Search Publications
K band SINFONI spectra of two z ~ 5 submillimeter galaxy systems: upper limits to the unobscured star formation from [O II] optical emission line searches
Arribas, Santiago; Colina, Luis; Storchi-Bergmann, Thaisa +2 more
We present deep SINFONI K-band integral field spectra of two submillimeter galaxy systems (SMG): BR 1202-0725 and J1000+0234, at z = 4.69 and 4.55, respectively. Spectra extracted for each object in the two systems do not show any signature of the [O II]λλ3726, 29 Å emission-lines, placing upper flux limits of 3.9 and 2.5 × 10-18erg s
Analysis of luminosity distributions and the shape parameters of strong gravitational lensing elliptical galaxies
Magain, P.; Sluse, D.; Chantry, V. +1 more
Context. The luminosity profiles of galaxies acting as strong gravitational lenses can be tricky to study. Indeed, strong gravitational lensing images display several lensed components, both point-like and diffuse, around the lensing galaxy. Those objects limit the study of the galaxy luminosity to its inner parts. Therefore, the usual fitting met…
The puzzling properties of the magnetic O star Tr16-22
Neiner, Coralie; Morrell, Nidia; Nazé, Yaël +4 more
Context. The detection of bright, hard, and variable X-ray emission in Tr16-22 prompted spectropolarimetric observations of this star, which in turn led to the discovery of a surface magnetic field.
Aims: We want to further constrain the properties of this star, in particular to verify whether X-ray variations are correlated to changes in opt…
Constraints on the dark energy dipole from large-scale structures
Hurier, G.
The high-significance measurement of large-scale structure signals enables testing the isotropy of the Universe. The measurement of cosmological parameters through the large-scale distribution of matter is now a mature domain. This approach is mainly limited by our knowledge of astrophysical processes that are used to observe the large-scale struc…
Hubble imaging of V1331 Cygni: proper motion study of its circumstellar structures
Stecklum, B.; Linz, Hendrik; Choudhary, A.
Aims: The young star V1331 Cyg received previous attention because it is surrounded by an optical, arc-like reflection nebula. V1331 Cyg is commonly considered to be a candidate for an object that has undergone an FU-Ori (FUOR) outbreak in the past. This in turn could lead to a time-varying appearance of the dusty arcs that may be revealed by…
Coronal O VI emission observed with UVCS/SOHO during solar flares: Comparison with soft X-ray observations
Raymond, J. C.; Giordano, S.; Mancuso, S.
In this work, we derive the O VI 1032 Å luminosity profiles of 58 flares, during their impulsive phase, based on off-limb measurements by the Ultraviolet Coronagraph Spectrometer (UVCS) aboard the SOlar and Heliospheric Observatory (SOHO). The O VI luminosities from the transition region plasma (here defined as the region with temperatures 5.0 ≤ l…
Fast inversion of Zeeman line profiles using central moments. II. Stokes V moments and determination of vector magnetic fields
Bommier, V.; Mein, P.; Mein, N. +2 more
Context. In the case of unresolved solar structures or stray light contamination, inversion techniques using four Stokes parameters of Zeeman profiles cannot disentangle the combined contributions of magnetic and nonmagnetic areas to the observed Stokes I.
Aims: In the framework of a two-component model atmosphere with filling factor f, we pr…
Investigation of cosmic ray penetration with wavelet cross-correlation analysis
Yang, Rui-zhi
Aims: We use Fermi-LATand Planck data to calculate the cross correlation between γ-ray signal and gas distribution in different scales in giant molecular clouds (GMCs). Then we investigate the cosmic rays (CRs) penetration in GMCs with these informations.
Methods: We use the wavelet technique to decompose both the γ-ray and dust opacity …
Total infrared luminosity estimation from local galaxies in AKARI all sky survey (Corrigendum)
Takeuchi, T. T.; Pollo, A.; Solarz, A.
Baryon acoustic oscillations in the Lyα forest of BOSS DR11 quasars
Pâris, Isabelle; Petitjean, Patrick; Aubourg, Éric +35 more
We report a detection of the baryon acousticoscillation (BAO) feature in the flux-correlation function of the Lyα forest of high-redshift quasars with a statistical significance of five standard deviations. The study uses 137 562 quasars in the redshift range 2.1 ≤ z ≤ 3.5 from the data release 11 (DR11) of the Baryon Oscillation Spectroscopic Sur…