The Changing-look Optical Wind of the Flaring X-Ray Transient Swift J1858.6-0814

We present the discovery of an optical accretion disk wind in the X-ray transient Swift J1858.6-0814. Our 90-spectrum data set, taken with the 10.4 m Gran Telescopio Canarias telescope over eight different epochs and across five months, reveals the presence of conspicuous P-Cyg profiles in He i at 5...

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Autores principales: Muñoz Darias, T., Armas Padilla, M., Jiménez Ibarra, F., Panizo Espinar, G., Casares, Jorge, Altamirano, Diego, Buisson, Douglas, Castro Segura, N., Cúneo, V. A., Degenaar, Nathalie, Fogantini, Federico Adrián, Knigge, Christian, Sánchez, D. Mata, Ozbey Arabaci, M., Sánchez-Sierras, J., Torres, Manuel A. P., van den Eijnden, J., Vincentelli, F. M.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2020
Materias:
Astronomía
Neutron stars
X-ray binary stars;
Stellar winds;
Stellar accretion disks
Stellar mass black holes
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/129648
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-129648
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Astronomía
Neutron stars
X-ray binary stars;
Stellar winds;
Stellar accretion disks
Stellar mass black holes
spellingShingle Astronomía
Neutron stars
X-ray binary stars;
Stellar winds;
Stellar accretion disks
Stellar mass black holes
Muñoz Darias, T.
Armas Padilla, M.
Jiménez Ibarra, F.
Panizo Espinar, G.
Casares, Jorge
Altamirano, Diego
Buisson, Douglas
Castro Segura, N.
Cúneo, V. A.
Degenaar, Nathalie
Fogantini, Federico Adrián
Knigge, Christian
Sánchez, D. Mata
Ozbey Arabaci, M.
Sánchez-Sierras, J.
Torres, Manuel A. P.
van den Eijnden, J.
Vincentelli, F. M.
The Changing-look Optical Wind of the Flaring X-Ray Transient Swift J1858.6-0814
topic_facet Astronomía
Neutron stars
X-ray binary stars;
Stellar winds;
Stellar accretion disks
Stellar mass black holes
description We present the discovery of an optical accretion disk wind in the X-ray transient Swift J1858.6-0814. Our 90-spectrum data set, taken with the 10.4 m Gran Telescopio Canarias telescope over eight different epochs and across five months, reveals the presence of conspicuous P-Cyg profiles in He i at 5876 A and Hα. These features are detected throughout the entire campaign, albeit their intensity and main observational properties are observed to vary on timescales as short as 5 minutes. In particular, we observe significant variations in the wind velocity, between a few hundreds and ∼2400 km s; -1. In agreement with previous reports, our observations are characterized by the presence of frequent flares, although the relation between the continuum flux variability and the presence/absence of wind features is not evident. The reported high activity of the system at radio waves indicates that the optical wind of Swift J1858.6-0814 is contemporaneous with the radio jet, as is the case for the handful of X-ray binary transients that have shown so far optical P-Cyg profiles. Finally, we compare our results with those of other sources showing optical accretion disk winds, with emphasis on V404 Cyg and V4641 Sgr, since they also display strong and variable optical wind features as well as similar flaring behavior.
format Articulo
Preprint
author Muñoz Darias, T.
Armas Padilla, M.
Jiménez Ibarra, F.
Panizo Espinar, G.
Casares, Jorge
Altamirano, Diego
Buisson, Douglas
Castro Segura, N.
Cúneo, V. A.
Degenaar, Nathalie
Fogantini, Federico Adrián
Knigge, Christian
Sánchez, D. Mata
Ozbey Arabaci, M.
Sánchez-Sierras, J.
Torres, Manuel A. P.
van den Eijnden, J.
Vincentelli, F. M.
author_facet Muñoz Darias, T.
Armas Padilla, M.
Jiménez Ibarra, F.
Panizo Espinar, G.
Casares, Jorge
Altamirano, Diego
Buisson, Douglas
Castro Segura, N.
Cúneo, V. A.
Degenaar, Nathalie
Fogantini, Federico Adrián
Knigge, Christian
Sánchez, D. Mata
Ozbey Arabaci, M.
Sánchez-Sierras, J.
Torres, Manuel A. P.
van den Eijnden, J.
Vincentelli, F. M.
author_sort Muñoz Darias, T.
title The Changing-look Optical Wind of the Flaring X-Ray Transient Swift J1858.6-0814
title_short The Changing-look Optical Wind of the Flaring X-Ray Transient Swift J1858.6-0814
title_full The Changing-look Optical Wind of the Flaring X-Ray Transient Swift J1858.6-0814
title_fullStr The Changing-look Optical Wind of the Flaring X-Ray Transient Swift J1858.6-0814
title_full_unstemmed The Changing-look Optical Wind of the Flaring X-Ray Transient Swift J1858.6-0814
title_sort changing-look optical wind of the flaring x-ray transient swift j1858.6-0814
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/129648
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