Search Publications
Observations of CO in the atmosphere of Mars with PFS onboard Mars Express
Forget, F.; Lellouch, E.; Encrenaz, T. +8 more
We have analyzed spectra of CO recorded with the instrument PFS onboard Mars Express in the (1-0) 4.7µm band. The dataset we used ranges in time from January until June 2004 ( LS=331∘.17 until LS=51∘.61; end of Mars Year 26, beginning of Mars Year 27). The aim of this work was to determine the ampl…
Circumstellar water vapour in M-type AGB stars: constraints from H{2}O(1{10}-1{01}) lines obtained with Odin
Olofsson, H.; Justtanont, K.; Larsson, B. +8 more
Context: A detailed radiative transfer code has been previously used to model circumstellar ortho-{H_2O} line emission towards six M-type asymptotic giant branch stars using Infrared Space Observatory Long Wavelength Spectrometer data. Collisional and radiative excitation, including the {ν_2=1} state, was considered.
Aims: Spectrally resolved …
Hubble Space Telescope Discovery of a z = 3.9 Multiply Imaged Galaxy Behind the Complex Cluster Lens Warps J1415.1+36 at z = 1.026
Gladders, M. D.; Huang, X.; Lidman, C. +27 more
We report the discovery of a multiply lensed Lyα emitter at z = 3.90 behind the massive cluster WARPS J1415.1+3612 at z = 1.026. Images taken by the Hubble Space Telescope using the Advanced Camera for Surveys reveal a complex lensing system that produces a prominent, highly magnified arc and a triplet of smaller arcs grouped tightly around a spec…
AKARI Infrared Observations of the Supernova Remnant G292.0+1.8: Unveiling Circumstellar Medium and Supernova Ejecta
Onaka, Takashi; Jeong, Woong-Seob; Koo, Bon-Chul +6 more
We present the results of AKARI observations of the O-rich supernova remnant (SNR) G292.0+1.8 using six Infrared Camera (IRC) and four Far-Infrared Surveyor bands covering 2.7-26.5 µm and 50-180 µm, respectively. The AKARI images show two prominent structures; a bright equatorial ring (ER) structure along the east-west direction and an…
A spatial study of the mid-IR emission features in four Herbig Ae/Be stars
Waters, L. B. F. M.; Tielens, A. G. G. M.; Boersma, C. +5 more
Context: Infrared (IR) spectroscopy and imaging provide a prime tool to study the characteristics of polycyclic aromatic hydrocarbon (PAH) molecules and the mineralogy in regions of star formation. Herbig Ae/Be stars are known to have varying amounts of natal cloud material present in their vicinity.
Aims: Our aim is to study the characteristi…
Suzaku Detection of Superhard X-Ray Emission from the Classical Nova V2491 Cygni
Mukai, K.; Ness, J. -U.; Takahashi, H. +4 more
We report the detection of superhard (>10 keV) X-ray emission extending up to 70 keV from the classical nova V2491 Cygni using the Suzaku observatory. We conducted two ~20 ks target-of-opportunity observations 9 and 29 days after the outburst on 2008 April 11, yielding wide energy range spectra by combining the X-ray Imaging Spectrometer and th…
Surface-Focused Seismic Holography of Sunspots: II. Expectations from Numerical Simulations Using Sound-Speed Perturbations
Birch, A. C.; Braun, D. C.; Hanasoge, S. M. +1 more
Helioseismic observations of sunspots show that wave travel times, at fixed horizontal phase speed, depend on the temporal frequency of the waves employed in the data analysis. This frequency variation has been suggested to be consistent with near-surface (vertical length scales of order one Mm or smaller) changes in wave propagation properties re…
The flared inner disk of the Herbig Ae star AB Aurigae revealed by VLTI/MIDI in the N-band
Wolf, S.; Lopez, B.; Leinert, Ch. +4 more
Aims: We aim at using the long baselines of the VLT Interferometer and the mid-IR combiner MIDI (8-13 µm) to derive the morphology of the protoplanetary disk surrounding the Herbig Ae star AB Aurigae
Methods: We present the first N-band analysis of AB Aur performed with a maximum angular resolution of 17 mas (2.5 AU at the Taurus-Auriga …
Expanding the Search for Galaxies at z ~ 7-10 with New NICMOS Parallel Fields
Giavalisco, Mauro; Teplitz, Harry I.; Siana, Brian +7 more
We have carried out a search for galaxies at z ~ 7-10 in ~14.4 arcmin2 of new NICMOS parallel imaging taken in the Great Observatories Origins Deep Survey (5.9 arcmin2), the Cosmic Origins Survey (7.2 arcmin2), and SSA22 (1.3 arcmin2). These images reach 5σ sensitivities of J 110 = 26.0-27.5 (…
Long tails on thermonuclear X-ray bursts from neutron stars: a signature of inward heating?
Homan, J.; in't Zand, J. J. M.; Méndez, M. +3 more
We report the discovery of one-hour long tails on the few-minutes long X-ray bursts from the “clocked burster” GS 1826-24. We propose that the tails are due to enduring thermal radiation from the neutron star envelope. The enduring emission can be explained by cooling of deeper neutron star layers that were heated up through inward conduction of h…