Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783

Junjie Mao, M. Mehdipour, J. S. Kaastra, E. Costantini, C. Pinto, G. Branduardi-Raymont, E. Behar, U. Peretz, S. Bianchi, G. A. Kriss, G. Ponti, B. De Marco, P. -O. Petrucci, L. Di Gesu, R. Middei, J. Ebrero, N. Arav

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Our Swift monitoring program triggered two joint XMM-Newton, NuSTAR, and HST observations on 11 and 21 December 2016 targeting NGC 3783 because its soft X-ray continuum was heavily obscured. Consequently, emission features, including the O VII radiative recombination continuum, stand out above the diminished continuum. We focus on the photoionized emission features in the December 2016 Reflection Grating Spectrometer (RGS) spectra, and compare them to the time-averaged RGS spectrum obtained in 2000-2001 when the continuum was unobscured. A two-phase photoionized plasma is required to account for the narrow emission features. These narrow emission features are weakly varying between 2000-2001 and December 2016. We also find a statistically significant broad emission component in the time-averaged RGS spectrum in 2000-2001. This broad emission component is significantly weaker in December 2016, suggesting that the obscurer is farther away than the X-ray broad-line region. In addition, by analyzing the archival high-resolution X-ray spectra, we find that nine photoionized absorption components with different ionization parameters and kinematics are required for the warm absorber in X-rays.

LanguageEnglish
Article numberA99
Number of pages15
JournalAstronomy and Astrophysics
Volume621
Issue numberA99
DOIs
Publication statusPublished - 15 Jan 2019

Fingerprint

high resolution
continuums
x rays
spectrometer
gratings
spectrometers
radiative recombination
XMM-Newton telescope
newton
recombination
targeting
absorbers
ionization
kinematics
plasma
monitoring

Keywords

  • X-rays: galaxies
  • galaxies: active
  • galaxies: Seyfert
  • galaxies: individual: NGC 3783
  • techniques: spectroscopic

Cite this

Mao, J., Mehdipour, M., Kaastra, J. S., Costantini, E., Pinto, C., Branduardi-Raymont, G., ... Arav, N. (2019). Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783. Astronomy and Astrophysics, 621(A99), [A99]. https://doi.org/10.1051/0004-6361/201833191
Mao, Junjie ; Mehdipour, M. ; Kaastra, J. S. ; Costantini, E. ; Pinto, C. ; Branduardi-Raymont, G. ; Behar, E. ; Peretz, U. ; Bianchi, S. ; Kriss, G. A. ; Ponti, G. ; Marco, B. De ; Petrucci, P. -O. ; Gesu, L. Di ; Middei, R. ; Ebrero, J. ; Arav, N. / Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783. In: Astronomy and Astrophysics. 2019 ; Vol. 621, No. A99.
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abstract = "Our Swift monitoring program triggered two joint XMM-Newton, NuSTAR, and HST observations on 11 and 21 December 2016 targeting NGC 3783 because its soft X-ray continuum was heavily obscured. Consequently, emission features, including the O VII radiative recombination continuum, stand out above the diminished continuum. We focus on the photoionized emission features in the December 2016 Reflection Grating Spectrometer (RGS) spectra, and compare them to the time-averaged RGS spectrum obtained in 2000-2001 when the continuum was unobscured. A two-phase photoionized plasma is required to account for the narrow emission features. These narrow emission features are weakly varying between 2000-2001 and December 2016. We also find a statistically significant broad emission component in the time-averaged RGS spectrum in 2000-2001. This broad emission component is significantly weaker in December 2016, suggesting that the obscurer is farther away than the X-ray broad-line region. In addition, by analyzing the archival high-resolution X-ray spectra, we find that nine photoionized absorption components with different ionization parameters and kinematics are required for the warm absorber in X-rays.",
keywords = "X-rays: galaxies, galaxies: active, galaxies: Seyfert, galaxies: individual: NGC 3783, techniques: spectroscopic",
author = "Junjie Mao and M. Mehdipour and Kaastra, {J. S.} and E. Costantini and C. Pinto and G. Branduardi-Raymont and E. Behar and U. Peretz and S. Bianchi and Kriss, {G. A.} and G. Ponti and Marco, {B. De} and Petrucci, {P. -O.} and Gesu, {L. Di} and R. Middei and J. Ebrero and N. Arav",
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Mao, J, Mehdipour, M, Kaastra, JS, Costantini, E, Pinto, C, Branduardi-Raymont, G, Behar, E, Peretz, U, Bianchi, S, Kriss, GA, Ponti, G, Marco, BD, Petrucci, P-O, Gesu, LD, Middei, R, Ebrero, J & Arav, N 2019, 'Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783' Astronomy and Astrophysics, vol. 621, no. A99, A99. https://doi.org/10.1051/0004-6361/201833191

Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783. / Mao, Junjie; Mehdipour, M.; Kaastra, J. S.; Costantini, E.; Pinto, C.; Branduardi-Raymont, G.; Behar, E.; Peretz, U.; Bianchi, S.; Kriss, G. A.; Ponti, G.; Marco, B. De; Petrucci, P. -O.; Gesu, L. Di; Middei, R.; Ebrero, J.; Arav, N.

In: Astronomy and Astrophysics, Vol. 621, No. A99, A99, 15.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Photoionized emission and absorption features in the high-resolution X-ray spectra of NGC 3783

AU - Mao, Junjie

AU - Mehdipour, M.

AU - Kaastra, J. S.

AU - Costantini, E.

AU - Pinto, C.

AU - Branduardi-Raymont, G.

AU - Behar, E.

AU - Peretz, U.

AU - Bianchi, S.

AU - Kriss, G. A.

AU - Ponti, G.

AU - Marco, B. De

AU - Petrucci, P. -O.

AU - Gesu, L. Di

AU - Middei, R.

AU - Ebrero, J.

AU - Arav, N.

PY - 2019/1/15

Y1 - 2019/1/15

N2 - Our Swift monitoring program triggered two joint XMM-Newton, NuSTAR, and HST observations on 11 and 21 December 2016 targeting NGC 3783 because its soft X-ray continuum was heavily obscured. Consequently, emission features, including the O VII radiative recombination continuum, stand out above the diminished continuum. We focus on the photoionized emission features in the December 2016 Reflection Grating Spectrometer (RGS) spectra, and compare them to the time-averaged RGS spectrum obtained in 2000-2001 when the continuum was unobscured. A two-phase photoionized plasma is required to account for the narrow emission features. These narrow emission features are weakly varying between 2000-2001 and December 2016. We also find a statistically significant broad emission component in the time-averaged RGS spectrum in 2000-2001. This broad emission component is significantly weaker in December 2016, suggesting that the obscurer is farther away than the X-ray broad-line region. In addition, by analyzing the archival high-resolution X-ray spectra, we find that nine photoionized absorption components with different ionization parameters and kinematics are required for the warm absorber in X-rays.

AB - Our Swift monitoring program triggered two joint XMM-Newton, NuSTAR, and HST observations on 11 and 21 December 2016 targeting NGC 3783 because its soft X-ray continuum was heavily obscured. Consequently, emission features, including the O VII radiative recombination continuum, stand out above the diminished continuum. We focus on the photoionized emission features in the December 2016 Reflection Grating Spectrometer (RGS) spectra, and compare them to the time-averaged RGS spectrum obtained in 2000-2001 when the continuum was unobscured. A two-phase photoionized plasma is required to account for the narrow emission features. These narrow emission features are weakly varying between 2000-2001 and December 2016. We also find a statistically significant broad emission component in the time-averaged RGS spectrum in 2000-2001. This broad emission component is significantly weaker in December 2016, suggesting that the obscurer is farther away than the X-ray broad-line region. In addition, by analyzing the archival high-resolution X-ray spectra, we find that nine photoionized absorption components with different ionization parameters and kinematics are required for the warm absorber in X-rays.

KW - X-rays: galaxies

KW - galaxies: active

KW - galaxies: Seyfert

KW - galaxies: individual: NGC 3783

KW - techniques: spectroscopic

UR - https://arxiv.org/abs/1811.11579

UR - https://www.aanda.org/

U2 - 10.1051/0004-6361/201833191

DO - 10.1051/0004-6361/201833191

M3 - Article

VL - 621

JO - Astronomy and Astrophysics

T2 - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - A99

M1 - A99

ER -