Confirmation of the luminous blue variable status of MWC 930

A. S. Miroshnichenko; N. Manset; S. V. Zharikov; J. Zsargó; J. A. Juárez Jiménez; J. H. Groh; H. Levato; M. Grosso; R. J. Rudy; E. A. Laag; K. B. Crawford; R. C. Puetter; D. E. Reichart; K. M. Ivarsen; J. B. Haislip; M. C. Nysewander; A. P. Lacluyze

doi:10.1155/2014/130378

Confirmation of the luminous blue variable status of MWC 930

A. S. Miroshnichenko, N. Manset, S. V. Zharikov, J. Zsargó, J. A. Juárez Jiménez, J. H. Groh, H. Levato, M. Grosso, R. J. Rudy, E. A. Laag, K. B. Crawford, R. C. Puetter, D. E. Reichart, K. M. Ivarsen, J. B. Haislip, M. C. Nysewander, A. P. Lacluyze

Escuela Superior de Física y Matemáticas (ESFM)

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2 Scopus citations

Abstract

We present spectroscopic and photometric observations of the emission-line star MWC 930 (V446 Sct) during its long-term optical brightening in 2006-2013. Based on our earlier data we suggested that the object has features found in Luminous Blue Variables (LBV), such as a high luminosity (3 10⁵ L ȯ), a low wind terminal velocity (140 km s^-1), and a tendency to show strong brightness variations ( 1 mag over 20 years). For the last 7 years it has been exhibiting a continuous optical and near-IR brightening along with a change of the emission-line spectrum appearance and cooling of the star's photosphere. We present the object's V -band light curve, analyze the spectral variations, and compare the observed properties with those of other recognized Galactic LBVs, such as AG Car and HR Car. Overall we conclude the MWC 930 is a bona fide Galactic LBV that is currently in the middle of an S Dor cycle.

Original language	English
Article number	130378
Journal	Advances in Astronomy
Volume	2014
DOIs	https://doi.org/10.1155/2014/130378
State	Published - 2014

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Miroshnichenko, A. S., Manset, N., Zharikov, S. V., Zsargó, J., Juárez Jiménez, J. A., Groh, J. H., Levato, H., Grosso, M., Rudy, R. J., Laag, E. A., Crawford, K. B., Puetter, R. C., Reichart, D. E., Ivarsen, K. M., Haislip, J. B., Nysewander, M. C., & Lacluyze, A. P. (2014). Confirmation of the luminous blue variable status of MWC 930. Advances in Astronomy, 2014, Article 130378. https://doi.org/10.1155/2014/130378

@article{a1c5b6837219479aa45335297c4ab9aa,

title = "Confirmation of the luminous blue variable status of MWC 930",

abstract = "We present spectroscopic and photometric observations of the emission-line star MWC 930 (V446 Sct) during its long-term optical brightening in 2006-2013. Based on our earlier data we suggested that the object has features found in Luminous Blue Variables (LBV), such as a high luminosity (3 105 L ȯ), a low wind terminal velocity (140 km s-1), and a tendency to show strong brightness variations ( 1 mag over 20 years). For the last 7 years it has been exhibiting a continuous optical and near-IR brightening along with a change of the emission-line spectrum appearance and cooling of the star's photosphere. We present the object's V -band light curve, analyze the spectral variations, and compare the observed properties with those of other recognized Galactic LBVs, such as AG Car and HR Car. Overall we conclude the MWC 930 is a bona fide Galactic LBV that is currently in the middle of an S Dor cycle.",

author = "Miroshnichenko, {A. S.} and N. Manset and Zharikov, {S. V.} and J. Zsarg{\'o} and {Ju{\'a}rez Jim{\'e}nez}, {J. A.} and Groh, {J. H.} and H. Levato and M. Grosso and Rudy, {R. J.} and Laag, {E. A.} and Crawford, {K. B.} and Puetter, {R. C.} and Reichart, {D. E.} and Ivarsen, {K. M.} and Haislip, {J. B.} and Nysewander, {M. C.} and Lacluyze, {A. P.}",

year = "2014",

doi = "10.1155/2014/130378",

language = "Ingl{\'e}s",

volume = "2014",

journal = "Advances in Astronomy",

issn = "1687-7969",

}

Miroshnichenko, AS, Manset, N, Zharikov, SV, Zsargó, J, Juárez Jiménez, JA, Groh, JH, Levato, H, Grosso, M, Rudy, RJ, Laag, EA, Crawford, KB, Puetter, RC, Reichart, DE, Ivarsen, KM, Haislip, JB, Nysewander, MC & Lacluyze, AP 2014, 'Confirmation of the luminous blue variable status of MWC 930', Advances in Astronomy, vol. 2014, 130378. https://doi.org/10.1155/2014/130378

TY - JOUR

T1 - Confirmation of the luminous blue variable status of MWC 930

AU - Miroshnichenko, A. S.

AU - Manset, N.

AU - Zharikov, S. V.

AU - Zsargó, J.

AU - Juárez Jiménez, J. A.

AU - Groh, J. H.

AU - Levato, H.

AU - Grosso, M.

AU - Rudy, R. J.

AU - Laag, E. A.

AU - Crawford, K. B.

AU - Puetter, R. C.

AU - Reichart, D. E.

AU - Ivarsen, K. M.

AU - Haislip, J. B.

AU - Nysewander, M. C.

AU - Lacluyze, A. P.

PY - 2014

Y1 - 2014

N2 - We present spectroscopic and photometric observations of the emission-line star MWC 930 (V446 Sct) during its long-term optical brightening in 2006-2013. Based on our earlier data we suggested that the object has features found in Luminous Blue Variables (LBV), such as a high luminosity (3 105 L ȯ), a low wind terminal velocity (140 km s-1), and a tendency to show strong brightness variations ( 1 mag over 20 years). For the last 7 years it has been exhibiting a continuous optical and near-IR brightening along with a change of the emission-line spectrum appearance and cooling of the star's photosphere. We present the object's V -band light curve, analyze the spectral variations, and compare the observed properties with those of other recognized Galactic LBVs, such as AG Car and HR Car. Overall we conclude the MWC 930 is a bona fide Galactic LBV that is currently in the middle of an S Dor cycle.

AB - We present spectroscopic and photometric observations of the emission-line star MWC 930 (V446 Sct) during its long-term optical brightening in 2006-2013. Based on our earlier data we suggested that the object has features found in Luminous Blue Variables (LBV), such as a high luminosity (3 105 L ȯ), a low wind terminal velocity (140 km s-1), and a tendency to show strong brightness variations ( 1 mag over 20 years). For the last 7 years it has been exhibiting a continuous optical and near-IR brightening along with a change of the emission-line spectrum appearance and cooling of the star's photosphere. We present the object's V -band light curve, analyze the spectral variations, and compare the observed properties with those of other recognized Galactic LBVs, such as AG Car and HR Car. Overall we conclude the MWC 930 is a bona fide Galactic LBV that is currently in the middle of an S Dor cycle.

UR - http://www.scopus.com/inward/record.url?scp=84899554153&partnerID=8YFLogxK

U2 - 10.1155/2014/130378

DO - 10.1155/2014/130378

M3 - Artículo

SN - 1687-7969

VL - 2014

JO - Advances in Astronomy

JF - Advances in Astronomy

M1 - 130378

ER -

Confirmation of the luminous blue variable status of MWC 930

Abstract

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