Inner disc rearrangement revealed by dramatic brightness variations in the young star PVCep

M. Kun, E. Szegedi-Elek, A. Moór, Á Kóspál, P. Ábrahám, D. Apai, Z. T. Kiss, P. Klagyivik, T. Yu Magakian, Gy Mezo, T. A. Movsessian, A. Pál, M. Rácz, J. Rogers

Research output: Article

14 Citations (Scopus)

Abstract

Young Sun-like stars at the beginning of the pre-main-sequence (PMS) evolution are surrounded by accretion discs and remnant protostellar envelopes. Photometric and spectroscopic variations of these stars are driven by interactions of the star with the disc. Time-scales and wavelength dependence of the variability carry information on the physical mechanisms behind these interactions. We conducted multi-epoch, multiwavelength study of PVCep, a strongly variable, accreting PMS star. By combining our own observations from 2004 to 2010 with archival and literature data, we show that PVCep started a spectacular fading in 2005, reaching an IC-band amplitude of 4mag. Analysis of variation of the optical and infrared fluxes, colour indices and emission line fluxes suggests that the photometric decline in 2005-2009 resulted from an interplay between variable accretion and circumstellar extinction: since the central luminosity of the system is dominated by accretion, a modest drop in the accretion rate could induce the drastic restructuring of the inner disc. Dust condensation in the inner disc region might have resulted in the enhancement of the circumstellar extinction.

Original languageEnglish
Pages (from-to)2689-2695
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume413
Issue number4
DOIs
Publication statusPublished - jún. 2011

Fingerprint

brightness
accretion
stars
extinction
pre-main sequence stars
variable stars
fading
accretion disks
sun
envelopes
condensation
dust
luminosity
time measurement
interactions
color
augmentation
wavelength
timescale
wavelengths

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Inner disc rearrangement revealed by dramatic brightness variations in the young star PVCep. / Kun, M.; Szegedi-Elek, E.; Moór, A.; Kóspál, Á; Ábrahám, P.; Apai, D.; Kiss, Z. T.; Klagyivik, P.; Magakian, T. Yu; Mezo, Gy; Movsessian, T. A.; Pál, A.; Rácz, M.; Rogers, J.

In: Monthly Notices of the Royal Astronomical Society, Vol. 413, No. 4, 06.2011, p. 2689-2695.

Research output: Article

Kun, M, Szegedi-Elek, E, Moór, A, Kóspál, Á, Ábrahám, P, Apai, D, Kiss, ZT, Klagyivik, P, Magakian, TY, Mezo, G, Movsessian, TA, Pál, A, Rácz, M & Rogers, J 2011, 'Inner disc rearrangement revealed by dramatic brightness variations in the young star PVCep', Monthly Notices of the Royal Astronomical Society, vol. 413, no. 4, pp. 2689-2695. https://doi.org/10.1111/j.1365-2966.2011.18341.x
Kun, M. ; Szegedi-Elek, E. ; Moór, A. ; Kóspál, Á ; Ábrahám, P. ; Apai, D. ; Kiss, Z. T. ; Klagyivik, P. ; Magakian, T. Yu ; Mezo, Gy ; Movsessian, T. A. ; Pál, A. ; Rácz, M. ; Rogers, J. / Inner disc rearrangement revealed by dramatic brightness variations in the young star PVCep. In: Monthly Notices of the Royal Astronomical Society. 2011 ; Vol. 413, No. 4. pp. 2689-2695.
@article{fdf81ace9b334a8488bdc06b03052797,
title = "Inner disc rearrangement revealed by dramatic brightness variations in the young star PVCep",
abstract = "Young Sun-like stars at the beginning of the pre-main-sequence (PMS) evolution are surrounded by accretion discs and remnant protostellar envelopes. Photometric and spectroscopic variations of these stars are driven by interactions of the star with the disc. Time-scales and wavelength dependence of the variability carry information on the physical mechanisms behind these interactions. We conducted multi-epoch, multiwavelength study of PVCep, a strongly variable, accreting PMS star. By combining our own observations from 2004 to 2010 with archival and literature data, we show that PVCep started a spectacular fading in 2005, reaching an IC-band amplitude of 4mag. Analysis of variation of the optical and infrared fluxes, colour indices and emission line fluxes suggests that the photometric decline in 2005-2009 resulted from an interplay between variable accretion and circumstellar extinction: since the central luminosity of the system is dominated by accretion, a modest drop in the accretion rate could induce the drastic restructuring of the inner disc. Dust condensation in the inner disc region might have resulted in the enhancement of the circumstellar extinction.",
keywords = "Stars: formation, Stars: individual: PVCep, Stars: pre-main-sequence",
author = "M. Kun and E. Szegedi-Elek and A. Mo{\'o}r and {\'A} K{\'o}sp{\'a}l and P. {\'A}brah{\'a}m and D. Apai and Kiss, {Z. T.} and P. Klagyivik and Magakian, {T. Yu} and Gy Mezo and Movsessian, {T. A.} and A. P{\'a}l and M. R{\'a}cz and J. Rogers",
year = "2011",
month = "6",
doi = "10.1111/j.1365-2966.2011.18341.x",
language = "English",
volume = "413",
pages = "2689--2695",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",

