Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/26638
Title: Spectral and Timing Properties of IGR J17091-3624 in the Rising Hard State During Its 2016 Outburst
Authors: Xu, Yanjun
García, Javier A.
Fürst, Felix
Harrison, Fiona A.
Walton, Dominic J.
Tomsick, John A.
BACHETTI, Matteo 
King, Ashley L.
Madsen, Kristin K.
Miller, Jon M.
Grinberg, Victoria
Issue Date: 2017
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 851
Issue: 2
First Page: 103
Abstract: We present a spectral and timing study of the NuSTAR and Swift observations of the black hole candidate IGR J17091-3624 in the hard state during its outburst in 2016. Disk reflection is detected in each of the NuSTAR spectra taken in three epochs. Fitting with relativistic reflection models reveals that the accretion disk is truncated during all epochs with {R}<SUB>{in</SUB>}> 10 {r}<SUB>{{g</SUB>}}, with the data favoring a low disk inclination of ∼30°-40°. The steepening of the continuum spectra between epochs is accompanied by a decrease in the high energy cutoff: the electron temperature {{kT}}<SUB>{{e</SUB>}} drops from ∼64 to ∼26 keV, changing systematically with the source flux. We detect type-C QPOs in the power spectra with frequency varying between 0.131 and 0.327 Hz. In addition, a secondary peak is found in the power spectra centered at about 2.3 times the QPO frequency during all three epochs. The nature of this secondary frequency is uncertain; however, a non-harmonic origin is favored. We investigate the evolution of the timing and spectral properties during the rising phase of the outburst and discuss their physical implications.
URI: http://hdl.handle.net/20.500.12386/26638
URL: https://iopscience.iop.org/article/10.3847/1538-4357/aa9ab4
ISSN: 0004-637X
DOI: 10.3847/1538-4357/aa9ab4
Bibcode ADS: 2017ApJ...851..103X
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat 
Xu_2017_ApJ_851_103.pdfPdf editoriale1.1 MBAdobe PDFView/Open
Show full item record

Page view(s)

16
checked on Jan 28, 2021

Download(s)

3
checked on Jan 28, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE