The black hole X-ray binary MAXI J1348–630 in quiescence
The properties of the disk/jet coupling in quiescent black hole low mass X-ray binaries (BH LMXBs) are still largely unknown. In this paper we present the first quasi-simultaneous radio and X-ray detection in quiescence of the BH LMXB MAXI J1348–630, which is known to display a hybrid disk/jet conne...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Oxford University Press
2022
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| Summary: | The properties of the disk/jet coupling in quiescent black hole low mass X-ray binaries (BH LMXBs) are still largely unknown. In
this paper we present the first quasi-simultaneous radio and X-ray detection in quiescence of the BH LMXB MAXI J1348–630,
which is known to display a hybrid disk/jet connection that depends on the accretion rate. We performed deep X-ray and radio
observations using the Chandra X-ray Observatory and the Australia Telescope Compact Array. MAXI J1348–630 is detected
for the first time in quiescence at an X-ray luminosity LX = (7.5 ± 2.9) × 1030(D/2.2 kpc)2
erg s−1
: one of the lowest X-ray
luminosities observed for a quiescent BH LMXB, possibly implying a short orbital period for the system. MAXI J1348–630 is
also detected in radio at LR = (4.3 ± 0.9) × 1026(D/2.2 kpc)2
erg s−1
. These detections allow us to constrain the location of
MAXI J1348–630 on the radio/X-ray diagram in quiescence, finding that the source belongs to the standard (radio-loud) track
in this phase. This provides a strong confirmation that hybrid-correlation sources follow the standard track at low luminosities
and down to quiescence, thus improving our knowledge of the disk/jet connection in BH LMXBs. |
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