COUP sees PMS coronae rotate!

E. Flaccomio, G. Micela, F. R. Harnden, S. Sciortino, S. Wolk, W. Herbst, F. Favata, Eric Feigelson

Research output: Contribution to journalConference article

Abstract

We present a novel results of the Chandra Orion Ultradeep Project (COUP): the detection of rotational modulation of X-ray emission from the Orion Nebula Cluster (ONC) young stars. This result is made possible by the exceptional length of the COUP observation: 10 days of ACIS integration during a time span of 13 days. We apply the Lomb Periodogram method to the X-ray light curves; comparing the thus derived rotational periods with published optically determined periods, we find evidence that the two are related. Rotational modulation is often observed in stars with saturated activity levels, indicating a substantial non homogeneity in the spatial distribution of active regions on these stars. This suggests that saturation is not due to the filling of the stellar surface with active regions.

Original languageEnglish (US)
Pages (from-to)539-542
Number of pages4
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number560 I
StatePublished - Aug 29 2005
Event13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - Hamburg, Germany
Duration: Jul 5 2004Jul 9 2004

Fingerprint

coronas
Stars
corona
stars
Modulation
homogeneity
Orion nebula
modulation
X rays
saturation
spatial distribution
Spatial distribution
light curve
inhomogeneity
x rays
project
detection
method
young

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

Cite this

Flaccomio, E., Micela, G., Harnden, F. R., Sciortino, S., Wolk, S., Herbst, W., ... Feigelson, E. (2005). COUP sees PMS coronae rotate! European Space Agency, (Special Publication) ESA SP, (560 I), 539-542.
Flaccomio, E. ; Micela, G. ; Harnden, F. R. ; Sciortino, S. ; Wolk, S. ; Herbst, W. ; Favata, F. ; Feigelson, Eric. / COUP sees PMS coronae rotate!. In: European Space Agency, (Special Publication) ESA SP. 2005 ; No. 560 I. pp. 539-542.
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abstract = "We present a novel results of the Chandra Orion Ultradeep Project (COUP): the detection of rotational modulation of X-ray emission from the Orion Nebula Cluster (ONC) young stars. This result is made possible by the exceptional length of the COUP observation: 10 days of ACIS integration during a time span of 13 days. We apply the Lomb Periodogram method to the X-ray light curves; comparing the thus derived rotational periods with published optically determined periods, we find evidence that the two are related. Rotational modulation is often observed in stars with saturated activity levels, indicating a substantial non homogeneity in the spatial distribution of active regions on these stars. This suggests that saturation is not due to the filling of the stellar surface with active regions.",
author = "E. Flaccomio and G. Micela and Harnden, {F. R.} and S. Sciortino and S. Wolk and W. Herbst and F. Favata and Eric Feigelson",
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Flaccomio, E, Micela, G, Harnden, FR, Sciortino, S, Wolk, S, Herbst, W, Favata, F & Feigelson, E 2005, 'COUP sees PMS coronae rotate!', European Space Agency, (Special Publication) ESA SP, no. 560 I, pp. 539-542.

COUP sees PMS coronae rotate! / Flaccomio, E.; Micela, G.; Harnden, F. R.; Sciortino, S.; Wolk, S.; Herbst, W.; Favata, F.; Feigelson, Eric.

In: European Space Agency, (Special Publication) ESA SP, No. 560 I, 29.08.2005, p. 539-542.

Research output: Contribution to journalConference article

TY - JOUR

T1 - COUP sees PMS coronae rotate!

AU - Flaccomio, E.

AU - Micela, G.

AU - Harnden, F. R.

AU - Sciortino, S.

AU - Wolk, S.

AU - Herbst, W.

AU - Favata, F.

AU - Feigelson, Eric

PY - 2005/8/29

Y1 - 2005/8/29

N2 - We present a novel results of the Chandra Orion Ultradeep Project (COUP): the detection of rotational modulation of X-ray emission from the Orion Nebula Cluster (ONC) young stars. This result is made possible by the exceptional length of the COUP observation: 10 days of ACIS integration during a time span of 13 days. We apply the Lomb Periodogram method to the X-ray light curves; comparing the thus derived rotational periods with published optically determined periods, we find evidence that the two are related. Rotational modulation is often observed in stars with saturated activity levels, indicating a substantial non homogeneity in the spatial distribution of active regions on these stars. This suggests that saturation is not due to the filling of the stellar surface with active regions.

AB - We present a novel results of the Chandra Orion Ultradeep Project (COUP): the detection of rotational modulation of X-ray emission from the Orion Nebula Cluster (ONC) young stars. This result is made possible by the exceptional length of the COUP observation: 10 days of ACIS integration during a time span of 13 days. We apply the Lomb Periodogram method to the X-ray light curves; comparing the thus derived rotational periods with published optically determined periods, we find evidence that the two are related. Rotational modulation is often observed in stars with saturated activity levels, indicating a substantial non homogeneity in the spatial distribution of active regions on these stars. This suggests that saturation is not due to the filling of the stellar surface with active regions.

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M3 - Conference article

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Flaccomio E, Micela G, Harnden FR, Sciortino S, Wolk S, Herbst W et al. COUP sees PMS coronae rotate! European Space Agency, (Special Publication) ESA SP. 2005 Aug 29;(560 I):539-542.