A Caltech Library Service

Public Release of RELXILL_NK: A Relativistic Reflection Model for Testing Einstein’s Gravity

Abdikamalov, Askar B. and Ayzenberg, Dimitry and Bambi, Cosimo and Dauser, Thomas and García, Javier A. and Nampalliwar, Sourabh (2019) Public Release of RELXILL_NK: A Relativistic Reflection Model for Testing Einstein’s Gravity. Astrophysical Journal, 878 (2). Art. No. 91. ISSN 1538-4357.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


We present the public release version of relxill_nk, an X-ray reflection model for testing the Kerr hypothesis and general relativity. This model extends the relxill model that assumes the black hole (BH) spacetime is described by the Kerr metric. We also present relxilllp_nk, the first non-Kerr X-ray reflection model with a lamppost corona configuration, as well as all other models available in the full relxill_nk package. In all models the relevant relativistic effects are calculated through a general relativistic ray-tracing code that can be applied to any well-behaved, stationary, axisymmetric, and asymptotically flat BH spacetime. We show that the numerical error introduced by using a ray-tracing code is not significant compared with the observational error present in current X-ray reflection spectrum observations. In addition, we present the reflection spectrum for the Johannsen metric as calculated by relxill_nk.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Bambi, Cosimo0000-0002-3180-9502
Dauser, Thomas0000-0003-4583-9048
García, Javier A.0000-0003-3828-2448
Additional Information:© 2019 The American Astronomical Society. Received 2019 February 28; revised 2019 May 1; accepted 2019 May 5; published 2019 June 18. We thank Alejandro Cardenas-Avendano for earlier collaboration on the subject of this paper. This work was supported by the Innovation Program of the Shanghai Municipal Education Commission, grant No. 2019-01-07-00-07-E00035, the National Natural Science Foundation of China (NSFC), grant No. U1531117, and Fudan University, grant No. IDH1512060. A.B.A. also acknowledges the support from the Shanghai Government Scholarship (SGS). J.A.G. acknowledges support from the Alexander von Humboldt Foundation. S.N. acknowledges support from the Excellence Initiative at Eberhard-Karls Universität Tübingen.
Funding AgencyGrant Number
Shanghai Municipal Education Commission2019-01-07-00-07-E00035
National Natural Science Foundation of ChinaU1531117
Fudan UniversityIDH1512060
Shanghai Government ScholarshipUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Eberhard-Karls Universität TübingenUNSPECIFIED
Subject Keywords:accretion, accretion disks – black hole physics – gravitation
Issue or Number:2
Record Number:CaltechAUTHORS:20190618-104022523
Persistent URL:
Official Citation:Askar B. Abdikamalov et al 2019 ApJ 878 91
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96499
Deposited By: Tony Diaz
Deposited On:18 Jun 2019 19:35
Last Modified:03 Oct 2019 21:22

Repository Staff Only: item control page