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UBV(RI)C JHK observations of Hipparcos-selected nearby stars
Kilkenny, D.; Marang, F.; Koen, C. +1 more
We present homogeneous, standardized UBV(RI)C photometry for over 700 nearby stars selected on the basis of Hipparcos parallaxes. Additionally, we list JHK photometry for about half of these stars, as well as L photometry for 86 of the brightest. A number of stars with peculiar colours or anomalous locations in various colour-magnitude …
A Bayesian test for periodic signals in red noise
Vaughan, S.
Many astrophysical sources, especially compact accreting sources, show strong, random brightness fluctuations with broad power spectra in addition to periodic or quasi-periodic oscillations (QPOs) that have narrower spectra. The random nature of the dominant source of variance greatly complicates the process of searching for possible weak periodic…
Evolution of dust temperature of galaxies through cosmic time as seen by Herschel
Berta, S.; Magnelli, B.; Nordon, R. +112 more
We study the dust properties of galaxies in the redshift range 0.1 <~ z <~ 2.8 observed by the Herschel Space Observatory in the field of the Great Observatories Origins Deep Survey-North as part of the PACS Extragalactic Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) key programmes. Infrared (IR) luminosity (LIR
Black hole accretion discs in the canonical low-hard state
Fabian, A. C.; Miller, J. M.; Reis, R. C.
Stellar mass black holes in the low-hard state may hold clues to jet formation and basic accretion disc physics, but the nature of the accretion flow remains uncertain. A standard thin disc can extend close to the innermost stable circular orbit, but the inner disc may evaporate when the mass accretion rate is reduced. Blackbody-like continuum emi…
Pixel-based correction for Charge Transfer Inefficiency in the Hubble Space Telescope Advanced Camera for Surveys
Ellis, Richard; Leauthaud, Alexie; Massey, Richard +4 more
Charge Transfer Inefficiency (CTI) due to radiation damage above the Earth's atmosphere creates spurious trailing in Hubble Space Telescope (HST) images. Radiation damage also creates unrelated warm pixels - but these happen to be perfect for measuring CTI. We model CTI in the Advanced Camera for Surveys (ACS)/Wide Field Channel and construct a ph…
Optical and near-infrared coverage of SN 2004et: physical parameters and comparison with other Type IIP supernovae
Smartt, S. J.; Maguire, K.; Cappellaro, E. +22 more
We present new optical and near-infrared (NIR) photometry and spectroscopy of the Type IIP supernova (SN), SN 2004et. In combination with already published data, this provides one of the most complete studies of optical and NIR data for any Type IIP SN from just after explosion to +500d. The contribution of the NIR flux to the bolometric light cur…
Feeding versus feedback in NGC4151 probed with Gemini NIFS - II. Kinematics
Martini, P.; Storchi-Bergmann, T.; Riffel, Rogemar A. +3 more
We have used the Gemini Near-infrared Integral Field Spectrograph (NIFS) to map the gas kinematics of the inner ~200 × 500pc2 of the Seyfert galaxy NGC4151 in the Z, J, H and K bands at a resolving power of >=5000 and spatial resolution of ~8pc. The ionized gas emission is most extended along the known ionization bi-cone at position …
On the fraction of star clusters surviving the embedded phase
Bastian, N.; Kennicutt, R. C.; Goddard, Q. E.
In this paper we derive ages and masses for 276 clusters in the merger galaxy NGC 3256. This was achieved by taking accurate photometry in four wavebands from archival Hubble Space Telescope images. Photometric measurements are compared to synthetic stellar population (SSP) models to find the most probable age, mass and extinction. The cluster pop…
Gas, dust and stars in the SCUBA galaxy, SMMJ02399-0136: the EVLA reveals a colossal galactic nursery
Kneib, J. -P.; Ivison, R. J.; Smail, Ian +5 more
We present new multiwavelength observations of the first submillimetre-selected galaxy (SMG) SMMJ02399-0136 at z = 2.8. These observations include mapping of the CO J=1->0 emission using elements of the Expanded Very Large Array, as well as high-resolution 1.4-GHz imaging and optical/infrared (IR) data from the Very Large Array, Hubble Space Te…
A Hubble Space Telescope NICMOS and ACS morphological study of z ~ 2 submillimetre galaxies
Ivison, R. J.; Smail, Ian; Alexander, D. M. +6 more
We present a quantitative morphological analysis using Hubble Space Telescope Near Infrared Camera and Multi-Object Spectrometer H160-band imaging and Advanced Camera for Surveys I775-band imaging of 25 spectroscopically confirmed submillimetre galaxies (SMGs) which have redshifts between (). Our analysis also employs a compa…