NuSTAR Detection of X-rays Concurrent with Gamma Rays in the Nova V5855 Sgr
| dc.contributor.author | Nelson, Thomas | |
| dc.contributor.author | Mukai, Koji | |
| dc.contributor.author | Li, Kwan-Lok | |
| dc.contributor.author | Vurm, Indrek | |
| dc.contributor.author | Metzger, Brian D. | |
| dc.contributor.author | Chomiuk, Laura | |
| dc.contributor.author | Sokoloski, J.L. | |
| dc.contributor.author | Linford, Justin D. | |
| dc.contributor.author | Bohlsen, Terry | |
| dc.contributor.author | Luckas, Paul | |
| dc.date.accessioned | 2019-02-14T16:52:18Z | |
| dc.date.available | 2019-02-14T16:52:18Z | |
| dc.date.issued | 2018-12-31 | |
| dc.description.abstract | We report the first detection of hard (>10 keV) X-ray emission simultaneous with gamma rays in a nova eruption. Observations of the nova V5855 Sgr carried out with the NuSTAR satellite on Day 12 of the eruption revealed faint, highly absorbed thermal X-rays. The extreme equivalent hydrogen column density towards the X-ray emitting region (~3 x 10²⁴ cm ⁻² ) indicates that the shock producing the X-rays was deeply embedded within the nova ejecta. The slope of the X-ray spectrum favors a thermal origin for the bulk of the emission, and the constraints of the temperature in the shocked region suggest a shock velocity compatible with the ejecta velocities inferred from optical spectroscopy. While we do not claim the detection of non-thermal X-rays, the data do not allow us to rule out an additional, fainter component dominating at energy above 20 keV, for which we obtained upper limits. The inferred luminosity of the thermal X-rays is too low to be consistent with the gamma-ray luminosities if both are powered by the same shock under standard assumptions regarding the efficiency of non-thermal particle acceleration and the temperature distribution of the shocked gas. | en_US |
| dc.description.sponsorship | TN acknowledges support from the NASA NuSTAR Guest Investigator programthrough grant NNX17AC43G. BDM is supported through the NSF grant AST- 1615084, NASA Fermi Guest Investigator Program grants NNX16AR73G and 80NSSC17K0501; and through Hubble Space Telescope Guest Investigator Program grant HST-AR-15041.001-A. LC is a Cottrell Scholar of the Research Corporation, and acknowledges support from NSF grant AST-1751874 and NASA Fermi Guest Investigator grant NNX14AQ36G. JLS was sup- ported by HST-GO-13715 and Award #2017-246 from the Heising-Simons Foundation. | en_US |
| dc.description.uri | https://arxiv.org/abs/1901.00030 | en_US |
| dc.format.extent | 10 pages | en_US |
| dc.genre | journal articles preprints | en_US |
| dc.identifier | doi:10.13016/m2ouel-8pqa | |
| dc.identifier.citation | Thomas Nelson, Koji Mukai, Kwan-Lok Li, Indrek Vurm, Brian D. Metzger, Laura Chomiuk, J.L. Sokoloski, Justin D. Linford, Terry Bohlsen, Paul Luckas , NuSTAR Detection of X-rays Concurrent with Gamma Rays in the Nova V5855 Sgr, NuSTAR Detection of X-rays Concurrent with Gamma Rays in the Nova V5855 Sgr, 2018, https://arxiv.org/abs/1901.00030 | en_US |
| dc.identifier.uri | http://hdl.handle.net/11603/12792 | |
| dc.language.iso | en_US | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology (CSST) | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.subject | novae | en_US |
| dc.subject | cataclysmic variables | en_US |
| dc.subject | stars: individual (V5855 Sgr) | en_US |
| dc.subject | X-rays: binaries | en_US |
| dc.title | NuSTAR Detection of X-rays Concurrent with Gamma Rays in the Nova V5855 Sgr | en_US |
| dc.type | Text | en_US |