa, F.
We analysed the chromatic data of the planetary transits observed with CoRoT to supply homogeneous time series in each of the CoRoT colours. In a first step, we cleaned the chromatic light curves from the contamination of nearby stars and removed outliers and trends caused by anything different from the planetary transits. Then, we simultaneously …
A comprehensive study of NGC 2023 with XMM-Newton and Spitzer
Pérez-González, P. G.; Albacete-Colombo, J. F.; López-Santiago, J. +2 more
Nearby star-forming regions are ideal laboratories to study high-energy emission of different stellar populations, from very massive stars to brown dwarfs. NGC 2023 is a reflection nebula situated to the south of the Flame Nebula (NGC 2024) and at the edge of the H ii region IC 434, which also contains the Horsehead Nebula (Barnard 33). NGC 2023, …
Large size scatter of passively evolving lensed galaxies at z ~ 2 in CLASH.
Lin, L.; Chen, Y.; Kong, X. +3 more
In a systematic search over 11 cluster fields from Cluster Lensing And Supernova survey with Hubble (CLASH), we identify 10 passively evolving massive galaxies at redshift z ∼ 2. We derive the stellar properties of these galaxies using Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3)/Advanced Camera for Surveys (ACS) multiband data, togethe…
Properties of free-free, dust and CO emissions in the starbursts of blue compact dwarf galaxies
Hirashita, Hiroyuki
The central star-forming regions in three blue compact dwarf galaxies (He 2-10, NGC 5253 and II Zw 40) were observed in the 340 GHz (880µm) band at ∼5 arcsec resolution with the Submillimetre Array (SMA). Continuum emission associated with the central star-forming complex was detected in all these galaxies. The SMA 880 µm flux is decom…
On the coherence of WMAP and Planck temperature maps
Kovács, András; Carron, Julien; Szapudi, István
The recent data release of ESA's Planck mission together with earlier Wilkinson Microwave Anisotropy Probe (WMAP) releases provide the first opportunity to compare high-resolution full sky cosmic microwave background (CMB) temperature anisotropy maps. To quantify the coherence of these maps beyond the power spectrum, we introduce Generalized Phase…
Lyman break and ultraviolet-selected galaxies at z ∼ 1 - I. Stellar populations from the ALHAMBRA survey
Cepa, J.; Infante, L.; Molino, A. +31 more
We take advantage of the exceptional photometric coverage provided by the combination of GALEX data in the ultraviolet (UV) and the ALHAMBRA survey in the optical and near-infrared to analyse the physical properties of a sample of 1225 GALEX-selected Lyman break galaxies (LBGs) at 0.8 ≲ z ≲ 1.2 that are located in the COSMOS field. This is the lar…
The X-ray spectrum of the black hole candidate Swift J1753.5-0127
Mostafa, Reham; Mendez, Mariano; Hiemstra, Beike +4 more
We present a spectral analysis of the black hole candidate and X-ray transient source Swift J1753.5-0127 making use of simultaneous observations of XMM-Newton and Rossi X-ray Timing Explorer in 2006, when the source was in outburst. The aim of this paper is to test whether a thermal component due to the accretion disc is present in the X-ray spect…
High-angular-resolution stellar imaging with occultations from the Cassini spacecraft - I. Observational technique
Nicholson, Philip D.; Hedman, Matthew M.; Lloyd, James P. +2 more
We present novel observations utilizing the Cassini spacecraft to conduct an observing campaign for stellar astronomy from a vantage point in the outer Solar system. By exploiting occultation events in which Mira passed behind the Saturnian ring plane as viewed by Cassini, parametric imaging data were recovered spanning the near-infrared. From thi…
New VLT observations of the Fermi pulsar PSR J1048-5832
de Luca, A.; Marelli, M.; Razzano, M. +1 more
PSR J1048-5832 is a Vela-like (P = 123.6 ms; τ ∼ 20.3 kyr) γ-ray pulsar detected by Fermi, at a distance of ∼2.7 kpc and with a rotational energy loss rate dot{E}_SD ∼ 2 × 10^{36} erg s-1. The PSR J1048-5832 field has been observed with the Very Large Telescope (VLT) in the V and R bands. We used these data to determine the colour of th…
A young hierarchical triple system harbouring a candidate debris disc
Henning, Th.; Olofsson, J.; Schlieder, J. E. +2 more
We report the detection of a wide young hierarchical triple system where the primary has a candidate debris disc. The primary, TYC 5241-986-1 A, is a known Tycho star which we classify as a late-K star with emission in the X-ray, near- and far-ultraviolet (UV) and Hα suggestive of youth. Its proper motion, photometric distance (65-105 pc) and radi…