Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/33056
Titolo: | Orbital solutions for SB2 systems with a HgMn component | Autori: | CATANZARO, Giovanni LETO, PAOLO |
Data pubblicazione: | 2004 | Rivista: | ASTRONOMY & ASTROPHYSICS | Numero: | 416 | Fascicolo: | 2 | Da pagina:: | 661 | Abstract: | From a new set of spectroscopic observations we determined orbital parameters of six SB2 systems with one or both components being HgMn stars.We slightly refined the orbital periods for <ASTROBJ>HD 32964</ASTROBJ>, <ASTROBJ>HD 173524</ASTROBJ>, <ASTROBJ>HD 174933</ASTROBJ> and <ASTROBJ>HD 216494</ASTROBJ>. Our results for <ASTROBJ>HD 358</ASTROBJ> are in agreement with the previous literature studies. Regarding <ASTROBJ>HD 33647</ASTROBJ>, our orbital period is shorter than previous determinations. <ASTROBJ>HD 173524</ASTROBJ> is a triple system. From the variations of the γ-velocity deduced from our and literature data, we refined the orbital period and we estimated the eccentricity of the third companion, for which we get e ≈ 0.13 and P<SUB>orb</SUB> = 36 ± 3 years. <ASTROBJ>HD 191110</ASTROBJ> and <ASTROBJ>HD 216494</ASTROBJ> seem to be the only synchronous SB2 within our sample. Following the hypothesis of rotational axes perpendicular to the orbital plane, we estimated the angle of the orbital plane to the line of sight. We identified in our spectra the signature of the H<SUB>β</SUB> of the third component of <ASTROBJ>HD 216494</ASTROBJ> and we highlight a slight variation of the γ-velocity due to the presence of this component.Based on observations collected at the Stellar Station ``M. G. Fracastoro'' of the Catania Astrophysical Observatory, Italy.Appendix A is only available in electronic form at http://www.edpsciences.org | URI: | http://hdl.handle.net/20.500.12386/33056 | URL: | https://www.aanda.org/articles/aa/abs/2004/11/aa0445/aa0445.html | ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361:20034445 | Bibcode ADS: | 2004A&A...416..661C | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
aa0445.pdf | Pdf editoriale | 224.52 kB | Adobe PDF | Visualizza/apri |
Page view(s)
29
controllato il 23-apr-2024
Download(s)
5
controllato il 23-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.