Registro completo de metadatos
| Campo DC | Valor | Lengua/Idioma |
|---|---|---|
| dc.creator | Brickhouse, N. S. | - |
| dc.creator | Cranmer, S. R. | - |
| dc.creator | Dupree, A. K. | - |
| dc.creator | Günther, H. M. | - |
| dc.creator | Luna, Gerardo Juan Manuel | - |
| dc.creator | Wolk, S. J. | - |
| dc.date | 2017-07-04T20:16:00Z | - |
| dc.date | 2017-07-04T20:16:00Z | - |
| dc.date | 2012-11-05 | - |
| dc.date | 2017-07-04T14:08:46Z | - |
| dc.date.accessioned | 2019-04-29T15:50:51Z | - |
| dc.date.available | 2019-04-29T15:50:51Z | - |
| dc.date.issued | 2012-11-05 | - |
| dc.identifier | Brickhouse, N. S.; Cranmer, S. R.; Dupree, A. K.; Günther, H. M.; Luna, Gerardo Juan Manuel; et al.; X-Ray Determination of the Variable Rate of Mass Accretion onto TW Hydrae; IOP Publishing; The Astrophysical Journal Letters; 760; 2; 5-11-2012; L21,1-5 | - |
| dc.identifier | 2041-8205 | - |
| dc.identifier | http://hdl.handle.net/11336/19528 | - |
| dc.identifier | CONICET Digital | - |
| dc.identifier | CONICET | - |
| dc.identifier.uri | http://rodna.bn.gov.ar:8080/jspui/handle/bnmm/303593 | - |
| dc.description | Diagnostics of electron temperature (Te), electron density (ne), and hydrogen column density (NH) from the Chandra High Energy Transmission Grating spectrum of He-like Ne ix in TW Hydrae (TW Hya), in conjunction with a classical accretion model, allow us to infer the accretion rate onto the star directly from measurements of the accreting material. The new method introduces the use of the absorption of Ne ix lines as a measure of the column density of the intervening, accreting material. On average, the derived mass accretion rate for TW Hya is 1.5 × 10−9 M yr−1, for a stellar magnetic field strength of 600 G and a filling factor of 3.5%. Three individual Chandra exposures show statistically significant differences in the Ne ix line ratios, indicating changes in NH, Te, and ne by factors of 0.28, 1.6, and 1.3, respectively. In exposures separated by 2.7 days, the observations reported here suggest a five-fold reduction in the accretion rate. This powerful new technique promises to substantially improve our understanding of the accretion process in young stars. | - |
| dc.description | Fil: Brickhouse, N. S.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos | - |
| dc.description | Fil: Cranmer, S. R.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos | - |
| dc.description | Fil: Dupree, A. K.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos | - |
| dc.description | Fil: Günther, H. M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos | - |
| dc.description | Fil: Luna, Gerardo Juan Manuel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina | - |
| dc.description | Fil: Wolk, S. J.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos | - |
| dc.format | application/pdf | - |
| dc.format | application/pdf | - |
| dc.format | application/pdf | - |
| dc.format | application/pdf | - |
| dc.language | eng | - |
| dc.publisher | IOP Publishing | - |
| dc.relation | info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/2041-8205/760/2/L21/meta | - |
| dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/2041-8205/760/2/L21 | - |
| dc.relation | info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1211.1710 | - |
| dc.rights | info:eu-repo/semantics/openAccess | - |
| dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | - |
| dc.source | reponame:CONICET Digital (CONICET) | - |
| dc.source | instname:Consejo Nacional de Investigaciones Científicas y Técnicas | - |
| dc.source | instacron:CONICET | - |
| dc.subject | accretion, accretion disks | - |
| dc.subject | stars: formation | - |
| dc.subject | stars: individual (TW Hydrae) | - |
| dc.subject | techniques: spectroscopic | - |
| dc.subject | Astronomía | - |
| dc.subject | Ciencias Físicas | - |
| dc.subject | CIENCIAS NATURALES Y EXACTAS | - |
| dc.title | X-Ray Determination of the Variable Rate of Mass Accretion onto TW Hydrae | - |
| dc.type | info:eu-repo/semantics/article | - |
| dc.type | info:eu-repo/semantics/publishedVersion | - |
| dc.type | info:ar-repo/semantics/articulo | - |
| Aparece en las colecciones: | CONICET | |
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