}

TY - JOUR

T1 - Inner disc rearrangement revealed by dramatic brightness variations in the young star PVCep

AU - Kun, M.

AU - Szegedi-Elek, E.

AU - Moór, A.

AU - Kóspál, Á

AU - Ábrahám, P.

AU - Apai, D.

AU - Kiss, Z. T.

AU - Klagyivik, P.

AU - Magakian, T. Yu

AU - Mezo, Gy

AU - Movsessian, T. A.

AU - Pál, A.

AU - Rácz, M.

AU - Rogers, J.

PY - 2011/6

Y1 - 2011/6

N2 - Young Sun-like stars at the beginning of the pre-main-sequence (PMS) evolution are surrounded by accretion discs and remnant protostellar envelopes. Photometric and spectroscopic variations of these stars are driven by interactions of the star with the disc. Time-scales and wavelength dependence of the variability carry information on the physical mechanisms behind these interactions. We conducted multi-epoch, multiwavelength study of PVCep, a strongly variable, accreting PMS star. By combining our own observations from 2004 to 2010 with archival and literature data, we show that PVCep started a spectacular fading in 2005, reaching an IC-band amplitude of 4mag. Analysis of variation of the optical and infrared fluxes, colour indices and emission line fluxes suggests that the photometric decline in 2005-2009 resulted from an interplay between variable accretion and circumstellar extinction: since the central luminosity of the system is dominated by accretion, a modest drop in the accretion rate could induce the drastic restructuring of the inner disc. Dust condensation in the inner disc region might have resulted in the enhancement of the circumstellar extinction.

AB - Young Sun-like stars at the beginning of the pre-main-sequence (PMS) evolution are surrounded by accretion discs and remnant protostellar envelopes. Photometric and spectroscopic variations of these stars are driven by interactions of the star with the disc. Time-scales and wavelength dependence of the variability carry information on the physical mechanisms behind these interactions. We conducted multi-epoch, multiwavelength study of PVCep, a strongly variable, accreting PMS star. By combining our own observations from 2004 to 2010 with archival and literature data, we show that PVCep started a spectacular fading in 2005, reaching an IC-band amplitude of 4mag. Analysis of variation of the optical and infrared fluxes, colour indices and emission line fluxes suggests that the photometric decline in 2005-2009 resulted from an interplay between variable accretion and circumstellar extinction: since the central luminosity of the system is dominated by accretion, a modest drop in the accretion rate could induce the drastic restructuring of the inner disc. Dust condensation in the inner disc region might have resulted in the enhancement of the circumstellar extinction.

KW - Stars: formation

KW - Stars: individual: PVCep

KW - Stars: pre-main-sequence

UR - http://www.scopus.com/inward/record.url?scp=79956189433&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79956189433&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2966.2011.18341.x

DO - 10.1111/j.1365-2966.2011.18341.x

M3 - Article

AN - SCOPUS:79956189433

VL - 413

SP - 2689

EP - 2695

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -