Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24435
DC Field | Value | Language |
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dc.contributor.author | Principe, David | en_US |
dc.contributor.author | Kastner, Joel | en_US |
dc.contributor.author | ALCALA', JUAN MANUEL | en_US |
dc.contributor.author | Bessell, Michael S. | en_US |
dc.contributor.author | Huenemoerder, David | en_US |
dc.contributor.author | SACCO, GIUSEPPE GERMANO | en_US |
dc.contributor.author | Stelzer, B. | en_US |
dc.date.accessioned | 2020-05-04T13:28:33Z | - |
dc.date.available | 2020-05-04T13:28:33Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24435 | - |
dc.description.abstract | We investigate, via contemporaneous X-ray and optical/IR observations, the nearby, pre-main sequence star/disk systems T Chamaeleontis (T Cha; D ~ 110 pc, age 3-5 Myr) and TWA 30A and 30B (D ~ 40 pc; age ~ 8 Myr). All three of these systems present opportunities to probe pre-main sequence (pre-MS) star-disk interactions during late-stage circumstellar disk evolution. The classical T Tauri star T Cha is the closest known example of a highly inclined, actively accreting, solar-mass star/disk system; furthermore, T Cha may be orbited by a low-mass companion or massive planet that has cleared an inner hole in its disk. We analyze near-simultaneous Chandra high-resolution X-ray and optical H-alpha spectroscopy observations of T Cha and find a correlation between X-ray and optical extinction resulting from variable photospheric obscuration from a disk warp/clump. We search for signatures of accretion and infer the X-ray absorbing properties of the T Cha circumstellar disk.We also present contemporaneous XMM-Newton X-ray and optical/IR spectroscopic observations of the nearby, actively accreting, very low-mass (mid-M) pre-MS star/disk/jet systems TWA 30A and 30B. Like T Cha, each component of this wide binary is viewed through a nearly edge-on circumstellar disk. We investigate potential X-ray accretion signatures, and compare the levels of magnetic activity in TWA 30A and 30B to those of other nearby, low-mass pre-MS stars near the H-burning limit. Both TWA 30A and 30B display large near-IR variability, suggestive of (respectively) variable obscuration of the stellar photosphere and a possible disk-rim warp. We detect only TWA 30A in X-rays and, similar to the case of T Cha, find a correlation between optical/IR and X-ray extinction associated with variable photospheric obscuration. The proximity and highly-inclined viewing geometries of the TWA 30 pair and T Cha, combined with contemporaneous optical/IR and X-ray observations, afford a unique opportunity to investigate the composition of late-stage circumstellar disks orbiting pre-MS stars. | en |
dc.language.iso | eng | en_US |
dc.title | Investigating Star-disk Interactions During Late-stage Circusmtellar Disk Evolution in the Nearby Pre-MS Stars T Cha and TWA 30 | en_US |
dc.type | Conference abstract | - |
dc.identifier.url | https://aas.org/sites/default/files/2020-01/AAS_225_Abstracts.pdf | en_US |
dc.relation.medium | ELETTRONICO | en_US |
dc.relation.volume | 225 | en_US |
dc.relation.firstpage | 449.12 | en_US |
dc.type.referee | REF_3 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | AUS | en_US |
dc.contributor.country | CPV | en_US |
dc.contributor.country | CHL | en_US |
dc.relation.ispartofbook | American Astronomical Society Meeting Abstracts #225 | en_US |
dc.type.invited | sì | en_US |
dc.relation.conferencename | 225th Meeting of the American Astronomical Society | en_US |
dc.relation.conferenceplace | Seattle | en_US |
dc.relation.conferencedate | January 2015 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.type.miur | 274 Abstract in Atti di convegno | - |
dc.identifier.adsbibcode | 2015AAS...22544912P | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Conference abstract | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.orcid | 0000-0001-8657-095X | - |
crisitem.author.orcid | 0000-0002-6893-2221 | - |
crisitem.author.orcid | 0000-0003-4929-5703 | - |
Appears in Collections: | 3.02 Abstract in Atti di convegno |
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File | Description | Size | Format | |
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2015ASS...22544912P.pdf | 36.79 kB | Adobe PDF | View/Open |
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