| Proposal ID | 020154 |
| Title | X-RAY EMISSION FROM LOW-MASS PROTOSTARS IN THE L1251 DARK CLOUD |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201540101 |
| DOI | https://doi.org/10.5270/esa-ma73k5f |
| Principal Investigator, PI | Dr THEODORE SIMON |
| Abstract | Until recently no Class 0 object had ever been detected as an X ray source. I amproposing a 35 ks observation of L1251, a small dark cloud which is a site ofactive star formation. L1251 harbors a number of high-velocity molecularoutflows, long chains of HH emission knots, and low-luminosity IRAS sources. Twoof the IRAS sources appear to be young (10^5 yr) Class 0 objects of about solarmass. A goal of this observation is to determine whether the X ray properties ofthese objects, including their surrounding environments, are different fromthose of embedded protostars that form in much more massive clouds. Because ofits lower density and mass, the L1251 cloud may be more transparent to X raysand more easily probed than a dense cloud like Orion. |
| Publications |
|
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2003-12-29T19:15:15Z/2003-12-30T04:57:11Z |
| Version | 17.56_20190403_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 | 2005-01-29T00:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "easily probed", "iras sources", "am proposing", "yr class", "l1251 harbors", "l1251 dark cloud", "velocity molecular outflows", "active star formation", "hh emission knots", "embedded protostars", "dark cloud", "xray properties", "low mass protostars", "l1251 cloud", "x ray emission", "xray source", "dense cloud", "massive clouds", "lower density", "solar mass" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr THEODORE SIMON, 2005, 'X-RAY EMISSION FROM LOW-MASS PROTOSTARS IN THE L1251 DARK CLOUD', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ma73k5f |