Using photometry to probe the circumstellar environment of δ scorpII

C. E. Jones; P. A. Wiegert; C. Tycner; G. W. Henry; R. P. Cyr; R. J. Halonen; M. W. Muterspaugh

doi:10.1088/0004-6256/145/5/142

Using photometry to probe the circumstellar environment of δ scorpII

C. E. Jones, P. A. Wiegert, C. Tycner, G. W. Henry, R. P. Cyr, R. J. Halonen, M. W. Muterspaugh

Physics

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6 Scopus citations

Abstract

We acquired Johnson BV photometry of the binary Be disk system δ Scorpii during its 2009, 2010, 2011, and 2012 observing seasons and used it to probe the innermost regions of the disk. We found that several disk building events have occurred during this time, resulting in an overall brightening in the V band and reddening of the system. In addition to these long-term trends, we found cyclical variability in each observing season on timescales between 60 and 100 days. We were able to reproduce the changes in the magnitude and color of δ Sco using our theoretical models and found that variable mass-loss rates in the range 2.5-7.0 × 10^-9 Myr^-1 over 35 days can reproduce the observed increase in brightness.

Original language	English
Article number	142
Journal	Astronomical Journal
Volume	145
Issue number	5
DOIs	https://doi.org/10.1088/0004-6256/145/5/142
State	Published - May 2013

Keywords

binaries: general
circumstellar matter
stars: emission-line, Be
stars: individual (delta Sco)
stars: mass-loss

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10.1088/0004-6256/145/5/142

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title = "Using photometry to probe the circumstellar environment of δ scorpII",

abstract = "We acquired Johnson BV photometry of the binary Be disk system δ Scorpii during its 2009, 2010, 2011, and 2012 observing seasons and used it to probe the innermost regions of the disk. We found that several disk building events have occurred during this time, resulting in an overall brightening in the V band and reddening of the system. In addition to these long-term trends, we found cyclical variability in each observing season on timescales between 60 and 100 days. We were able to reproduce the changes in the magnitude and color of δ Sco using our theoretical models and found that variable mass-loss rates in the range 2.5-7.0 × 10-9 Myr-1 over 35 days can reproduce the observed increase in brightness.",

keywords = "binaries: general, circumstellar matter, stars: emission-line, Be, stars: individual (delta Sco), stars: mass-loss",

author = "Jones, {C. E.} and Wiegert, {P. A.} and C. Tycner and Henry, {G. W.} and Cyr, {R. P.} and Halonen, {R. J.} and Muterspaugh, {M. W.}",

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T1 - Using photometry to probe the circumstellar environment of δ scorpII

AU - Jones, C. E.

AU - Wiegert, P. A.

AU - Tycner, C.

AU - Henry, G. W.

AU - Cyr, R. P.

AU - Halonen, R. J.

AU - Muterspaugh, M. W.

PY - 2013/5

Y1 - 2013/5

N2 - We acquired Johnson BV photometry of the binary Be disk system δ Scorpii during its 2009, 2010, 2011, and 2012 observing seasons and used it to probe the innermost regions of the disk. We found that several disk building events have occurred during this time, resulting in an overall brightening in the V band and reddening of the system. In addition to these long-term trends, we found cyclical variability in each observing season on timescales between 60 and 100 days. We were able to reproduce the changes in the magnitude and color of δ Sco using our theoretical models and found that variable mass-loss rates in the range 2.5-7.0 × 10-9 Myr-1 over 35 days can reproduce the observed increase in brightness.

AB - We acquired Johnson BV photometry of the binary Be disk system δ Scorpii during its 2009, 2010, 2011, and 2012 observing seasons and used it to probe the innermost regions of the disk. We found that several disk building events have occurred during this time, resulting in an overall brightening in the V band and reddening of the system. In addition to these long-term trends, we found cyclical variability in each observing season on timescales between 60 and 100 days. We were able to reproduce the changes in the magnitude and color of δ Sco using our theoretical models and found that variable mass-loss rates in the range 2.5-7.0 × 10-9 Myr-1 over 35 days can reproduce the observed increase in brightness.

KW - binaries: general

KW - circumstellar matter

KW - stars: emission-line, Be

KW - stars: individual (delta Sco)

KW - stars: mass-loss

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VL - 145

JO - Astronomical Journal

JF - Astronomical Journal

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ER -

Using photometry to probe the circumstellar environment of δ scorpII

Abstract

Keywords

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