The iue mega campaign: Wind variability and rotation in early-type stars

D. Massa; A. W. Fullerton; J. S. Nichols; S. P. Owocki; R. K. Prinja; N. St-Louis; A. J. Willis; B. Altner; C. T. Bolton; J. P. Cassinelli; D. Cohen; R. G. Cooper; A. Feldmeier; K. G. Gayley; T. Harries; S. R. Heap; R. N. Henriksen; I. D. Howarth; I. Hubeny; E. Kambe; L. Kaper; G. Koenigsberger; S. Marchenko; S. R. McCandliss; A. F.J. Moffat; T. Nugis; J. Puls; C. Robert; R. E. Schulte-Ladbeck; L. J. Smith; M. A. Smith; W. L. Waldron; R. L. White

doi:10.1086/309707

The iue mega campaign: Wind variability and rotation in early-type stars

D. Massa, A. W. Fullerton, J. S. Nichols, S. P. Owocki, R. K. Prinja, N. St-Louis, A. J. Willis, B. Altner, C. T. Bolton, J. P. Cassinelli, D. Cohen, R. G. Cooper, A. Feldmeier, K. G. Gayley, T. Harries, S. R. Heap, R. N. Henriksen, I. D. Howarth, I. Hubeny, E. KambeL. Kaper, G. Koenigsberger, S. Marchenko, S. R. McCandliss, A. F.J. Moffat, T. Nugis, J. Puls, C. Robert, R. E. Schulte-Ladbeck, L. J. Smith, M. A. Smith, W. L. Waldron, R. L. White

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

95 Scopus citations

Abstract

Wind variability in OB stars may be ubiquitous, and a connection between projected stellar rotation velocity and wind activity is well established. However, the origin of this connection is unknown. To probe the nature of the rotation connection, several of the attendees at the workshop on Instability and Variability of Hot-Star Winds drafted an IUE observing proposal. The goal of this program was to follow three stars for several rotations to determine whether the rotation connection is correlative or causal. The stars selected for monitoring all have rotation periods <5 days. They were HD 50896 (WN5), HD 64760 (B0.5 Ib), and HD 66811 Pup; O4 If(n)]. During 16 days of nearly continuous observations in 1995 January (dubbed the ‘‘MEGA’’ campaign), 444 high-dispersion IUE spectra of these stars were obtained. This Letter presents an overview of the results of the MEGA campaign and provides an introduction to the three following Letters, which discuss the results for each star.

Original language	English (US)
Pages (from-to)	L53-L55
Journal	Astrophysical Journal
Volume	452
Issue number	1
DOIs	https://doi.org/10.1086/309707
State	Published - Oct 10 1995
Externally published	Yes

Keywords

Stars: Activity
Stars: Early-type
Stars: Mass loss
Ultraviolet: Stars

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/309707

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Massa, D., Fullerton, A. W., Nichols, J. S., Owocki, S. P., Prinja, R. K., St-Louis, N., Willis, A. J., Altner, B., Bolton, C. T., Cassinelli, J. P., Cohen, D., Cooper, R. G., Feldmeier, A., Gayley, K. G., Harries, T., Heap, S. R., Henriksen, R. N., Howarth, I. D., Hubeny, I., ... White, R. L. (1995). The iue mega campaign: Wind variability and rotation in early-type stars. Astrophysical Journal, 452(1), L53-L55. https://doi.org/10.1086/309707

Massa, D, Fullerton, AW, Nichols, JS, Owocki, SP, Prinja, RK, St-Louis, N, Willis, AJ, Altner, B, Bolton, CT, Cassinelli, JP, Cohen, D, Cooper, RG, Feldmeier, A, Gayley, KG, Harries, T, Heap, SR, Henriksen, RN, Howarth, ID, Hubeny, I, Kambe, E, Kaper, L, Koenigsberger, G, Marchenko, S, McCandliss, SR, Moffat, AFJ, Nugis, T, Puls, J, Robert, C, Schulte-Ladbeck, RE, Smith, LJ, Smith, MA, Waldron, WL & White, RL 1995, 'The iue mega campaign: Wind variability and rotation in early-type stars', Astrophysical Journal, vol. 452, no. 1, pp. L53-L55. https://doi.org/10.1086/309707

@article{224477f4e9c449399b8a127417f0f027,

title = "The iue mega campaign: Wind variability and rotation in early-type stars",

abstract = "Wind variability in OB stars may be ubiquitous, and a connection between projected stellar rotation velocity and wind activity is well established. However, the origin of this connection is unknown. To probe the nature of the rotation connection, several of the attendees at the workshop on Instability and Variability of Hot-Star Winds drafted an IUE observing proposal. The goal of this program was to follow three stars for several rotations to determine whether the rotation connection is correlative or causal. The stars selected for monitoring all have rotation periods <5 days. They were HD 50896 (WN5), HD 64760 (B0.5 Ib), and HD 66811 Pup; O4 If(n)]. During 16 days of nearly continuous observations in 1995 January (dubbed the {\textquoteleft}{\textquoteleft}MEGA{\textquoteright}{\textquoteright} campaign), 444 high-dispersion IUE spectra of these stars were obtained. This Letter presents an overview of the results of the MEGA campaign and provides an introduction to the three following Letters, which discuss the results for each star.",

