Study of classical Be stars in open clusters older than 100 Myr

Jagadeesh, Madhu Kashyap; Mathew, Blesson; Paul, K. T.; Banerjee, Gourav; Subramaniam, Annapurni

doi:10.1007/s12036-021-09780-w

Cited by 1 publication

(10 citation statements)

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“…In this section we present the results from the analysis of the spectra of 16 CBe stars. They belong to spectral types B0-B8 (Jagadeesh et al 2021). Out of 16 stars, 10 are similar to or earlier than the B3 spectral type, whereas others are later than B5.…”

Section: Resultsmentioning

confidence: 99%

“…We were not able to reestimate the spectral types of the sample stars using spectroscopy since we could not obtain the spectra in the blue region, centered at the Hβ line. Hence, we adopted the spectral type for every star as estimated by Jagadeesh et al (2021), using the photometric spectral classification method (shown in Table 1 of Jagadeesh et al 2021).…”

Section: Resultsmentioning

confidence: 99%

“…In Table 2 of this section we describe the spectral features observed in every individual star. The relevant detailed literature for each star is mentioned in Jagadeesh et al (2021). During our previous study (Jagadeesh et al 2021), we found two stars ([KW97] 35-12 and HD 16080) exhibiting Hα in absorption.…”

Section: Observed Spectral Features In Individual Starsmentioning

confidence: 97%

“…The relevant detailed literature for each star is mentioned in Jagadeesh et al (2021). During our previous study (Jagadeesh et al 2021), we found two stars ([KW97] 35-12 and HD 16080) exhibiting Hα in absorption. Both were confirmed to be B-type stars by Jagadeesh et al (2021).…”

Section: Observed Spectral Features In Individual Starsmentioning

confidence: 97%

“…The spectral lines identified in this study are described in Mathew & Subramaniam (2011). Motivated by this study, we performed a similar type of spectroscopic survey to search for CBe stars in 71 open clusters older than 100 Myr (Jagadeesh et al 2021). Our study identified 13 CBe stars located in 11 old open clusters.…”

mentioning

confidence: 99%

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Optical Spectroscopy of Classical Be Stars in Old Open Clusters

Jagadeesh¹,

Mathew

Paul

et al. 2023

Res. Astron. Astrophys.

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This is the first spectroscopic study of CBe stars in open clusters older than 100 Myr. We performed the optical spectroscopy of 16 classical Be stars in 11 open clusters older than 100 Myr. Among these 16 stars, we identified 15 stars from our previous slitless spectroscopy study. The remaining one, LS III +47 37b, is a new detection, which is confirmed through the present study. We found that the Hα emission strength of most of the stars is less than 40 ̊A, in agreement with the previous studies. Our analysis also suggests that one out of these 16 stars, [KW97] 35-12, might be a weak Hα emitter in nature showing Hα EW of -0.5 ̊A. Interestingly, we also found that these 16 stars exhibit lesser number of emission lines compared to classical Be stars younger than 100 Myr. Moreover, the spectral type distribution analysis of B-type and classical Be stars for selected clusters points out that there might be a probability that the existence of classical Be stars can depend on the incidence of B-type stars present in the respective clusters.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%