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1. Identity statement
Reference TypeJournal Article
Sitemtc-m21c.sid.inpe.br
Holder Codeisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identifier8JMKD3MGP3W34R/3T4GAN2
Repositorysid.inpe.br/mtc-m21c/2019/04.08.11.33
Last Update2019:04.08.11.33.19 (UTC) simone
Metadata Repositorysid.inpe.br/mtc-m21c/2019/04.08.11.33.19
Metadata Last Update2020:01.06.11.42.12 (UTC) administrator
DOI10.1093/mnras/stz067
ISSN0035-8711
1365-2966
Citation KeyDamineliFACDGHHJMMNRRSSW:2019:DiCiSt
TitleDistinguishing circumstellar from stellar photometric variability in Eta Carinae
Year2019
MonthMar.
Access Date2024, May 17
Type of Workjournal article
Secondary TypePRE PI
Number of Files1
Size4555 KiB
2. Context
Author 1 Damineli, Augusto
 2 Fernandez-Lajus, E.
 3 Almeida, L. A.
 4 Corcoran, M. F.
 5 Damineli, D. S. C.
 6 Gull, T. R.
 7 Hamaguchi, K.
 8 Hillier, D. J.
 9 Jablonski, Francisco José
10 Madura, T. I.
11 Moffat, A. F. J.
12 Navarete, Felipe
13 Richardson, Noel D.
14 Ruiz, G. F.
15 Salerno, N. E.
16 Scalia, M. C.
17 Weigelt, Gerd
Resume Identifier 1
 2
 3
 4
 5
 6
 7
 8
 9 8JMKD3MGP5W/3C9JH4Q
ORCID 1 0000-0002-7978-2994
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12 0000-0002-0284-0578
13 0000-0002-2806-9339
14
15
16
17 0000-0001-9754-2233
Group 1
 2
 3
 4
 5
 6
 7
 8
 9 DIDAS-CGCEA-INPE-MCTIC-GOV-BR
Affiliation 1 Universidade de São Paulo (USP)
 2 Universidad Nacional de La Plata
 3 Universidade de São Paulo (USP)
 4 NASA Goddard Space Flight Center
 5 University of Maryland
 6 NASA Goddard Space Flight Center
 7 NASA Goddard Space Flight Center
 8 University of Pittsburgh
 9 Instituto Nacional de Pesquisas Espaciais (INPE)
10 San Jose State University
11 Université de Montréal
12 Universidade de São Paulo (USP)
13 The University of Toledo
14 Universidade de São Paulo (USP)
15 Universidad Nacional de La Plata
16 Universidad Nacional de La Plata
17 Max Planck Institute for Radio Astronomy
Author e-Mail Address 1 augusto.damineli@gmail.com
JournalMonthly Notices of the Royal Astronomical Society
Volume484
Number1
Pages1325-1346
Secondary MarkA1_QUÍMICA A1_INTERDISCIPLINAR A1_GEOCIÊNCIAS A1_ENGENHARIAS_III A2_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA A2_ASTRONOMIA_/_FÍSICA B2_ENSINO B5_ENGENHARIAS_IV
History (UTC)2019-04-08 11:33:19 :: simone -> administrator ::
2019-04-08 11:33:19 :: administrator -> simone :: 2019
2019-04-08 11:37:31 :: simone -> administrator :: 2019
2020-01-06 11:42:12 :: administrator -> simone :: 2019
3. Content and structure
Is the master or a copy?is the master
Content Stagecompleted
Transferable1
Content TypeExternal Contribution
Version Typepublisher
Keywordsbinaries: general
stars: evolution
stars: individual (eta Carinae)
stars: winds
outflows
dust
extinction
AbstractThe interacting binary Eta Carinae remains one of the most enigmatic massive stars in our Galaxy despite over four centuries of observations. In this work, its light curve from the ultraviolet to the near-infrared is analysed using spatially resolved HST observations and intense monitoring at the La Plata Observatory, combined with previously published photometry. We have developed a method to separate the central stellar object in the ground-based images using HST photometry and applying it to the more numerous ground-based data, which supports the hypothesis that the central source is brightening faster than the almost-constant Homunculus. After detrending from long-term brightening, the light curve shows periodic orbital modulation (Delta V similar to 0.6 mag) attributed to the wind-wind collision cavity as it sweeps around the primary star and it shows variable projected area to our line-of-sight. Two quasi-periodic components with time-scales of 2-3 and 8-10 yr and low amplitude, Delta V < 0.2 mag, are superimposed on the brightening light curve, being the only stellar component of variability found, which indicates minimal stellar instability. Moreover, the light-curve analysis shows no evidence of 'shell ejections' at periastron. We propose that the long-term brightening of the stellar core is due to the dissipation of a dusty clump in front of the central star, which works like a natural coronagraph. Thus, the central stars appear to be more stable than previously thought since the dominant variability originates from a changing circumstellar medium. We predict that the brightening phase, due mainly to dust dissipation, will be completed around 2032 +/- 4 yr, when the star will be brighter than in the 1600s by up to Delta V similar to 1 mag.
AreaCEA
Arrangementurlib.net > Fonds > Produção anterior à 2021 > DIDAS > Distinguishing circumstellar from...
doc Directory Contentaccess
source Directory Contentthere are no files
agreement Directory Content
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4. Conditions of access and use
data URLhttp://urlib.net/ibi/8JMKD3MGP3W34R/3T4GAN2
zipped data URLhttp://urlib.net/zip/8JMKD3MGP3W34R/3T4GAN2
Languageen
Target Filedamineli_distinguishing.pdf
User Groupsimone
Reader Groupadministrator
simone
Visibilityshown
Archiving Policyallowpublisher allowfinaldraft
Update Permissionnot transferred
5. Allied materials
Next Higher Units8JMKD3MGPCW/3ETR8EH
Citing Item Listsid.inpe.br/mtc-m21/2012/07.13.14.46.25 1
sid.inpe.br/bibdigital/2013/10.01.00.07 1
DisseminationWEBSCI; PORTALCAPES; MGA; COMPENDEX.
Host Collectionurlib.net/www/2017/11.22.19.04
6. Notes
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