Beecroft Institute for Particle Astrophysics and Cosmology: publications

A search for star formation around the Galactic halo B-type star PHL 346

Astronomy and Astrophysics 306:1 (1996) 119-124

Authors:

NC Hambly, KD Wood, EP Keenan, D Kilkenny, PL Dufton, L Miller, G Gilmore, MJ Irwin, EJ Totten

Abstract:

A search is presented for stars that may have formed coevally with the apparently young halo star PHL 346. Candidates were selected for spectroscopy from UBR Schmidt Telescope plates in U.K. Schmidt Telescope survey field 603 scanned with the COSMOS facility at the Royal Observatory, Edinburgh. Spectroscopic observations at ∼ 3.5 Å resolution were made of 72 field stars using the 1.9m telescope at the South African Astronomical Observatory; 16 A- and B-type stars were found, one of which had the appropriate spectral type and radial velocity to be associated with PHL 346. Further photometry and spectroscopy confirmed this identification. The remaining low gravity early-type stars have a mean LSR radial velocity of -75 km s-1, consistent with a non-rotating halo Population.

Causality, randomness, and the microwave background

PHYSICAL REVIEW LETTERS 76:9 (1996) 1413-1416

Authors:

A Albrecht, D Coulson, P Ferreira, J Magueijo

Doppler peaks from active perturbations

PHYSICAL REVIEW LETTERS 76:15 (1996) 2617-2620

Authors:

J Magueijo, A Albrecht, D Coulson, P Ferreira

How anisotropic is our Universe?

PHYSICAL REVIEW LETTERS 77:14 (1996) 2883-2886

Authors:

EF Bunn, PG Ferreira, J Silk

Structure of Doppler peaks induced by active perturbations

PHYSICAL REVIEW D 54:6 (1996) 3727-3744

Authors:

J Magueijo, A Albrecht, P Ferreira, D Coulson

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