AGN STORM 2. II. Ultraviolet Observations of Mrk 817 with the Cosmic Origins Spectrograph on the Hubble Space Telescope

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00573378" target="_blank" >RIV/67985815:_____/23:00573378 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0343842" target="_blank" >https://hdl.handle.net/11104/0343842</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/acc45a" target="_blank" >10.3847/1538-4357/acc45a</a>

Result language

angličtina

Original language name

AGN STORM 2. II. Ultraviolet Observations of Mrk 817 with the Cosmic Origins Spectrograph on the Hubble Space Telescope

Original language description

We present reverberation mapping measurements for the prominent ultraviolet broad emission lines of the activengalactic nucleus Mrk 817 using 165 spectra obtained with the Cosmic Origins Spectrograph on the Hubble SpacenTelescope. Our ultraviolet observations are accompanied by X-ray, optical, and near-infrared observations as partnof the AGN Space Telescope and Optical Reverberation Mapping Program 2 (AGN STORM 2). Using the cross-ncorrelation lag analysis method, we find significant correlated variations in the continuum and emission-line lightncurves. We find that the emission-line responses to continuum variations are more complex than a simple smoothed, shifted, and scaled version of the continuum light curve. We also measure velocity-resolved lags for the Lyα and C IV emission lines.nThe lag profile in the blue wing of Lyα is consistent with virial motion, with longer lags dominating at lowernvelocities, and shorter lags at higher velocities. The C IV lag profile shows the signature of a thick rotating disk,nwith the shortest lags in the wings, local peaks at ±1500 km s−1 , and a local minimum at the line center. The othernemission lines are dominated by broad absorption lines and blending with adjacent emission lines. These requirendetailed models, and will be presented in future work.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Volume of the periodical

948

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

18

Pages from-to

85

UT code for WoS article

000993590900001

EID of the result in the Scopus database

2-s2.0-85159191492