| Name | 067250 |
| Title | The X-ray emission of cTTS binary TWA 30 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0672500201 |
| DOI | https://doi.org/10.5270/esa-pdipgeb |
| Author | Dr Giuseppe Sacco |
| Description | The recently discovered binary system TWA 30 consists of two of the nearest known examples of actively accreting, pre-MS star systems. Both components of TWA 30 have masses just above the brown dwarf regime and are orbited by circumstellar disks viewed nearly edge-on. TWA 30A, a known X-ray source, exhibits large, variable optical-IR extinction that is evidently due to variable disk absorption. We propose to use XMM to obtain two 75 ks exposures of TWA 30, separated by at least one month. The resulting, merged gratings spectrum of TWA 30A and the EPIC CCD spectroscopy obtained at the two epochs for both stars will provide new constraints for models of pre-MS X-ray emission, and will supply unique information concerning disk viewing angles, masses, and gas-dust ratios in the TWA 30 system. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2011-06-07T10:17:49Z/2011-07-16T04:04:57Z |
| Version | 17.56_20190403_1200 |
| Mission Description | The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 | 2012-08-19T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2012-08-19T00:00:00Z, 067250, 17.56_20190403_1200. https://doi.org/10.5270/esa-pdipgeb |