{"679917":{"#nid":"679917","#data":{"type":"event","title":"School of Physics CRA Seminar - Dr. Tolga Guver","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ESpeaker:\u0026nbsp;\u003C\/strong\u003EDr. Tolga Guver\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EHost: \u003C\/strong\u003EDr. Matthew Liska\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ETitle:\u003C\/strong\u003ETitle: Thermonuclear X-ray Bursts in the NICER Era\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EThermonuclear X-ray bursts are sudden flashes observed from some low-mass X-ray binaries. Time-resolved spectral analysis and long-term observations have revealed that they occur due to the unstable thermonuclear burning of the accreted matter on the surface of the neutron star. They typically last a few tens of seconds, and the recurrence of these events seems to track the amount of matter accreted. Observations of thermonuclear X-ray bursts provide a wealth of information about thermonuclear burning, accretion physics, and the properties of the host systems, while also playing a crucial role in measurements of neutron star masses and radii. In this talk, I will focus on X-ray burst observations with the Neutron Star Interior Composition Explorer (NICER) since its launch in 2017. With its large effective area in the soft X-ray band, NICER has allowed us to probe the interaction of X-ray bursts with their surroundings in a systematic way for the first time. I will summarize our findings on the excess soft X-ray emission observed during the bursts and how it can be interpreted in terms of changes in the mass accretion rate during the bursts and\/or the reflection of the X-ray burst emission off the accretion disk.\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EAbstract:\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EThermonuclear X-ray bursts are sudden flashes observed from some low-mass X-ray binaries. Time-resolved spectral analysis and long-term observations have revealed that they occur due to the unstable thermonuclear burning of the accreted matter on the surface of the neutron star. They typically last a few tens of seconds, and the recurrence of these events seems to track the amount of matter accreted. Observations of thermonuclear X-ray bursts provide a wealth of information about thermonuclear burning, accretion physics, and the properties of the host systems, while also playing a crucial role in measurements of neutron star masses and radii. In this talk, I will focus on X-ray burst observations with the Neutron Star Interior Composition Explorer (NICER) since its launch in 2017. With its large effective area in the soft X-ray band, NICER has allowed us to probe the interaction of X-ray bursts with their surroundings in a systematic way for the first time. I will summarize our findings on the excess soft X-ray emission observed during the bursts and how it can be interpreted in terms of changes in the mass accretion rate during the bursts and\/or the reflection of the X-ray burst emission off the accretion disk.\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"CRA Seminar | Dr. Tolga Guver | Istanbul University, Turkey | Host: Dr. Matthew Liska"}],"uid":"30957","created_gmt":"2025-01-24 01:43:19","changed_gmt":"2025-02-04 20:36:19","author":"Shaun Ashley","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2025-02-13T15:30:00-05:00","event_time_end":"2025-02-13T16:30:00-05:00","event_time_end_last":"2025-02-13T16:30:00-05:00","gmt_time_start":"2025-02-13 20:30:00","gmt_time_end":"2025-02-13 21:30:00","gmt_time_end_last":"2025-02-13 21:30:00","rrule":null,"timezone":"America\/New_York"},"location":"Gilbert Boggs Building Rm B1-44","extras":[],"hg_media":{"676117":{"id":"676117","type":"image","title":"Tolga Guver ","body":null,"created":"1737683014","gmt_created":"2025-01-24 01:43:34","changed":"1737683014","gmt_changed":"2025-01-24 01:43:34","alt":"Tolga Guver ","file":{"fid":"259839","name":"Picture1.png","image_path":"\/sites\/default\/files\/2025\/01\/23\/Picture1.png","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/2025\/01\/23\/Picture1.png","mime":"image\/png","size":93616,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/2025\/01\/23\/Picture1.png?itok=P6iA7rv1"}}},"media_ids":["676117"],"groups":[{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[{"id":"166937","name":"School of Physics"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"177814","name":"Postdoc"},{"id":"174045","name":"Graduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}