Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24321
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Principe, David A. | en_US |
dc.contributor.author | SACCO, GIUSEPPE GERMANO | en_US |
dc.contributor.author | Kastner, J. H. | en_US |
dc.contributor.author | STELZER, BEATE | en_US |
dc.contributor.author | ALCALA', JUAN MANUEL | en_US |
dc.date.accessioned | 2020-04-29T13:56:01Z | - |
dc.date.available | 2020-04-29T13:56:01Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24321 | - |
dc.description.abstract | We present contemporaneous XMM-Newton X-ray and ground-based optical/near-IR spectroscopic observations of the nearby (D ≈ 42 pc), low-mass (mid-M) binary system TWA 30A and 30B. The components of this wide (separation ∼3400 au) binary are notable for their nearly edge-on disc viewing geometries, high levels of variability, and evidence for collimated stellar outflows. We obtained XMM-Newton X-ray observations of TWA 30A and 30B in 2011 June and July, accompanied (respectively) by Infrared Telescope Facility SpeX (near-IR) and VLT XSHOOTER (visible/near-IR) spectroscopy obtained within ∼20 h of the X-ray observations. TWA 30A was detected in both XMM-Newton observations at relatively faint intrinsic X-ray luminosities (LX ∼ 8 × 1027 erg s-1) compared to stars of similar mass and age. The intrinsic (0.15-2.0 keV) X-ray luminosities measured in 2011 had decreased by a factor 20-100 relative to a 1990 (ROSAT) X-ray detection. TWA 30B was not detected, and we infer an upper limit on its X-ray Luminosity of LX ≲ 3.0 × 1027 erg s-1. We measured a decrease in visual extinction towards TWA 30A (from AV ≈ 14.9 to AV ≈ 4.7) between the two 2011 observing epochs, and we find evidence for a corresponding significant decrease in X-ray absorbing column (NH). The apparent correlated change in AV and NH is suggestive of variable obscuration of the stellar photosphere by disc material composed of both gas and dust. However, in both observations, the inferred NH to AV ratio is lower than that typical of the interstellar medium, suggesting that the disc is either depleted of gas or is deficient in metals in the gas phase. | en_US |
dc.language.iso | eng | en_US |
dc.title | Evidence for variable, correlated X-ray and optical/IR extinction towards the nearby, pre-main-sequence binary TWA 30 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stw693 | en_US |
dc.identifier.scopus | 2-s2.0-84974624123 | en_US |
dc.identifier.isi | 000377471200073 | en_US |
dc.identifier.url | http://arxiv.org/abs/1604.00397v1 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/459/2/2097/2595075 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 459 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 2097 | en_US |
dc.relation.lastpage | 2105 | en_US |
dc.type.referee | REF_1 | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016MNRAS.459.2097P | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.orcid | 0000-0002-6893-2221 | - |
crisitem.author.orcid | 0000-0003-4929-5703 | - |
crisitem.author.orcid | 0000-0001-8657-095X | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
stw693.pdf | editorial pdf | 932.31 kB | Adobe PDF | View/Open |
Page view(s)
56
checked on Mar 28, 2024
Download(s)
17
checked on Mar 28, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.