• Login
    View Item 
    •   Maryland Shared Open Access Repository Home
    • ScholarWorks@UMBC
    • UMBC Academic Centers and Institutes
    • UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
    • View Item
    •   Maryland Shared Open Access Repository Home
    • ScholarWorks@UMBC
    • UMBC Academic Centers and Institutes
    • UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Developing the Physical Understanding of Intermediate Polars: An X-Ray Study of TV Col and V2731 Oph

    Thumbnail
    Files
    Developing the Physical Understanding of Intermediate Polars.pdf (920.7Kb)
    Links to Files
    https://iopscience.iop.org/article/10.3847/1538-4357/ab2b41
    Permanent Link
    https://doi.org/10.3847/1538-4357/ab2b41
    http://hdl.handle.net/11603/16015
    Collections
    • UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
    • UMBC Faculty Collection
    • UMBC Goddard Planetary Heliophysics Institute (GPHI)
    Metadata
    Show full item record
    Author/Creator
    Oliveira, R. Lopes de
    Mukai, K.
    Date
    2019-08-02
    Type of Work
    14 pages
    Text
    journal articles
    Citation of Original Publication
    Oliveira, R. Lopes de; Mukai, K.; Developing the Physical Understanding of Intermediate Polars: An X-Ray Study of TV Col and V2731 Oph; The Astrophysical Journal 880,2; https://doi.org/10.3847/1538-4357/ab2b41
    Rights
    This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
    @2019 IOP
    Subjects
    novae
    cataclysmic variables
    stars
    individual (TV Col, V2731 Oph)
    ultraviolet
    X-rays
    binaries
    Abstract
    The X-rays in intermediate polars (IPs) originate in a compact region near the surface of a magnetic white dwarf (WD) and interact with the complex environment surrounding the emission region. Here we report a case study of two IPs, TV Col and V2731 Oph, with selected archival X-ray observations (NuSTAR, Swift, Suzaku, and XMMNewton). For TV Col, we were successful in simultaneously accounting for the primary X-rays, the secondary X-rays due to Compton scattering and fluorescence, and the effects of local absorbers. In this case, we were able to demonstrate that the shock height is small, based on the high reflection amplitude; hence, the maximum temperature of the post-shock region can be used to derive the WD mass of 0.735 ± 0.015 Me. Despite the high specific accretion rate required to explain the small shock height, we do not detect any spin modulation in our NuSTAR data, consistent with the modest amount of complex absorption seen spectroscopically. We argue that our results are robust because they are based on the joint temporal–spectral analysis of broadband X-ray data. The spectrum of V2731 Oph is more highly absorbed. Through our analysis of the Suzaku data, we present a spectral model with nitrogen overabundance without the previously claimed soft blackbody that should be further explored. We have been unable to constrain the reflection amplitude for V2731 Oph; this and the detection of spin modulation above 10 keV suggest that it may have a tall shock. Hence, we only derive a lower limit to the mass of its WD (>0.9 Me).


    Albin O. Kuhn Library & Gallery
    University of Maryland, Baltimore County
    1000 Hilltop Circle
    Baltimore, MD 21250
    www.umbc.edu/scholarworks

    Contact information:
    Email: scholarworks-group@umbc.edu
    Phone: 410-455-3021


    If you wish to submit a copyright complaint or withdrawal request, please email mdsoar-help@umd.edu.

     

     

    My Account

    LoginRegister

    Browse

    This CollectionBy Issue DateTitlesAuthorsSubjectsType

    Statistics

    View Usage Statistics


    Albin O. Kuhn Library & Gallery
    University of Maryland, Baltimore County
    1000 Hilltop Circle
    Baltimore, MD 21250
    www.umbc.edu/scholarworks

    Contact information:
    Email: scholarworks-group@umbc.edu
    Phone: 410-455-3021


    If you wish to submit a copyright complaint or withdrawal request, please email mdsoar-help@umd.edu.