A Wildly Flickering Jet in the Black Hole X-Ray Binary MAXI J1535-571

作者：Baglio, Maria Cristina^*; Russell, David M.; Casella, Piergiorgio; Al Noori, Hind; Al Yazeedi, Aisha; Belloni, Tomaso; Buckley, David A. H.; Bel, Marion Cadolle; Ceccobello, Chiara; Corbel, Stephane; Zelati, Francesco Coti; Trigo, Maria Diaz; Fender, Rob P.; Gallo, Elena; Gandhi, Poshak; Homan, Jeroen; Koljonen, Karri I. I.; Lewis, Fraser; Maccarone, Thomas J.; Malzac, Julien; Markoff, Sera; Miller-Jones, James C. A.; O'Brien, Kieran; Russell, Thomas D.; Saikia, Payaswini

来源：Astrophysical Journal, 2018, 867(2): 114.

DOI：10.3847/1538-4357/aae532

• accretion, accretion disks
• black hole physics
• ISM: jets and outflows
• X-rays: binaries

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 greater than or similar to 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 similar to 15%-22%, which is similar to that expected from the internal shock jet model, and much higher than the optical fractional rms (less than or similar to 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.

• 出版日期2018-11-10
• 单位中国科学院大学; SAP; 中国地震局