| Proposal ID | 086037 |
| Title | Probing Accretion Disks on Intermediate Size Scales: the Case of V630 Cas |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0860370101 |
| DOI | https://doi.org/10.57780/esa-0epxgxl |
| Principal Investigator, PI | Dr Koji Mukai |
| Abstract | V630 Cas is one of several long-period cataclysmic variables with rare,long-duration, dwarf nova outbursts. The characteristics of these outbursts arelikely shaped by the large physical size of the accretion disks. Moreover, theyoften are luminous (> 10e33 ergs/s) X-ray sources in quiescence, severelychallenging the disk instability model. Here we propose an XMM-Newtonobservation of V630 Cas in quiescence to constrain the white dwarf mass and theaccretion rate, possibly adding it to the list of troubling systems with a highaccretion rate white dwarf with a large, quiescent accretion disk. We alsopropose to obtain fast UV photometry with the OM, since UV flickering is a keydiagnostic of accretion for the related class of symbiotic stars. |
| Publications |
|
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2020-06-28T20:07:12Z/2020-08-04T03:25:46Z |
| Version | 18.02_20200221_1200 |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2021-08-27T00:00:00Z |
| Last Update | 2026-03-04 |
| Keywords | "accretion dis", "disk instability model", "physical size", "period cataclysmic variables", "dwarf nova outburst", "XMM-Newton", "v630 cas", "troubling systems", "white dwarf mass", "10e33 ergs", "xmm newton", "probing accretion dis", "accretion rate", "symbiotic stars", "related class", "quiescent accretion disk", "fast uv photometry", "XMM", "key diagnostic", "xray sources", "uv flickering" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Koji Mukai, 2021, 'Probing Accretion Disks on Intermediate Size Scales: the Case of V630 Cas', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-0epxgxl |