Infrared Spectroscopy of Be Stars: Influence of the Envelope Parameters on Brackett-Series Behaviour

The IR spectra of Be stars display numerous hydrogen recombination lines, constituting a great resource for obtaining information on the physical and dynamic structures of different regions within the circumstellar envelope. Nevertheless, this spectral region has not been analysed in depth, and ther...

Descripción completa

Detalles Bibliográficos
Autores principales: Cochetti, Yanina Roxana, Granada, Anahí, Arias, María Laura, Torres, Andrea Fabiana, Arcos, Catalina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2023
Materias:
Ciencias Astronómicas
stars: early-type
stars: emission-line, Be
stars: individual: MX Pup, p Aqr
circumstellar matter
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/159969
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-159969
record_format dspace
spelling I19-R120-10915-1599692023-11-09T20:03:49Z http://sedici.unlp.edu.ar/handle/10915/159969 Infrared Spectroscopy of Be Stars: Influence of the Envelope Parameters on Brackett-Series Behaviour Cochetti, Yanina Roxana Granada, Anahí Arias, María Laura Torres, Andrea Fabiana Arcos, Catalina 2023 2023-11-09T12:39:59Z en Ciencias Astronómicas stars: early-type stars: emission-line, Be stars: individual: MX Pup, p Aqr circumstellar matter The IR spectra of Be stars display numerous hydrogen recombination lines, constituting a great resource for obtaining information on the physical and dynamic structures of different regions within the circumstellar envelope. Nevertheless, this spectral region has not been analysed in depth, and there is a lack of synthetic spectra with which to compare observations. Therefore, we computed synthetic spectra with the HDUST code for different disc parameters. Here, we present our results on the spectral region that includes lines of the Brackett series. We discuss the dependence of the line series strengths on several parameters that describe the structure of the disc. We also compared model line profiles, fluxes, and EWs with observational data for two Be stars (MX Pup and p Aqr). Even though the synthetic spectra adequately fit our observations of both stars and allow us to constrain the parameters of the disc, there is a discrepancy with the observed data in the EW and flux measurements, especially in the case of MXPup. It is possible that by including Brackett lines of higher terms or adding the analysis of other series, we may be able to better constrain the parameters of the observed disc. Instituto de Astrofísica de La Plata Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
stars: early-type
stars: emission-line, Be
stars: individual: MX Pup, p Aqr
circumstellar matter
spellingShingle Ciencias Astronómicas
stars: early-type
stars: emission-line, Be
stars: individual: MX Pup, p Aqr
circumstellar matter
Cochetti, Yanina Roxana
Granada, Anahí
Arias, María Laura
Torres, Andrea Fabiana
Arcos, Catalina
Infrared Spectroscopy of Be Stars: Influence of the Envelope Parameters on Brackett-Series Behaviour
topic_facet Ciencias Astronómicas
stars: early-type
stars: emission-line, Be
stars: individual: MX Pup, p Aqr
circumstellar matter
description The IR spectra of Be stars display numerous hydrogen recombination lines, constituting a great resource for obtaining information on the physical and dynamic structures of different regions within the circumstellar envelope. Nevertheless, this spectral region has not been analysed in depth, and there is a lack of synthetic spectra with which to compare observations. Therefore, we computed synthetic spectra with the HDUST code for different disc parameters. Here, we present our results on the spectral region that includes lines of the Brackett series. We discuss the dependence of the line series strengths on several parameters that describe the structure of the disc. We also compared model line profiles, fluxes, and EWs with observational data for two Be stars (MX Pup and p Aqr). Even though the synthetic spectra adequately fit our observations of both stars and allow us to constrain the parameters of the disc, there is a discrepancy with the observed data in the EW and flux measurements, especially in the case of MXPup. It is possible that by including Brackett lines of higher terms or adding the analysis of other series, we may be able to better constrain the parameters of the observed disc.
format Articulo
Articulo
author Cochetti, Yanina Roxana
Granada, Anahí
Arias, María Laura
Torres, Andrea Fabiana
Arcos, Catalina
author_facet Cochetti, Yanina Roxana
Granada, Anahí
Arias, María Laura
Torres, Andrea Fabiana
Arcos, Catalina
author_sort Cochetti, Yanina Roxana
title Infrared Spectroscopy of Be Stars: Influence of the Envelope Parameters on Brackett-Series Behaviour
title_short Infrared Spectroscopy of Be Stars: Influence of the Envelope Parameters on Brackett-Series Behaviour
title_full Infrared Spectroscopy of Be Stars: Influence of the Envelope Parameters on Brackett-Series Behaviour
title_fullStr Infrared Spectroscopy of Be Stars: Influence of the Envelope Parameters on Brackett-Series Behaviour
title_full_unstemmed Infrared Spectroscopy of Be Stars: Influence of the Envelope Parameters on Brackett-Series Behaviour
title_sort infrared spectroscopy of be stars: influence of the envelope parameters on brackett-series behaviour
publishDate 2023
url http://sedici.unlp.edu.ar/handle/10915/159969
work_keys_str_mv AT cochettiyaninaroxana infraredspectroscopyofbestarsinfluenceoftheenvelopeparametersonbrackettseriesbehaviour
AT granadaanahi infraredspectroscopyofbestarsinfluenceoftheenvelopeparametersonbrackettseriesbehaviour
AT ariasmarialaura infraredspectroscopyofbestarsinfluenceoftheenvelopeparametersonbrackettseriesbehaviour
AT torresandreafabiana infraredspectroscopyofbestarsinfluenceoftheenvelopeparametersonbrackettseriesbehaviour
AT arcoscatalina infraredspectroscopyofbestarsinfluenceoftheenvelopeparametersonbrackettseriesbehaviour
_version_ 1807221806807908352

Ejemplares similares