Search Publications
Interferometric Detections of GOODS 850-5 at 1 mm and 1.4 GHz
Morrison, G.; Walter, F.; Dannerbauer, H.
We have obtained a position (at subarcsecond accuracy) of the submillimeter bright source GOODS 850-5 (also known as GN 10) in the GOODS-North field using the IRAM Plateau de Bure interferometer at 1.25 mm wavelengths (MM J123633+6214.1; flux density: S1.25 mm = 5.0 +/- 1.0 mJy). This source has no optical counterpart in deep ACS imagin…
Spatially resolved dusty torus toward the red supergiant WOH G64 in the Large Magellanic Cloud
Weigelt, G.; Hofmann, K. -H.; Driebe, T. +2 more
Aims: We present N-band spectro-interferometric observations of the red supergiant
The kinematic footprints of five stellar streams in Andromeda's halo
Tanvir, N.; Rich, R. M.; Koch, A. +12 more
We present a spectroscopic analysis of five stellar streams (`A', `B', `Cr', `Cp' and `D') as well as the extended star cluster, EC4, which lies within Stream`C', all discovered in the halo of M31 from our Canada-France-Hawaii Telescope/MegaCam survey. These spectroscopic results were initially serendipitous, making use of our existing observation…
The faint and extremely red K-band-selected galaxy population in the DEEP2/Palomar fields
Conselice, C. J.; Bundy, K.; Lotz, J. +3 more
We present in this paper an analysis of the faint and red near-infrared (NIR) selected galaxy population found in NIR imaging from the Palomar Observatory Wide-Field Infrared Survey. This survey covers 1.53 deg2 to 5σ detection limits of Kvega = 20.5-21 and Jvega = 22.5, and overlaps with the DEEP2 spectroscopic re…
The Accuracy of Morphological Decomposition of Active Galactic Nucleus Host Galaxies
Urry, C. M.; Simmons, B. D.
In order to assess the accuracy with which we can determine the morphologies of AGN host galaxies, we have simulated more than 50,000 ACS images of galaxies with z < 1.25, using image and noise properties appropriate for the GOODS survey. We test the effect of central point-source brightness on host galaxy parameter recovery with a set of simul…
Frequent Occurrence of High-Speed Local Mass Downflows on the Solar Surface
Kubo, M.; Lites, B. W.; Ichimoto, K. +7 more
We report on new spectropolarimetric measurements with simultaneous filter imaging observation, revealing the frequent appearance of polarization signals indicating high-speed, probably supersonic, downflows that are associated with at least three different configurations of magnetic fields in the solar photosphere. The observations were carried o…
Astrometric and photometric monitoring of GQ Lupi and its sub-stellar companion
Neuhäuser, R.; Schmidt, T. O. B.; Mugrauer, M. +2 more
Context: Neuhäuser et al. (2005, A&A, 435, L13) presented direct imaging evidence for a sub-stellar companion to the young T Tauri star GQ Lupi. Common proper motion was highly significant, but no orbital motion was detected. Faint luminosity, low gravity, and a late-M/early-L spectral type indicated that the companion is either a planet or a …
Chandra Observation of PSR B1823-13 and Its Pulsar Wind Nebula
Pavlov, G. G.; Kargaltsev, O.; Brisken, W. F.
An observation of the Vela-like pulsar B1823-13 and its synchrotron nebula with the Chandra X-Ray Observatory allowed us to resolve the pulsar and the fine structure of the nebula. The pulsar's spectrum fits a power-law model with a photon index ΓPSR ≈ 2.4 for the plausible hydrogen column density nH = 1 × 1022 cm<…
Dust processing in photodissociation regions. Mid-IR emission modelling
Abergel, A.; Habart, E.; Compiègne, M. +1 more
Context: Mid-infrared spectroscopy of dense illuminated ridges (or photodissociation regions, PDRs) suggests dust evolution. Such evolution must be reflected in the gas physical properties through processes like photo-electric heating or H2 formation.
Aims: With Spitzer Infrared Spectrograph (IRS) and ISOCAM data, we study the mid-IR emission …
X-ray variability of the Seyfert 1 Markarian 335: power spectrum and time lags
Arévalo, P.; McHardy, I. M.; Summons, D. P.
To investigate further the comparison between active galactic nuclei (AGN) and black hole X-ray binaries, we have studied the main X-ray variability properties of the Seyfert 1 galaxy Mrk 335. We put particular emphasis on the X-ray time lags, which is a potentially important diagnostic of physical models. From a 100 ks observation by XMM-Newton, …