keywords = "Stars: Activity, Stars: Early-type, Stars: Mass loss, Ultraviolet: Stars",

author = "D. Massa and Fullerton, {A. W.} and Nichols, {J. S.} and Owocki, {S. P.} and Prinja, {R. K.} and N. St-Louis and Willis, {A. J.} and B. Altner and Bolton, {C. T.} and Cassinelli, {J. P.} and D. Cohen and Cooper, {R. G.} and A. Feldmeier and Gayley, {K. G.} and T. Harries and Heap, {S. R.} and Henriksen, {R. N.} and Howarth, {I. D.} and I. Hubeny and E. Kambe and L. Kaper and G. Koenigsberger and S. Marchenko and McCandliss, {S. R.} and Moffat, {A. F.J.} and T. Nugis and J. Puls and C. Robert and Schulte-Ladbeck, {R. E.} and Smith, {L. J.} and Smith, {M. A.} and Waldron, {W. L.} and White, {R. L.}",

note = "Funding Information: A debt of gratitude is owed to the IUE staffs at both the GSFC and VILSPA facilities since almost all of the observing was done in service mode and to the US and European telescope allocation committees for allotting us such a large block of time. D. M. acknowledges financial support from NASA grant NAS5-32782.",

year = "1995",

month = oct,

day = "10",

doi = "10.1086/309707",

language = "English (US)",

volume = "452",

pages = "L53--L55",

journal = "Astrophysical Journal",

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TY - JOUR

T1 - The iue mega campaign

T2 - Wind variability and rotation in early-type stars

AU - Massa, D.

AU - Fullerton, A. W.

AU - Nichols, J. S.

AU - Owocki, S. P.

AU - Prinja, R. K.

AU - St-Louis, N.

AU - Willis, A. J.

AU - Altner, B.

AU - Bolton, C. T.

AU - Cassinelli, J. P.

AU - Cohen, D.

AU - Cooper, R. G.

AU - Feldmeier, A.

AU - Gayley, K. G.

AU - Harries, T.

AU - Heap, S. R.

AU - Henriksen, R. N.

AU - Howarth, I. D.

AU - Hubeny, I.

AU - Kambe, E.

AU - Kaper, L.

AU - Koenigsberger, G.

AU - Marchenko, S.

AU - McCandliss, S. R.

AU - Moffat, A. F.J.

AU - Nugis, T.

AU - Puls, J.

AU - Robert, C.

AU - Schulte-Ladbeck, R. E.

AU - Smith, L. J.

AU - Smith, M. A.

AU - Waldron, W. L.

AU - White, R. L.

N1 - Funding Information: A debt of gratitude is owed to the IUE staffs at both the GSFC and VILSPA facilities since almost all of the observing was done in service mode and to the US and European telescope allocation committees for allotting us such a large block of time. D. M. acknowledges financial support from NASA grant NAS5-32782.

PY - 1995/10/10

Y1 - 1995/10/10

N2 - Wind variability in OB stars may be ubiquitous, and a connection between projected stellar rotation velocity and wind activity is well established. However, the origin of this connection is unknown. To probe the nature of the rotation connection, several of the attendees at the workshop on Instability and Variability of Hot-Star Winds drafted an IUE observing proposal. The goal of this program was to follow three stars for several rotations to determine whether the rotation connection is correlative or causal. The stars selected for monitoring all have rotation periods <5 days. They were HD 50896 (WN5), HD 64760 (B0.5 Ib), and HD 66811 Pup; O4 If(n)]. During 16 days of nearly continuous observations in 1995 January (dubbed the ‘‘MEGA’’ campaign), 444 high-dispersion IUE spectra of these stars were obtained. This Letter presents an overview of the results of the MEGA campaign and provides an introduction to the three following Letters, which discuss the results for each star.

AB - Wind variability in OB stars may be ubiquitous, and a connection between projected stellar rotation velocity and wind activity is well established. However, the origin of this connection is unknown. To probe the nature of the rotation connection, several of the attendees at the workshop on Instability and Variability of Hot-Star Winds drafted an IUE observing proposal. The goal of this program was to follow three stars for several rotations to determine whether the rotation connection is correlative or causal. The stars selected for monitoring all have rotation periods <5 days. They were HD 50896 (WN5), HD 64760 (B0.5 Ib), and HD 66811 Pup; O4 If(n)]. During 16 days of nearly continuous observations in 1995 January (dubbed the ‘‘MEGA’’ campaign), 444 high-dispersion IUE spectra of these stars were obtained. This Letter presents an overview of the results of the MEGA campaign and provides an introduction to the three following Letters, which discuss the results for each star.

KW - Stars: Activity

KW - Stars: Early-type

KW - Stars: Mass loss

KW - Ultraviolet: Stars

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DO - 10.1086/309707

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VL - 452

SP - L53-L55

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

The iue mega campaign: Wind variability and rotation in early-type stars

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