8 papers
X-ray Searches for Axions from Super Star Clusters
Christopher Dessert, Joshua W. Foster, Benjamin R. Safdi
Axions may be produced in abundance inside stellar cores and then convert into observable X-rays in the Galactic magnetic fields. We focus on the Quintuplet and Westerlund 1 super…
Systematics in the XENON1T data: the 15-keV anti-axion
Christopher Dessert, Joshua W. Foster, Yonatan Kahn +1
The XENON1T collaboration has found an excess of electron recoil events in their Science Run 1 data below ~7 keV with a spectral shape consistent with that expected from a solar-ax…
Technical comment on the paper of Dessert et al. "The dark matter interpretation of the 3.5 keV line is inconsistent with blank-sky observations"
Alexey Boyarsky, Denys Malyshev, Oleg Ruchayskiy +1
An unidentified line at energy around 3.5 keV was detected in the spectra of dark matter-dominated objects. Recent work of Dessert et al. [1812.06976] used 30 Msec of XMM-Newton bl…
Axion Emission Can Explain a New Hard -ray Excess from Nearby Isolated Neutron Stars
Malte Buschmann, Raymond T. Co, Christopher Dessert +1
Axions may be produced thermally inside the cores of neutron stars (NSs), escape the stars due to their feeble interactions with matter, and subsequently convert into X-rays in the…
Hard X-ray Excess from the Magnificent Seven Neutron Stars
Christopher Dessert, Joshua W. Foster, Benjamin R. Safdi
We report significant hard X-ray excesses in the energy range 2-8 keV for two nearby isolated neutron stars RX J1856.6-3754 and RX J0420.0-5022. These neutron stars have previously…
X-ray Signatures of Axion Conversion in Magnetic White Dwarf Stars
Christopher Dessert, Andrew J. Long, Benjamin R. Safdi
White dwarf (WD) stars may radiate keV-energy axions produced in their stellar cores. This has been extensively studied as an extra channel by which WDs may cool, with some analyse…