We have obtained medium resolution spectra of the neutron star X-ray transient Aql X-1 during quiescence. We determine the spectral type of the companion star to be K1 and also estimate its rotation speed to be 62^+30^_-20_km/s. By measuring the width of the Hα emission line profile of the accretion disc, we estimate the binary inclination to ~50°
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It also provides access to IAC Preprints Repository here: https://research.iac.es/preprints/
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The rotation speed of the companion star in Aquila X-1.Shahbaz, T. et al.101997
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The SAURON project - XII. Kinematic substructures in early-type galaxies: evidence for discs in fast rotators
We analysed two-dimensional maps of 48 early-type galaxies obtained with the SAURON and OASIS integral-field spectrographs using kinemetry, a generalization of surface photometry to the higher order moments of the line-of-sight velocity distribution (LOSVD). The maps analysed include: reconstructed image, mean velocity, velocity dispersion, h3 and
Krajnović, Davor et al.Advertised on:
102008 -
The SAURON project - XIII. SAURON-GALEX study of early-type galaxies: the ultraviolet colour-magnitude relations and Fundamental Planes
We present Galaxy Evolution Explorer far-ultraviolet (FUV) and near-ultraviolet (NUV) imaging of 34 nearby early-type galaxies from the SAURON representative sample of 48 E/S0 galaxies, all of which have ground-based optical imaging from the MDM Observatory. The surface brightness profiles of nine galaxies (~26 per cent) show regions with blue UV
Jeong, Hyunjin et al.Advertised on:
102009 -
The SAURON Project - XIV. No escape from Vesc: a global and local parameter in early-type galaxy evolution
We present the results of an investigation of the local escape velocity (Vesc) - line strength index relationship for 48 early-type galaxies from the SAURON sample, the first such study based on a large sample of galaxies with both detailed integral field observations and extensive dynamical modelling. Values of Vesc are computed using multi
Scott, Nicholas et al.Advertised on:
102009 -
The SAURON project - XVII. Stellar population analysis of the absorption line strength maps of 48 early-type galaxies
We present a stellar population analysis of the absorption line strength maps for 48 early-type galaxies from the SAURON sample. Using the line strength index maps of Hβ, Fe5015 and Mgb, measured in the Lick/IDS system and spatially binned to a constant signal-to-noise ratio, together with predictions from up-to-date stellar population models, we
Kuntschner, Harald et al.Advertised on:
102010 -
The SAURON Survey of Early-Type Galaxies in the Nearby Universe
The aim of the SAURON collaboration, and the reason for building the instrument, is to study a representative sample of nearby ellipticals, lenticulars and bulges of early-type spirals, in order to measure their intrinsic shapes, velocity and metallicity distributions, and to gain insight into the relation between their stellar and gaseous.
Peletier, R. F. et al.Advertised on:
102001