Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/24745
Titolo: | Method of LSD profile asymmetry for estimating the center of mass velocities of pulsating stars | Autori: | Britavskiy, N. PANCINO, ELENA Tsymbal, V. ROMANO, Donatella Cacciari, C. Clementini, C. |
Data pubblicazione: | 2016 | Titolo del volume in cui è pubblicato il poster: | RRL2015: High-Precision Studies of RR Lyrae Stars | Curatore/i del volume in cui è pubblicato il contributo: | Szabados, L.; Szabó, R.; Kinemuchi, K. | Serie: | COMMUNICATIONS FROM THE KONKOLY OBSERVATORY OF THE HUNGARIAN ACADEMY OF SCIENCES | Numero: | 105 | Da pagina:: | 105 | Abstract: | We present radial velocity analysis for 20 solar neighborhood RR Lyrae and 3 Population II Cepheids. High-resolution spectra were observed with either TNG/SARG or VLT/UVES over varying phases. To estimate the center of mass (barycentric) velocities of the program stars, we utilized two independent methods. First, the 'classic' method was employed, which is based on RR Lyrae radial velocity curve templates. Second, we provide the new method that used absorption line profile asymmetry to determine both the pulsation and the barycentric velocities even with a low number of high-resolution spectra and in cases where the phase of the observations is uncertain. This new method is based on a least squares deconvolution (LSD) of the line profiles in order to an- alyze line asymmetry that occurs in the spectra of pulsating stars. By applying this method to our sample stars we attain accurate measurements (+- 2 kms^-1) of the pulsation component of the radial velocity. This results in determination of the barycentric velocity to within 5 kms^-1 even with a low number of high- resolution spectra. A detailed investigation of LSD profile asymmetry shows the variable nature of the project factor at different pulsation phases, which should be taken into account in the detailed spectroscopic analysis of pulsating stars. | Titolo del convegno: | RRL2015: High-Precision Studies of RR Lyrae Stars | Luogo del convegno: | Visegràd (Ungheria) | Periodo del convegno: | 19-22 Ottobre, 2015 | URI: | http://hdl.handle.net/20.500.12386/24745 | URL: | https://www.konkoly.hu/Mitteilungen/105.html | ISSN: | 0238-2091 | Bibcode ADS: | 2016CoKon.105..105B | Fulltext: | open |
È visualizzato nelle collezioni: | 3.01 Contributi in Atti di convegno |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
Britavsky.pdf | PDF editoriale | 242.45 kB | Adobe PDF | Visualizza/apri |
Page view(s)
61
controllato il 3-mag-2024
Download(s)
22
controllato il 3-mag-2024
Google ScholarTM
Check
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.