Empire, Spectacle and the Patriot King: British Responses to Eighteenth-Century Russian Empire

The article was submitted on 11.05.2016.Обращаясь к описаниям представлений, устраиваемых русскими царями, в трудах британских путешественников, автор показывает противоречивый характер британского взгляда на Российскую империю XVIII в. Россия традиционно изображалась как «чужая» империя, а приверженность Британии свободе и разуму противопоставлялась духу несвободы самодержавного государства и иррациональной тяге русского народа к традициям. Однако британские авторы рассказывали в своих отзывах о русских царях, таких как Петр I и его последователи, изображая их как просвещенных монархов. Впечатления британцев о зрелищах, устраиваемых царями, с одной стороны, акцентируют внимание на личностях русских монархов и их реформах и, с другой, иллюстрируют ограниченность народа и его неспособность рассуждать здраво и бороться за свободу. Автор утверждает, что это противоречие сформировалось в представлении британцев о России под влиянием идей Болингброка о царе-реформаторе и России как стране, занимающей промежуточное положение между Востоком и Западом.The author uses examples of British travellers’ responses to Russian tsars’ spectacles to argue that the British view of the Russian Empire in the eighteenth century fosters a contradiction. Traditionally Russia was depicted as an imperial Other in which British liberty and its attachment to reason is contrasted with Russian servility within the autocratic state and Russian citizens’ irrational attachment to tradition. Yet British writers complicate this depiction with Peter the Great, and later tsars, who are depicted frequently as enlightened reformers. Indeed, British travellers’ depictions of tsars’ spectacles at once foreground the tsar’s enlightened reforms and the tsar’s person, but also are characterized as limiting the spectators’ capacity to reason and to pursue liberty. The author maintains that this contradiction is accommodated in the British thought by Bolingbroke’s notion of a reform-minded patriot king and Russia’s often-portrayed middle position between East and West

Modelling the Galaxy in the era of Gaia

The body of photometric and astrometric data on stars in the Galaxy has been growing very fast in recent years (Hipparcos/Tycho, OGLE-3, 2-Mass, DENIS, UCAC2, SDSS, RAVE, Pan Starrs, Hermes, ...) and in two years ESA will launch the Gaia satellite, which will measure astrometric data of unprecedented precision for a billion stars. On account of our position within the Galaxy and the complex observational biases that are built into most catalogues, dynamical models of the Galaxy are a prerequisite full exploitation of these catalogues. On account of the enormous detail in which we can observe the Galaxy, models of great sophistication are required. Moreover, in addition to models we require algorithms for observing them with the same errors and biases as occur in real observational programs, and statistical algorithms for determining the extent to which a model is compatible with a given body of data. JD5 reviewed the status of our knowledge of the Galaxy, the different ways in which we could model the Galaxy, and what will be required to extract our science goals from the data that will be on hand when the Gaia Catalogue becomes available.Comment: Proceedings of Joint Discussion 5 at IAU XXVII, Rio de Janeiro, August 2009; 31 page

First PPMXL photometric analysis of open cluster "Ruprecht 15"

We present here our first series in studying the astrophysical parameters of the open cluster "Ruprecht 15" using PPMXL1 database. In this context, the photometric, astrometry and statistical parameters for this cluster (limited radius, core and tidal radii, distances, membership, reddening, age, luminosity function, mass function, total mass, and the dynamical relaxation time) are determined for the first time.Comment: 14 pages, 8 figures, 1 tabl

The origin of the Gaia phase-plane spiral

A simple model is presented of the formation of the spiral the (z,v_z) phase plane of solar-neighbourhood stars that was recently discovered in Gaia data. The key is that the frequency Omega_z at which stars oscillate vertically depends on angular momentum about the z axis in addition to the amplitude of the star's vertical oscillations. Spirals should form in both and whenever a massive substructure, such as the Sgr dwarf galaxy, passes through the Galactic plane. The model yields similar spirals to those observed in both and . The primary driver is the component of the tidal force that lies in the plane. We investigate the longevity of the spirals and the mass of the substructure, but the approximations inherent in the model make quantitative results unreliable. The work relies heavily on a self-consistent, multi-component model of our Galaxy produced by the AGAMA package for f(J) modelling.Comment: 6 pages submitted to MNRA

