| 1. Identity statement | ||||
| Reference Type | Conference Paper (Conference Proceedings) | |||
| Site | mtc-m21b.sid.inpe.br | |||
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identifier | 8JMKD3MGP3W34P/3L4Q8D8 | |||
| Repository | sid.inpe.br/mtc-m21b/2016/02.02.18.10 | |||
| Last Update | 2020:09.30.17.02.18 (UTC) simone | |||
| Metadata Repository | sid.inpe.br/mtc-m21b/2016/02.02.18.10.25 | |||
| Metadata Last Update | 2020:09.30.17.02.19 (UTC) simone | |||
| Secondary Key | INPE--PRE/ | |||
| Citation Key | TeodoroDRMSRGMPWCPFGHHNAJCHGHG:2016:UnNaHe | |||
| Title | Unveiling the nature of the He II λ4686 periodic minima in η Carinae  | |||
| Year | 2016 | |||
| Access Date | 2024, May 18 | |||
| Secondary Type | PRE CI | |||
| Number of Files | 1 | |||
| Size | 81 KiB | |||
| 2. Context | ||||
| Author | 1 Teodoro, Mairan 2 Damineli, Augusto 3 Richardson, Noel 4 Moffat, Anthony F. J. 5 St-Jean, Lucas 6 Russel, Christopher Michael Post 7 Gull, Theodore R. 8 Madura, Thomas 9 Pollard, Karen 10 Walter, Frederick M. 11 Coimbra, Adriano 12 Prates, Rodrigo 13 Fernández-Lajús, Eduardo 14 Gamen, Roberto 15 Hickel, Gabriel 16 Henrique, William 17 Navarete, Felipe 18 Andrade, Thiago 19 Jablonski, Francisco José 20 Corcoran, Michael F. 21 Hamaguchi, Kenji 22 Groh, Jose H. 23 Hillier, Desmond John 24 Gerd, Weigelt | |||
| Resume Identifier | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 8JMKD3MGP5W/3C9JH4Q | |||
| Group | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 DAS-CEA-INPE-MCTI-GOV-BR | |||
| Affiliation | 1 USRA 2 Universidade de São Paulo (USP) 3 Université de Montréal 4 Université de Montréal 5 Université de Montréal 6 NASA/GSFC 7 NASA/GSFC 8 USRA 9 University of Canterbury 10 Stony Brook University 11 LNA 12 LNA 13 Universidad Nacional de La Plata 14 Universidad Nacional de La Plata 15 Universidade Federal de Itajubá (UNIFEI) 16 Universidade Federal de Itajubá (UNIFEI) 17 Universidade de São Paulo (USP) 18 Universidade de São Paulo (USP) 19 Instituto Nacional de Pesquisas Espaciais (INPE) 20 USRA 21 CRESST 22 Geneva Observatory 23 University of Pittsburgh 24 Max-Planck-Institut für Radioastronomie | |||
| Author e-Mail Address | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 chico@das.inpe.br | |||
| Conference Name | American Astronautical Society, Meeting, 227 | |||
| Conference Location | Kissimmee, FL | |||
| Date | 4-8 Jan. | |||
| History (UTC) | 2016-02-02 18:10:25 :: simone -> administrator :: 2018-06-04 02:40:33 :: administrator -> simone :: 2016 | |||
| 3. Content and structure | ||||
| Is the master or a copy? | is the master | |||
| Content Stage | completed | |||
| Transferable | 1 | |||
| Content Type | External Contribution | |||
| Version Type | publisher | |||
| Abstract | η Carinae is known to be a massive binary system, but some of the orbital parameters remain uncertain. The nature of the periodic minima seen in several spectral features are associated with periastron passages near stellar conjunction, but its nature has been interpreted either as a low excitation event or as an eclipse of the hotter secondary star by the dense inner wind of the primary. We conducted an intense spectroscopic monitoring of the He II λ4686 emission line across the 2014.6 event using ground- and space-based telescopes. Comparison with results from the past two events confirmed the stability of the equivalent width and radial velocity of this line, as well as the strict periodicity of its minima. In combination with different other measurements, the orbital period is 2022.7 (±0.3) d. We adopted a power law model in combination with the total opacity in the line of sight to the apex of the wind-wind collision region obtained from hydrodynamic simulations to reproduce the observed He II λ4686 equivalent width curve. We constrained the orbital inclination to 135°153° and the longitude of periastron to 234°252°. Periastron passage occurred on T (2014.6)=2456874.4 (±1.3) d. With these orbital elements, we successfully reproduced both the equivalent width curve observed from our direct view of the central source and the polar view. This suggests that the He II λ4686 minimum is ultimately caused by an increase in the opacity in the line of sight to the emitting region as the secondary star moves behind the primary star and plunges into denser regions of its wind. | |||
| Area | CEA | |||
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDAS > Unveiling the nature... | |||
| doc Directory Content | access | |||
| source Directory Content | there are no files | |||
| agreement Directory Content |
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| 4. Conditions of access and use | ||||
| data URL | http://mtc-m21b.sid.inpe.br/ibi/8JMKD3MGP3W34P/3L4Q8D8 | |||
| zipped data URL | http://mtc-m21b.sid.inpe.br/zip/8JMKD3MGP3W34P/3L4Q8D8 | |||
| Target File | Teodoro_unveiling.pdf | |||
| User Group | simone | |||
| Reader Group | administrator simone | |||
| Visibility | shown | |||
| Update Permission | not transferred | |||
| 5. Allied materials | ||||
| Mirror Repository | urlib.net/www/2011/03.29.20.55 | |||
| Next Higher Units | 8JMKD3MGPCW/3ETR8EH | |||
| Citing Item List | ||||
| Host Collection | sid.inpe.br/mtc-m21b/2013/09.26.14.25.20 | |||
| 6. Notes | ||||
| Empty Fields | archivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn keywords label language lineage mark nextedition notes numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readpermission rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype type url volume | |||
| 7. Description control | ||||
| e-Mail (login) | simone | |||
| update | ||||