Browsing Articles by Title

Now showing items 518-537 of 753

Probing the geometry and motion of AGN coronae through accretion disc emissivity profiles

Gonzalez, A. G.; Wilkins, D. R.; Gallo, Luigi C. (Oxford University Press, 2017-12)

To gain a better understanding of the inner disc region that comprises active galactic nuclei, it is necessary to understand the pattern in which the disc is illuminated (the emissivity profile) by X-rays emitted from the ...
Procedural learning in Tourette syndrome, ADHD, and comorbid Tourette-ADHD: Evidence from a probabilistic sequence learning task

Takacs, A.; Shilon, Y.; Janacsek, K.; Kóbor, A.; Tremblay, Antoine; Németh, D.; Ullman, M. T. (Elsevier, 2017-10)

Procedural memory, which is rooted in the basal ganglia, plays an important role in the implicit learning of motor and cognitive skills. Few studies have examined procedural learning in either Tourette syndrome (TS) or ...
The production and distribution of pottery at Pompeii: A review of the evidence; Part 1, Production

Pena, J. Theodore; McCallum, Myles (Archaeological Institute of America, 2009-01)

This study, in two parts, reviews the evidence from Pompeii for the production and distribution of pottery. Part 1, the present article, considers the production of pottery. Evidence is scant for the pre-Roman period but ...
The production and distribution of pottery at Pompeii: A review of the evidence; Part 2, The material basis for production and distribution

Pena, J. Theodore; McCallum, Myles (Archaeological Institute of America, 2009-04)

This study, in two parts, reviews the evidence from Pompeii for the production and distribution of pottery. Part 1 (AJA1 13 [2009] 57-79) considers the production of pottery. Part 2, the present article, examines the ...
Properties of 42 solar-type Kepler targets from the Asteroseismic Modeling Portal

Metcalfe, T. S.; Creevey, O. L.; Drogan, G.; Mathur, S.; Xu, H.; Bedding, T. R.; Chaplin, W. J.; Christensen-Dalsgaard, J.; Karoff, C.; Trampedach, R.; Gruberbauer, Michael; Guenther, David B. (The American Astronomical Society, 2014-10)

Recently the number of main-sequence and subgiant stars exhibiting solar-like oscillations that are resolved into individual mode frequencies has increased dramatically. While only a few such data sets were available for ...
Properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies

Foschini, L.; Berton, M.; Caccianiga, A.; Ciroi, S.; Cracco, V.; Peterson, B. M.; Angelakis, E.; Braito, V.; Fuhrmann, L.; Gallo, Luigi C. (EDP Sciences, 2015-03)

We have conducted a multiwavelength survey of 42 radio loud narrow-line Seyfert 1 galaxies (RLNLS1s), selected by searching among all the known sources of this type and omitting those with steep radio spectra. We analyse ...
Properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies (Corrigendum)

Foschini, L.; Berton, M.; Caccianiga, A.; Ciroi, S.; Cracco, V.; Peterson, B. M.; Angelakis, E.; Braito, V.; Fuhrmann, L.; Gallo, Luigi C.; Grupe, D.; Järvelä, E.; Kaufmann, S.; Komossa, S.; Kovalev, Y. Y.; Lähteenmäki, A.; Lisakov, M. M.; Lister, M. L.; Mathur, S.; Richards, J. L.; Romano, P.; Sievers, A.; Tagliaferri, G.; Tammi, J.; Tibolla, O.; Tornikoski, M.; Vercellone, S.; La Mura, G.; Maraschi, L.; Rafanelli, P. (EDP Sciences, 2017-07)

This article is an erratum for: Properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies (Astronomy & Astrophysics vol 575, A13, 2015).
Properties of galactic B[e] supergiants III. MWC 300

Men'shchikov, A. B.; Miroshnichenko, A. S.; Levato, H.; Bjorkman, K. S.; Grosso, M.; Manset, N.; Rudy, R. J.; Lynch, D. K.; Mazuk, S.; Venturini, C. C. (European Southern ObservatoryEDP Sciences, 2004-04)

We present the results of optical and near-IR spectroscopic and mid-IR imaging observations of the emission-line star MWC 300. Its properties and evolutionary state are still under debate (a B[e] supergiant or a Herbig Be ...
Properties of galactic B[e] supergiants V. Two-dimensional radiative transfer model of RY Sct and its dusty disc

Men'shchikov, A. B.; Miroshnichenko, A. S. (European Southern ObservatoryEDP Sciences, 2005-11)

We present results of the first two-dimensional radiative transfer modelling of the eclipsing binary RY Sct and its dusty disc. Assuming an effective temperature T[subscript *] = 27 000 K for both components and the distance ...
Properties of simulated Milky Way-mass galaxies in loose group and field environments