Dynamical Models for the Milky Way

The only way to map the Galaxy's gravitational potential $\Phi({\bf x})$ and the distribution of matter that produces it is by modelling the dynamics of stars and gas. Observations of the kinematics of gas provide key information about gradients of $\Phi$ within the plane, but little information about the structure of $\Phi$ out of the plane. Traditional Galaxy models {\em assume}, for each of the Galaxy's components, arbitrary flattenings, which together with the components' relative masses yield the model's equipotentials. However, the Galaxy's isopotential surfaces should be {\em determined\/} directly from the motions of stars that move far from the plane. Moreover, from the kinematics of samples of such stars that have well defined selection criteria, one should be able not only to map $\Phi$ at all positions, but to determine the distribution function $f_i({\bf x},{\bf v})$ of each stellar population $i$ studied. These distribution functions will contain a wealth of information relevant to the formation and evolution of the Galaxy. An approach to fitting a wide class of dynamical models to the very heterogeneous body of available data is described and illustrated.Comment: 10 pages, LaTeX, style file and 4 figures included. Invited talk presented at the meeting ``Formation of the Galactic Halo ... Inside and Out'', Tucson, October 9-11. Full .ps file available at ftp://ftp.physics.ox.ac.uk/pub/local/users/dehnen/MilkyWayModels.ps.g

Deprojection of light distributions of nearby systems: perspective effect and non-uniqueness

Deriving the 3-dimensional volume density distribution from a 2-dimensional light distribution of a system yields generally non-unique results. The case for nearby dust-free systems is studied, taking into account the extra constraints from the perspective effect. It is shown analytically that a new form of non-uniqueness exists. We can design a Phantom Spheroid (PS) for a nearby system which preserves the intrinsic mirror symmetry and projected surface brightness of the system while changing the shape and the major-axis orientation of the system. A family of analytical models are given as functions of the distance ($D_0$) to the object and the amount ($\gamma$) of the superimposed PS density. The PS density, different from the well-known konuses of extragalactic systems, makes the luminosity of the system vary slightly with the distance $D_0$. The physical ranges for $\gamma$ and the major axis angles are constrained analytically by requiring a positive volume density everywhere. These models suggest that observations other than surface brightness maps are required to lift the degeneracy in the tilt angles and axis ratio of the central bar of the Milky Way.Comment: 21 single-spaced pages including 12 figures. Submitted to MNRA

Is the Dark Disc contribution to Dark Matter Signals important ?

Recent N-body simulations indicate that a thick disc of dark matter, co-rotating with the stellar disc, forms in a galactic halo after a merger at a redshift $z<2$. The existence of such a dark disc component in the Milky Way could affect dramatically dark matter signals in direct and indirect detection. In this letter, we discuss the possible signal enhancement in connection with the characteristics of the local velocity distributions. We argue that the enhancement is rather mild, but some subtle effects may arise. In particular, the annual modulation observed by DAMA becomes less constrained by other direct detection experiments

Modeling the flyby anomalies with dark matter scattering

We continue our exploration of whether the flyby anomalies can be explained by scattering of spacecraft nucleons from dark matter gravitationally bound to the earth. We formulate and analyze a simple model in which inelastic and elastic scatterers populate shells generated by the precession of circular orbits with normals tilted with respect to the earth's axis. Good fits to the data published by Anderson et al. are obtained.Comment: Latex, 20 pages; revised version has moved derivations to Appendices and gives further numerical results in Sec. III and in added Tables VI and VI

Using Auctions for Conservation Contracts to Protect Queensland's Vegetation: Lessons from the Vegetation Incentives Program

Auctions for conservation contracts are experiencing great popularity in Australia due to their perceived cost effectiveness. However, there is still much to be learned about this economic instrument. Queensland's state government recently decided to use an auction mechanism to allocate a $12 million incentives program. This was called the Queensland Vegetation Incentives Package (VIP), and was aimed at encouraging better protection and management of high value non-remnant vegetation. The PhD work of the presenting author is using the VIP as a case study to explore the use of auctions for conservation contracts in Queensland. In particular, observing the VIP gives insight into participant behaviour and the impact of the policy formation process on an auction for conservation contracts. The VIP is particularly interesting as this is the first time a tender mechanism is being used in Australia to distribute funds on a state-wide level. A preliminary analysis of the first two rounds has been undertaken and key lessons have been identified.Land Economics/Use, Q50, Q57, Q58,