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Jet trails and mach cones: The interaction of microquasars with the interstellar medium

Astrophysical Journal 742:1 (2011)

Authors:

D Yoon, B Morsony, S Heinz, K Wiersema, RP Fender, DM Russell, R Sunyaev

Abstract:

A subset of microquasars exhibits high peculiar velocity with respect to the local standard of rest due to the kicks they receive when being born in supernovae. The interaction between the radio plasma released by microquasar jets from such high-velocity binaries with the interstellar medium must lead to the production of trails and bow shocks similar to what is observed in narrow-angle tailed radio galaxies and pulsar wind nebulae. We present a set of numerical simulations of this interaction that illuminate the long-term dynamical evolution and the observational properties of these microquasar bow-shock nebulae and trails. We find that this interaction always produces a structure that consists of a bow shock, a trailing neck, and an expanding bubble. Using our simulations to model emission, we predict that the shock surrounding the bubble and the neck should be visible in Hα emission, the interior of the bubble should be visible in synchrotron radio emission, and only the bow shock is likely to be detectable in X-ray emission. We construct an analytic model for the evolution of the neck and bubble shape and compare this model with observations of the X-ray binary SAX J1712.6-3739. © 2011. The American Astronomical Society. All rights reserved.

The Atlas3D project -- XIII. Mass and morphology of HI in early-type galaxies as a function of environment

(2011)

Authors:

Paolo Serra, Tom Oosterloo, Raffaella Morganti, Katherine Alatalo, Leo Blitz, Maxime Bois, Frederic Bournaud, Martin Bureau, Michele Cappellari, Alison F Crocker, Roger L Davies, Timothy A Davis, PT de Zeeuw, Pierre-Alain Duc, Eric Emsellem, Sadegh Khochfar, Davor Krajnovic, Harald Kuntschner, Pierre-Yves Lablanche, Richard M McDermid, Thorsten Naab, Marc Sarzi, Nicholas Scott, Scott C Trager, Anne-Marie Weijmans, Lisa M Young

The X-Shooter Lens Survey – I. Dark matter domination and a Salpeter-type initial mass function in a massive early-type galaxy

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 417:4 (2011) 3000-3009

Authors:

C Spiniello, LVE Koopmans, SC Trager, O Czoske, T Treu

A comparison between star formation rate diagnostics and rate of core collapse supernovae within 11 Mpc

(2011)

Authors:

MT Botticella, SJ Smartt, RC Kennicutt, E Cappellaro, M Sereno, JC Lee

Oxford SWIFT IFS and multi-wavelength observations of the Eagle galaxy at z=0.77

Monthly Notices of the Royal Astronomical Society Blackwell Publishing Inc. (2011)

Authors:

SA Kassin, L Fogarty, T Goodsall, FJ Clarke, RWC Houghton, G Salter, N Thatte, M Tecza, RL Davies, BJ Weiner, CNA Willmer, S Salim, MC Cooper, JA Newman, K Bundy, CJ Conselice, AM Koekemoer, L Lin, LA Moustakas, T Wang

Abstract:

The `Eagle' galaxy at a redshift of 0.77 is studied with the Oxford Short Wavelength Integral Field Spectrograph (SWIFT) and multi-wavelength data from the All-wavelength Extended Groth strip International Survey (AEGIS). It was chosen from AEGIS because of the bright and extended emission in its slit spectrum. Three dimensional kinematic maps of the Eagle reveal a gradient in velocity dispersion which spans 35-75 +/- 10 km/s and a rotation velocity of 25 +/- 5 km/s uncorrected for inclination. Hubble Space Telescope images suggest it is close to face-on. In comparison with galaxies from AEGIS at similar redshifts, the Eagle is extremely bright and blue in the rest-frame optical, highly star-forming, dominated by unobscured star-formation, and has a low metallicity for its size. This is consistent with its selection. The Eagle is likely undergoing a major merger and is caught in the early stage of a star-burst when it has not yet experienced metal enrichment or formed the mass of dust typically found in star-forming galaxies.