Search Publications
Galaxy gas ejection in radio galaxies: the case of 3C 35
Birkinshaw, M.; Worrall, D. M.; Mannering, E.
We report results from XMM-Newton and Chandra observations of the nearby (z = 0.067) giant radio galaxy 3C 35. We find evidence for an X-ray-emitting gas belt, orthogonal to and lying between the lobes of 3C 35, which we interpret as fossil-group gas driven outwards by the expanding radio lobes. We also detect weak emission from a second, more ext…
Colour gradients of high-redshift early-type galaxies from hydrodynamical monolithic models
Matteucci, F.; Napolitano, N. R.; Tortora, C. +2 more
We analyse the evolution of colour gradients predicted by the hydrodynamical models of early-type galaxies (ETGs) in Pipino et al., which reproduce fairly well the chemical abundance pattern and the metallicity gradients of local ETGs. We convert the star formation (SF) and metal content into colours by means of stellar population synthetic model …
Variable dust formation by the colliding-wind Wolf-Rayet system HD 36402 in the Large Magellanic Cloud
Gruendl, R. A.; Chu, Y. -H.; Guerrero, M. A. +1 more
Infrared photometry of the probable triple WC4(+O?)+O8I: Wolf-Rayet system HD 36402 (= BAT99-38) in the Large Magellanic Cloud shows emission characteristic of heated dust. The dust emission is variable on a time-scale of years, with a period near 4.7 yr, possibly associated with orbital motion of the O8 supergiant and the inner P ≃ 3.03-d WC4+O b…
Constraining the luminosity function of faint undetected i-dropout galaxies
Koekemoer, A. M.; Stiavelli, M.; Morelli, L. +5 more
We present a new technique to quantify the light contribution coming from the faint high-redshift (z ∼ 6) galaxies below the detection threshold of imaging data, set conventionally at S/N = 4.5. We illustrate the technique with an application to Hubble Space Telescope Advanced Camera for Surveys images in the F775W and F850LP filters of the Ultra …
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…