Search Publications
Lyα emitters in the GOODS-S field. A powerful pure nebular SED with N IV] emission at z = 5.563
Teimoorinia, H.; Fosbury, R. A. E.; Raiter, A.
Context. The Great Observatories Origins Deep Survey (GOODS) has provided us with one of the deepest multi-wavelength views of the distant universe. The combination of multi-band photometry and optical spectroscopy has resulted in the identification of sources whose redshifts extend to values in excess of six. Amongst these distant sources are Lyα…
Mapping the interstellar medium in galaxies with Herschel/SPIRE
Elbaz, D.; Pérez-Fournon, I.; Bock, J. J. +57 more
The standard method of mapping the interstellar medium in a galaxy, by observing the molecular gas in the CO 1-0 line and the atomic gas in the 21-cm line, is largely limited with current telescopes to galaxies in the nearby universe. In this letter, we use SPIRE observations of the galaxies M 99 and M 100 to explore the alternative approach of ma…
Evolution of interstellar dust with Herschel. First results in the photodissociation regions of NGC 7023
Miville-Deschênes, M. -A.; Boulanger, F.; Abergel, A. +43 more
Context. In photodissociation regions (PDRs), the physical conditions and the excitation evolve on short spatial scales as a function of depth within the cloud, providing a unique opportunity to study how the dust and gas populations evolve with the excitation and physical conditions. The mapping of the PDRs in NGC 7023 performed during the scienc…
HST/WFPC2 observations of the LMC pulsar PSR B0540-69
Caraveo, P. A.; de Luca, A.; Mignani, R. P. +4 more
Context. The study of the younger, and brighter, pulsars is important for understanding the optical emission properties of isolated neutron stars through observations which, even in the 10 m-class telescope era, are much more challenging for older and fainter objects. PSR B0540-69, the second brightest (V~22) optical pulsar, is obviously a primary…
Star-formation in the central kpc of the starburst/LINER galaxy NGC 1614
Beswick, R.; Aalto, S.; Thomasson, M. +1 more
Aims: The aim is to investigate the star-formation and LINER (low ionization nuclear emission line region) activity within the central kiloparsec of the galaxy NGC 1614. In this paper the radio continuum morphology, which provides a tracer of both nuclear and star-formation activity, and the distribution and dynamics of the cold molecular and…
Herschel-SPIRE FTS spectroscopy of the carbon-rich objects AFGL 2688, AFGL 618, and NGC 7027
Ivison, R. J.; Olofsson, G.; Savini, G. +22 more
We present far-infrared and submillimetre spectra of three carbon-rich evolved objects, AFGL 2688, AFGL 618 and NGC 7027. The spectra were obtained with the SPIRE Fourier-transform spectrometer on board the Herschel Space Observatory, and cover wavelengths from 195-670 µm, a region of the electromagnetic spectrum hitherto difficult to study …
A study of the distant activity of comet C/2006 W3 (Christensen) with Herschel and ground-based radio telescopes
Blommaert, J. A. D. L.; Lara, L. M.; Küppers, M. +35 more
Comet C/2006 W3 (Christensen) was observed in November 2009 at 3.3 AU from the Sun with Herschel.The PACS instrument acquired images of the dust coma in 70-µm and 160-µm filters and spectra covering several H2O rotational lines. Spectra in the range 450-1550 GHz were acquired with SPIRE. The comet emission continuum from 70 …
Benchmarking atomic data for astrophysics: Fe xi
Del Zanna, G.
High-resolution spectroscopic observations of the solar corona and laboratory measurements are used to review all the line identifications for Fe xi, from the EUV to the visible. The results of the atomic structure and scattering calculations are presented elsewhere, while detailed comparisons between observed and predicted wavelengths and intensi…
Long period oscillations in sunspots
Bakunina, I. A.; Nakariakov, V. M.; Hnat, B. +2 more
Long period oscillations of the gyroresonant emission from sunspot atmospheres are studied. Time series data generated from the sequences of images obtained by the Nobeyama Radioheliograph operating at a frequency of 17 GHz for three sunspots have been analysed and are found to contain significant periods in the range of several tens of minutes. W…
A cometary origin for CO in the stratosphere of Saturn?
Hartogh, P.; Lellouch, E.; Encrenaz, T. +6 more
Context. The CO(3-2) line has been observed in the atmosphere of Saturn. The CO(3-2) observation proves that an external source of CO exists in the stratosphere of the planet.
Aims: We attempt to constrain the type and magnitude of the external source of CO in the atmosphere of Saturn, by observing the emission core of the CO(6-5) line.
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