Few, C. G.; Gibson, Brad K.; Courty, S.; Michel-Dansac, L.; Brook, C. B.; Stinson, G. S. (EDP Sciences, 2012-11)

Aims. We test the validity of comparing simulated field disk galaxies with the empirical properties of systems situated within environments more comparable to loose groups, including the Milky Way’s Local Group. Methods. ...
The properties of the local spiral arms from RAVE data: two-dimensional density wave approach

Siebert, A.; Famaey, B.; Binney, J.; Burnett, B.; Faure, C.; Minchev, I.; Williams, M. E. K.; Bienayme, O.; Bland-Hawthorn, J.; Boeche, C.; Gibson, Brad K. (Oxford University Press, 2012-09)

Using the Radial Velocity Experiment (RAVE) survey, we recently brought to light a gradient in the mean galactocentric radial velocity of stars in the extended solar neighbourhood. This gradient likely originates from ...
A proposed modification of the rate equations for reactions on grain surfaces

Casselli, P.; Hasegawa, T. I.; Herbst, Eric (American Astronomical Society and IOP Publishing, 1998-03-01)

The rate equations currently utilized for grain reactions in gas-grain chemical models of interstellar clouds are inappropriate under certain conditions because of the discrete nature of grain particles. Appropriate ...
Proton radius of [superscript 14]Be from measurement of charge-changing cross sections

Terashima, S.; Tanihata, I.; Kanungo, Rituparna; Estrade, Alfredo; Horiuchi, W.; Ameil, F.; Atkinson, J.; Ayyad, Y.; Cortina-Gil, D.; Dillmann, I. (Oxford University Press, 2014-10-06)

The charge-changing cross sections of ^7,9−12,14Be have been measured at 900A MeV on a carbon target. These cross sections are discussed both in terms of a geometrical and a Glauber model. From several ...
Proton–proton fusion in effective field theory to fifth order

Butler, Malcolm; Chen, Jiunn-Wei (Elsevier Science, 2001-11)

The proton–proton fusion process pp [right arrow] de[superscript +] v[subscript e] is calculated at threshold to fifth order in pionless effective field theory. There are two unknown two-body currents contributing at the ...
Pulsation analysis of V 588 MON AND V 589 MON observed with the MOST AND CoRoT satellites

Zwintz, K.; Kallinger, T.; Guenther, David B.; Gruberbauer, Michael; Kuschnig, R.; Weiss, W. W.; Auvergne, M.; Jorda, L.; Favata, F.; Matthews, J.; Fischer, M. (American Astronomical SocietyIOP Publishing, 2011-03-01)

The two pulsating pre-main sequence (PMS) stars V 588 Mon and V 589 Mon were observed by CoRoT for 23.4 days in 2008 March during the Short Run SRa01 and in 2004 and 2006 by MOST for a total of ∼70 days. We present their ...
The pulsation mode and distance of the Cepheid FF Aquilae

Turner, David Gerald, 1945-; Kovtyukh, V. V.; Luck, R. E.; Berdnikov, L. N. (IOP Publishing Limited, 2013-07-20)

The determination of pulsation mode and distance for field Cepheids is a complicated problem best resolved by a luminosity estimate. For illustration a technique based on spectroscopic luminosity discrimination is applied ...
The pulsation mode of the Cepheid Polaris

Turner, David Gerald, 1945-; Kovtyukh, V. V.; Usenko, I. A.; Gorlova, N. I. (IOP Publishing Limited, 2013-01-01)

A previously derived photometric parallax of 10.10 ± 0.20 mas, d = 99 ± 2 pc, is confirmed for Polaris by a spectroscopic parallax derived using line ratios in high dispersion spectra for the Cepheid. The ...
Pulsation models for the roAp star HD 134214

Saio, H.; Gruberbauer, Michael; Weiss, W. W.; Matthews, J. M.; Ryabchikova, T. (Oxford University Press, 2012-02)

Precise time series photometry with the MOST satellite has led to identification of 10 pulsation frequencies in the rapidly oscillating Ap (roAp) star HD134214. We have fitted the observed frequencies with theoretical ...
Pulsation of the K 2.5 giant star GSC 09137-03505?

Guenther, David B.; Kallinger, T.; Zwintz, K.; Pamyatnykh, A. A.; Weiss, W. W. (EDP Sciences, 2005-04)

In July, 1999, the Hubble Space Telescope (HST) pointed for more than 8 days continuously at the globular cluster 47 Tucanae. Two guide stars were used during this campaign by the Fine Guidance Sensors (FGS). Using more ...
The pulsation properties of Procyon A

Guenther, David B.; Chaboyer, Brian; Demarque, P. (American Astronomical Society, 1999-11-01)

A grid of stellar evolution models for Procyon A has been calculated. These models include the best physics available to us (including the latest opacities and equation of state) and are based on the revised astrometric ...