Nitrogen abundances of the Be-type stars in 30 Doradus

P L Dufton; N Langer; D J Lennon; F R N Schneider; C J Evans; H Sana; W D Taylor

doi:10.1093/mnras/stad3537

Nitrogen abundances of the Be-type stars in 30 Doradus

P L Dufton
, N Langer
, D J Lennon
, F R N Schneider
, C J Evans
, H Sana
, W D Taylor

School of Mathematics and Physics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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Abstract

A subset of the 67 Be-type stars observed in 30 Doradus during the VLT-FLAMES Tarantula Survey (VFTS) campaign have been analysed to estimate atmospheric parameters and chemical compositions, in particular their nitrogen abundance. Reliable results were found for 23 targets comprising the largest LMC sample currently available. The nitrogen abundance estimates have been compared with predictions from evolutionary models for rapidly rotating single stars (or non-interacting multiple systems) and for interacting binaries. The observations appear to be incompatible with all the targets having a single star evolutionary history. The results agree better with a binary evolutionary history with at least 30% of the VFTS sample having apparently evolved by this pathway. These conclusions are consistent with a previous analysis of the vesin i-estimates for this Be-type sample.

Original language	English
Pages (from-to)	5155-5165
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	527
Issue number	3
Early online date	16 Nov 2023
DOIs	https://doi.org/10.1093/mnras/stad3537
Publication status	Published - Jan 2024

Keywords

Space and Planetary Science
Astronomy and Astrophysics

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10.1093/mnras/stad3537Licence: CC BY

Nitrogen abundances of the Be-type stars in 30 Doradus
Copyright 2023 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
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title = "Nitrogen abundances of the Be-type stars in 30 Doradus",

abstract = "A subset of the 67 Be-type stars observed in 30 Doradus during the VLT-FLAMES Tarantula Survey (VFTS) campaign have been analysed to estimate atmospheric parameters and chemical compositions, in particular their nitrogen abundance. Reliable results were found for 23 targets comprising the largest LMC sample currently available. The nitrogen abundance estimates have been compared with predictions from evolutionary models for rapidly rotating single stars (or non-interacting multiple systems) and for interacting binaries. The observations appear to be incompatible with all the targets having a single star evolutionary history. The results agree better with a binary evolutionary history with at least 30\% of the VFTS sample having apparently evolved by this pathway. These conclusions are consistent with a previous analysis of the vesin i-estimates for this Be-type sample.",

keywords = "Space and Planetary Science, Astronomy and Astrophysics",

author = "Dufton, \{P L\} and N Langer and Lennon, \{D J\} and Schneider, \{F R N\} and Evans, \{C J\} and H Sana and Taylor, \{W D\}",

year = "2024",

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doi = "10.1093/mnras/stad3537",

language = "English",

volume = "527",

pages = "5155--5165",

journal = "Monthly Notices of the Royal Astronomical Society",

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}

TY - JOUR

T1 - Nitrogen abundances of the Be-type stars in 30 Doradus

AU - Dufton, P L

AU - Langer, N

AU - Lennon, D J

AU - Schneider, F R N

AU - Evans, C J

AU - Sana, H

AU - Taylor, W D

PY - 2024/1

Y1 - 2024/1

N2 - A subset of the 67 Be-type stars observed in 30 Doradus during the VLT-FLAMES Tarantula Survey (VFTS) campaign have been analysed to estimate atmospheric parameters and chemical compositions, in particular their nitrogen abundance. Reliable results were found for 23 targets comprising the largest LMC sample currently available. The nitrogen abundance estimates have been compared with predictions from evolutionary models for rapidly rotating single stars (or non-interacting multiple systems) and for interacting binaries. The observations appear to be incompatible with all the targets having a single star evolutionary history. The results agree better with a binary evolutionary history with at least 30% of the VFTS sample having apparently evolved by this pathway. These conclusions are consistent with a previous analysis of the vesin i-estimates for this Be-type sample.

AB - A subset of the 67 Be-type stars observed in 30 Doradus during the VLT-FLAMES Tarantula Survey (VFTS) campaign have been analysed to estimate atmospheric parameters and chemical compositions, in particular their nitrogen abundance. Reliable results were found for 23 targets comprising the largest LMC sample currently available. The nitrogen abundance estimates have been compared with predictions from evolutionary models for rapidly rotating single stars (or non-interacting multiple systems) and for interacting binaries. The observations appear to be incompatible with all the targets having a single star evolutionary history. The results agree better with a binary evolutionary history with at least 30% of the VFTS sample having apparently evolved by this pathway. These conclusions are consistent with a previous analysis of the vesin i-estimates for this Be-type sample.

KW - Space and Planetary Science

KW - Astronomy and Astrophysics

U2 - 10.1093/mnras/stad3537

DO - 10.1093/mnras/stad3537

M3 - Article

SN - 0035-8711

VL - 527

SP - 5155

EP - 5165

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Nitrogen abundances of the Be-type stars in 30 Doradus

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