2015/01/20 by A. Lutovinov, A. A. Lutovinov, Sergey S. Tsygankov +11 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Cyclotron #Detector #Galaxy #High-pressure geophysics and materials #Luminosity #Nuclear physics #Observatory #Optics #Phase (matter) #Physics #Plasma #Pulsar #Pulsars and Gravitational Waves Research #Pulse (music) #Reflection (computer programming) #Spectral line #Spectroscopy #X-ray pulsar #astro-ph.GA #astro-ph.HE #astro-ph.IM #astro-ph.SR
paper · pdf · doi:10.1093/mnras/stv125
12 pages, 10 figures, 3 tables, accepted for publication in MNRAS
arxiv created 2015/01/20 · openalex publication_date 2015/02/26 · arxiv updated 2015/06/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the results of the pulse-phase- and luminosity-resolved spectroscopy of the transient X-ray pulsar V 0332+53, performed for the first time in a wide luminosity range (1–40) × 1037 erg s−1 during a giant outburst observed by the RXTE observatory in 2004 December–2005 February. We characterize the spectra quantitatively and built the detailed ‘three-dimensional’ picture of spectral variations with pulse phase and throughout the outburst. We show that all spectral parameters are strongly variable with the pulse phase, and the pattern of this variability significantly changes with luminosity directly reflecting the associated changes in the structure of emission regions and their beam patterns. Obtained results are qualitatively discussed in terms of the recently developed reflection model for the formation of cyclotron lines in the spectra of X-ray pulsars.