TY - JOUR
T1 - A Wildly Flickering Jet in the Black Hole X-Ray Binary MAXI J1535-571
AU - Cristina Baglio, Maria
AU - Russell, David M.
AU - Casella, Piergiorgio
AU - Al Noori, Hind
AU - Al Yazeedi, Aisha
AU - Belloni, Tomaso
AU - Buckley, David A.H.
AU - Cadolle Bel, Marion
AU - Ceccobello, Chiara
AU - Corbel, Stephane
AU - Coti Zelati, Francesco
AU - Díaz Trigo, Maria
AU - Fender, Rob P.
AU - Gallo, Elena
AU - Gandhi, Poshak
AU - Homan, Jeroen
AU - Koljonen, Karri I.I.
AU - Lewis, Fraser
AU - Maccarone, Thomas J.
AU - Malzac, Julien
AU - Markoff, Sera
AU - Miller-Jones, James C.A.
AU - O'Brien, Kieran
AU - Russell, Thomas D.
AU - Saikia, Payaswini
AU - Shahbaz, Tariq
AU - Sivakoff, Greg R.
AU - Soria, Roberto
AU - Testa, Vincenzo
AU - Tetarenko, Alexandra J.
AU - Van Den Ancker, Mario E.
AU - Vincentelli, Federico M.
N1 - Funding Information:
IRAF is distributed by the National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation.
Funding Information:
D.M.R. acknowledges the support of the NYU Abu Dhabi Research Enhancement Fund under grant RE124. T.M.B. acknowledges the financial contribution from the agreement ASI-INAF n.2017-14-H.O. A.J.T. is supported by a Natural Sciences and Engineering Research Council of Canada (NSERC) Post-Graduate Doctoral Scholarship (PGSD2-490318-2016). T.D.R. acknowledges support from the Netherlands Organisation for Scientific Research (NWO) Veni Fellowship, grant 639.041.646. J.C.A.M.-J. is the recipient of an Australian Research Council Future Fellowship (FT140101082). The research reported in this publication was supported by the Mohammed Bin Rashid Space Centre (MBRSC), Dubai, UAE, under grant ID 201701.SS. NYUAD. The Faulkes Telescope Project is an education partner of Las Cumbres Observatory. The Faulkes Telescopes are maintained and operated by LCO. This research has made use of the VizieR catalog access tool, CDS, Strasbourg, France. The original description of the VizieR service was published in Ochsenbein et al. (2000). F.C.Z. is supported by grant AYA2015-71042-P. S.C. acknowledges financial support from the UnivEarthS Labex program of Sorbonne Paris Cite (ANR-10-LABX-0023 and ANR-11-IDEX-0005-02). J.M. acknowledges support from PNHE, the OCEVU Labex (ANR-11-LABX-0060), and the A*MIDEX project (ANR-11-IDEX-0001-02) funded by the “Investissements dAvenir” French government program managed by the ANR. G.R.S. and A.J.T. acknowledge funding from NSERC Discovery Grants. This work profited from discussions carried out during a meeting organized at the International Space Science Institute (ISSI) Beijing by T. Belloni and D. Bhattacharya. The SALT observations were obtained as part of the SALT Large Science Program on transients, 2016-2-LSP-001, which is in part supported by Polish participation in SALT funded by grant No. MNiSW DIR/WK/2016/07. D.B. acknowledges support from the National Research Foundation. This work is based on observations collected at the European Southern Observatory under ESO program ID 099.D-0884(A).
Publisher Copyright:
© 2018. The American Astronomical Society. All rights reserved.
PY - 2018/11/10
Y1 - 2018/11/10
N2 - We report on the results of optical, near-infrared (NIR), and mid-infrared observations of the black hole X-ray binary candidate (BHB) MAXI J1535-571 during its 2017/2018 outburst. During the first part of the outburst (MJD 58004-58012), the source shows an optical-NIR spectrum that is consistent with an optically thin synchrotron power law from a jet. After MJD 58015, however, the source faded considerably, the drop in flux being much more evident at lower frequencies. Before the fading, we measure a dereddened flux density of 100 mJy in the mid-infrared, making MAXI J1535-571 one of the brightest mid-infrared BHBs known so far. A significant softening of the X-ray spectrum is evident contemporaneous with the infrared fade. We interpret it as being due to the suppression of the jet emission, similar to the accretion-ejection coupling seen in other BHBs. However, MAXI J1535-571 did not transition smoothly to the soft state, instead showing X-ray hardness deviations associated with infrared flaring. We also present the first mid-IR variability study of a BHB on minute timescales, with a fractional rms variability of the light curves of ∼15%-22%, which is similar to that expected from the internal shock jet model, and much higher than the optical fractional rms (≲7%). These results represent an excellent case of multiwavelength jet spectral timing and demonstrate how rich, multiwavelength time-resolved data of X-ray binaries over accretion state transitions can help in refining models of the disk-jet connection and jet launching in these systems.
AB - We report on the results of optical, near-infrared (NIR), and mid-infrared observations of the black hole X-ray binary candidate (BHB) MAXI J1535-571 during its 2017/2018 outburst. During the first part of the outburst (MJD 58004-58012), the source shows an optical-NIR spectrum that is consistent with an optically thin synchrotron power law from a jet. After MJD 58015, however, the source faded considerably, the drop in flux being much more evident at lower frequencies. Before the fading, we measure a dereddened flux density of 100 mJy in the mid-infrared, making MAXI J1535-571 one of the brightest mid-infrared BHBs known so far. A significant softening of the X-ray spectrum is evident contemporaneous with the infrared fade. We interpret it as being due to the suppression of the jet emission, similar to the accretion-ejection coupling seen in other BHBs. However, MAXI J1535-571 did not transition smoothly to the soft state, instead showing X-ray hardness deviations associated with infrared flaring. We also present the first mid-IR variability study of a BHB on minute timescales, with a fractional rms variability of the light curves of ∼15%-22%, which is similar to that expected from the internal shock jet model, and much higher than the optical fractional rms (≲7%). These results represent an excellent case of multiwavelength jet spectral timing and demonstrate how rich, multiwavelength time-resolved data of X-ray binaries over accretion state transitions can help in refining models of the disk-jet connection and jet launching in these systems.
KW - ISM: jets and outflows
KW - X-rays: binaries
KW - accretion, accretion disks
KW - black hole physics
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U2 - 10.3847/1538-4357/aae532
DO - 10.3847/1538-4357/aae532
M3 - Article
AN - SCOPUS:85056731216
SN - 0004-637X
VL - 867
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 114
ER -