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Stellar population and dust extinction in an ultraluminous infrared galaxy at z = 1.135

Kawara, K.; Oyabu, S.; Yoshii, Y. +6 more

We present the detailed optical to far-infrared (far-IR) observations of SST J1604+4304, an ultraluminous IR galaxy at z = 1.135. Analysing the stellar absorption lines, namely, the CaII H & K and Balmer H lines in the optical spectrum, we derive the upper limits of an age for the stellar population. Given this constraint, the minimum χ^2<…

Could the GRB-supernovae GRB031203 and XRF060218 be cosmic twins?

Feng, Lu; Fox, Derek B.

The gamma-ray burst (GRB)/X-ray flash (XRF) events GRB031203, discovered by INTEGRAL, and XRF060218, discovered by Swift, represent two of the only five GRB-supernovae (GRB-SNe) with optical spectroscopic confirmation of their SN components. Yet, their observed high-energy properties offer a sharp contrast: while GRB031203 was detected as a short …

Subarcsecond radio continuum mapping in and around the spiral galaxy NGC3351 using MERLIN

Terlevich, Roberto; Terlevich, Elena; Richards, Anita M. S. +6 more

We report subarcsecond-scale radio continuum observations of a field of 35 × 22 arcmin² centred in NGC3351 obtained with the Multi-Element Radio Linked Interferometer Network (MERLIN). We found 23 radio sources in this field, six of which are projected within the D₂₅ isophote of the galaxy and three are located inside the cen…

Blasts and shocks in the disc of NGC 4258

Battaner, E.; Mediavilla, E.; Castillo-Morales, A. +1 more

We present integral field spectroscopic observations of the central region of the active galaxy NGC 4258 obtained with the fibre IFU system INTEGRAL. We have been able to detect cold neutral gas by means of the interstellar NaD doublet absorption and to trace its distribution and kinematics with respect to the underlying disc. The neutral gas is b…

The dense and asymmetric central star wind of the young PN He 2-138

Prinja, R. K.; Urbaneja, M. A.; Massa, D. L. +1 more

We present optical European Southern Observatory time series and UV archival (Far Ultraviolet Spectroscopic Explorer (FUSE), Hubble Space Telescope, International Ultraviolet Explorer) spectroscopy of the H-rich central star of He 2-138. Our study targets the central star wind in a very young planetary nebula, and explores physical conditions that…

Frequency-resolved spectroscopy of XB1323-619 using XMM-Newton data: detection of a reflection region in the disc

Balman, Ş.

We present the frequency-resolved energy spectra (FRS) of the low-mass X-ray binary dipper XB1323-619 during persistent emission in four different frequency bands using an archival XMM-Newton observation. FRS method helps to probe the inner zones of an accretion disc. XB1323-619 is an Atoll source and a type-I burster. We find that the FRS is well…

Soft X-ray emission from the inner disc of M33

Warwick, R. S.; Owen, R. A.

We present a study, based on archival XMM-Newton observations, of the extended X-ray emission associated with the inner disc of M33. After the exclusion of point sources with L_X > 2 × 10³⁵ergs^-1 (0.3-6 keV), we investigate both the morphology and spectrum of the residual X-ray emission, comprising the integrated…

A far-infrared survey at the North Galactic Pole - I. Nearby star-forming galaxies and effect of confused sources on source counts

Kotilainen, Jari K.; Juvela, Mika; Mattila, Kalevi +3 more

We present follow-up observations of the far-infrared (FIR) sources at 90, 150 and 180 µm detected as part of the ISOPHOT EBL project, which has recently measured the absolute surface brightness of the cosmic infrared background (CIRB) radiation for the first time independently from COBE data. We have observed the fields at the North Galacti…

Emission lines of FeXI in the 257-407Å wavelength region observed in solar spectra from EIS/Hinode and SERTS

Mathioudakis, M.; Keenan, F. P.; Davila, J. M. +5 more

Theoretical emission-line ratios involving FeXI transitions in the 257-407Å wavelength range are derived using fully relativistic calculations of radiative rates and electron impact excitation cross-sections. These are subsequently compared with both long wavelength channel Extreme-Ultraviolet Imaging Spectrometer (EIS) spectra from the Hinode sat…

Erratum: Adiabatic chaos in the Prometheus-Pandora system

Shevchenko, Ivan I.