Asset Details
Do you wish to reserve the book?
Cosmic hide and seek: the volumetric rate of X-ray quasi-periodic eruptions
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Cosmic hide and seek: the volumetric rate of X-ray quasi-periodic eruptions
Do you wish to request the book?
Cosmic hide and seek: the volumetric rate of X-ray quasi-periodic eruptions
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Paper
Cosmic hide and seek: the volumetric rate of X-ray quasi-periodic eruptions
2024
Overview
Multi-wavelength extragalactic nuclear transients, particularly those detectable as multi-messengers, are among the primary drivers for the next-generation observatories. X-ray quasi-periodic eruptions (QPEs) are the most recent and perhaps most peculiar addition to this group. Here, we report a first estimate of the volumetric rate of QPEs based on the first four discoveries with the eROSITA X-ray telescope onboard the Spectrum Roentgen Gamma observatory. Under the assumption, supported by a suite of simulated light curves, that these four sources sample the intrinsic population somewhat homogeneously, we correct for their detection efficiency and compute a QPE abundance of \\(\\mathscr{R}_{{\\rm vol}} = 0.60_{-0.43}^{+4.73} \\times 10^{-6}\\,\\)Mpc\\(^{-3}\\) above an intrinsic average \\(\\log L_{\\rm 0.5-2.0\\,keV}^{\\rm peak} > 41.7\\). Since the exact lifetime of QPEs (\\(\\tau_{\\rm life}\\)) is currently not better defined than between a few years or few decades, we convert this to a formation rate of \\(\\mathscr{R}_{\\rm vol}/\\tau_{\\rm life}\\approx 0.6 \\times 10^{-7} (\\tau_{\\rm life}/10\\,\\mathrm{y})^{-1}\\,\\)Mpc\\(^{-3}\\,\\)year\\(^{-1}\\). As a comparison, this value is a factor \\(\\sim10\\,\\tau_{\\rm life}\\) times smaller than the formation rate of tidal disruption events. The origin of QPEs is still debated, although lately most models suggest that they are the electromagnetic counterpart of extreme mass ratio inspirals (EMRIs). In this scenario, the QPE rate would thus be the first-ever constraint (i.e. a lower limit) to the EMRI rate from observations alone. Future discoveries of QPEs and advances in their theoretical modeling will consolidate or rule out their use for constraining the number of EMRIs detectable by the LISA mission.
Publisher
Cornell University Library, arXiv.org
Subject
