Evidence of the Evolved Nature of the B[e] Star MWC 137

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F15%3A00445025" target="_blank" >RIV/67985815:_____/15:00445025 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/0004-6256/149/1/13" target="_blank" >http://dx.doi.org/10.1088/0004-6256/149/1/13</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0004-6256/149/1/13" target="_blank" >10.1088/0004-6256/149/1/13</a>

Result language

angličtina

Original language name

Evidence of the Evolved Nature of the B[e] Star MWC 137

Original language description

Our goal is to clarify the evolutionary stage of this peculiar object, and to study the CO molecular component of its circumstellar medium. To this purpose, we modeled the CO molecular bands using high-resolution K-band spectra.We find that MWC137 is surrounded by a detached cool (T = 1900 +/- 100 K) and dense (N = (3 +/- 1) +/- 10(21) cm(-2)) ring of CO gas orbiting the star with a rotational velocity, projected to the line of sight, of 84 +/- 2 km s(-1). We also find that the molecular gas is enrichedin the isotope C-13, excluding the classification of the star as a Herbig Be. The observed isotopic abundance ratio (C-12/C-13 = 25 +/- 2) derived from our modeling is compatible with a proto-planetary nebula, main-sequence, or supergiant evolutionary phase. However, based on some observable characteristics of MWC137, we propose that the supergiant scenario seems to be the most plausible. Hence, we suggest that MWC137 could be in an extremely short-lived phase, evolving from a B[e] supe

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomical Journal

ISSN

0004-6256

e-ISSN

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Volume of the periodical

149

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

"13/1"-"13/9"

UT code for WoS article

000347308300013

EID of the result in the Scopus database

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