Search Publications
Spectral Energy Distributions of starburst galaxies in the 900-1200 Å range
Buat, V.; Burgarella, D.; Kunth, D. +1 more
We present the 970-1175 Å spectral energy distributions (SEDs) of 12 starburst galaxies observed with the Far Ultraviolet Spectroscopic Explorer FUSE. We benefit from the high spectral resolution of FUSE to estimate a continuum as much as possible unaffected by the interstellar lines. The continuum is rather flat with, in a few cases, a decrease a…
Classical novae in outburst: The early evolution of the ultraviolet continuum
Altamore, A.; González-Riestra, R.; Cassatella, A.
In the framework of a phenomenological study of the ultraviolet properties of classical novae in outburst, we have selected 12 objects among the best monitored at low resolution with the IUE satellite, and studied the temporal evolution of the ultraviolet continuum and of the O I 1300 Å line flux during the early post-outburst phase. We confirm th…
Transition region explosive events: Do they have a coronal counterpart?
Doyle, J. G.; Madjarska, M. S.; Teriaca, L.
EUV explosive events are a prominent class of phenomena characterizing the solar transition region. Their correct location in the wider frame-work of the outer solar atmosphere can provide important insight on the nature of the transition region itself and its relationship with the hotter corona and the cooler chromosphere. In this paper we presen…
An evaluation of the correlation between open solar flux and total solar irradiance
Lockwood, M.
The correlation between the coronal source flux FS and the total solar irradiance ITS is re-evaluated in the light of an additional 5 years' data from the rising phase of solar cycle 23 and also by using cosmic ray fluxes detected at Earth. Tests on monthly averages show that the correlation with FS deduced from th…
Discovery of a new quadruply lensed QSO: HS 0810+2554 - A brighter twin to PG 1115+080
Reimers, D.; Hagen, H. -J.; Baade, R. +2 more
We announce the probable discovery of a new very bright gravitationally lensed QSO,
Linear polarization of the O VI lambda 1031.92 coronal line. II. Constraints on the magnetic field and the solar wind velocity field vectors in the coronal polar holes
Raouafi, N. -E.; Lemaire, P.; Sahal-Bréchot, S.
Numerical computation results of the linear polarization parameters of the O VI lambda1031 .92 coronal line are presented. They are based on theoretical results obtained by Raouafi (2002 and 2000), which give the Stokes parameters of a resonance scattering spectral line sensitive simultaneously to the Hanle effect and to the Doppler redistribution…
ISOCAM mid-infrared detection of HR 10: A distant clone of Arp 220 at z = 1.44
Aussel, H.; Elbaz, D.; Duc, P. -A. +5 more
We report the detection of the extremely red object (ERO), HR 10 (I-K ~ 6.5, z=1.44), at 4.9 and 6.1 mu m (rest-frame) with ISOCAM, the mid-infrared (MIR) camera onboard the Infrared Space Observatory (ISO). HR 10 is the first ERO spectroscopically identified to be associated with an ultra-luminous IR galaxy (ULIG) detected in the radio, MIR and s…
Discovery of calcite in the solar type protostar NGC 1333-IRAS 4
Waters, L. B. F. M.; Ceccarelli, C.; Caux, E. +3 more
We present observations, obtained with ISO-LWS, of the continuum between 50-200 mu m of the solar type protostar IRAS 4, in the NGC 1333 complex. The continuum presents an excess, around 95 mu m, that we demonstrate must be a dust feature. We compared the 95 mu m excess with the calcite feature at 92 mu m and find that it fits the observations rea…
Analysis of a delta spot
Liu, Y.; Zhang, H. Q.
delta -groups generally develop in three different ways: eruption of a single complex active region, eruption of large satellite spots near a large older spot, or collision of spots of opposite polarity from different dipoles. In this paper, we present a rare observational result in which a delta -spot forms from rapid coalescence of two opposite …
A VLT/FORS2 spectroscopic survey in the HDF-S
Fontana, A.; Vanzella, E.; Grazian, A. +6 more
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) =~ 20 to I(AB) =~ 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects belong to the HDF-S proper, i.e. the WFPC2 deep area. 15 high-redshift galaxies with 2.0 < z < 3.5 (10 in the HDF-S proper) have been identified. …