GSC 07396-00759 = V4046 Sgr C[D]: A Wide-separation Companion to the Close T Tauri Binary System V4046 Sgr AB

Costanza Argiroffi, Montez, Argiroffi, Huenemoerder, Audard, Güdel, Hussain, Bouvier, Gregory, Alecian, Sacco, Antonio Maggio, Kastner, Damiani, Donati, Montmerle, Shi

Risultato della ricerca: Article

17 Citazioni (Scopus)

Abstract

We explore the possibility that GSC 07396-00759 (spectral type M1e) is a widely separated (~2farcm82, or projected separation ~12,350 AU) companion to the "old" (age ~12 Myr) classical T Tauri binary system V4046 Sgr AB, as suggested by the proximity and similar space motions of the two systems. If the two systems are equidistant and coeval, then GSC 07396-00759, like V4046 Sgr AB, must be a spectroscopic binary with nearly equal-mass components, and V4046 Sgr must be at least ~8 Myr old. Analysis of a serendipitous Chandra X-ray grating spectrum and light curve as well as XMM-Newton light curves and CCD spectra of GSC 07396-00759 obtained during long exposures targeting V4046 Sgr AB reveals a relatively hard (TX ~ 107 K) X-ray spectrum, strong flaring, and relatively low-density plasma. These X-ray characteristics of GCS 07396-00759 are indicative of a high level of coronal activity, consistent with its apparent weak-lined T Tauri star status. Interactions between V4046 Sgr AB and GCS 07396-00759 when the two systems were more closely bound may be responsible for (1) their dissolution ~106 yr ago, (2) the present tight, circular orbit of V4046 Sgr AB, and (3) the persistence of the gaseous circumbinary disk still orbiting V4046 Sgr AB.
Lingua originaleEnglish
pagine (da-a)-
Numero di pagine6
RivistaTHE ASTROPHYSICAL JOURNAL LETTERS
Volume740
Stato di pubblicazionePublished - 2011

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light curve
x rays
T Tauri stars
circular orbits
XMM-Newton telescope
gratings (spectra)
newton
plasma density
targeting
proximity
charge coupled devices
dissolving
persistence
dissolution
plasma
curves
interactions
flaring
exposure
analysis

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cita questo

GSC 07396-00759 = V4046 Sgr C[D]: A Wide-separation Companion to the Close T Tauri Binary System V4046 Sgr AB. / Argiroffi, Costanza; Montez; Argiroffi; Huenemoerder; Audard; Güdel; Hussain; Bouvier; Gregory; Alecian; Sacco; Maggio, Antonio; Kastner; Damiani; Donati; Montmerle; Shi.

In: THE ASTROPHYSICAL JOURNAL LETTERS, Vol. 740, 2011, pag. -.

Risultato della ricerca: Article

Argiroffi, C, Montez, Argiroffi, Huenemoerder, Audard, Güdel, Hussain, Bouvier, Gregory, Alecian, Sacco, Maggio, A, Kastner, Damiani, Donati, Montmerle & Shi 2011, 'GSC 07396-00759 = V4046 Sgr C[D]: A Wide-separation Companion to the Close T Tauri Binary System V4046 Sgr AB', THE ASTROPHYSICAL JOURNAL LETTERS, vol. 740, pagg. -.
Argiroffi, Costanza ; Montez ; Argiroffi ; Huenemoerder ; Audard ; Güdel ; Hussain ; Bouvier ; Gregory ; Alecian ; Sacco ; Maggio, Antonio ; Kastner ; Damiani ; Donati ; Montmerle ; Shi. / GSC 07396-00759 = V4046 Sgr C[D]: A Wide-separation Companion to the Close T Tauri Binary System V4046 Sgr AB. In: THE ASTROPHYSICAL JOURNAL LETTERS. 2011 ; Vol. 740. pagg. -.
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abstract = "We explore the possibility that GSC 07396-00759 (spectral type M1e) is a widely separated (~2farcm82, or projected separation ~12,350 AU) companion to the {"}old{"} (age ~12 Myr) classical T Tauri binary system V4046 Sgr AB, as suggested by the proximity and similar space motions of the two systems. If the two systems are equidistant and coeval, then GSC 07396-00759, like V4046 Sgr AB, must be a spectroscopic binary with nearly equal-mass components, and V4046 Sgr must be at least ~8 Myr old. Analysis of a serendipitous Chandra X-ray grating spectrum and light curve as well as XMM-Newton light curves and CCD spectra of GSC 07396-00759 obtained during long exposures targeting V4046 Sgr AB reveals a relatively hard (TX ~ 107 K) X-ray spectrum, strong flaring, and relatively low-density plasma. These X-ray characteristics of GCS 07396-00759 are indicative of a high level of coronal activity, consistent with its apparent weak-lined T Tauri star status. Interactions between V4046 Sgr AB and GCS 07396-00759 when the two systems were more closely bound may be responsible for (1) their dissolution ~106 yr ago, (2) the present tight, circular orbit of V4046 Sgr AB, and (3) the persistence of the gaseous circumbinary disk still orbiting V4046 Sgr AB.",
author = "Costanza Argiroffi and Montez and Argiroffi and Huenemoerder and Audard and G{\"u}del and Hussain and Bouvier and Gregory and Alecian and Sacco and Antonio Maggio and Kastner and Damiani and Donati and Montmerle and Shi",
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TY - JOUR

T1 - GSC 07396-00759 = V4046 Sgr C[D]: A Wide-separation Companion to the Close T Tauri Binary System V4046 Sgr AB

AU - Argiroffi, Costanza

AU - Montez, null

AU - Argiroffi, null

AU - Huenemoerder, null

AU - Audard, null

AU - Güdel, null

AU - Hussain, null

AU - Bouvier, null

AU - Gregory, null

AU - Alecian, null

AU - Sacco, null

AU - Maggio, Antonio

AU - Kastner, null

AU - Damiani, null

AU - Donati, null

AU - Montmerle, null

AU - Shi, null

PY - 2011

Y1 - 2011

N2 - We explore the possibility that GSC 07396-00759 (spectral type M1e) is a widely separated (~2farcm82, or projected separation ~12,350 AU) companion to the "old" (age ~12 Myr) classical T Tauri binary system V4046 Sgr AB, as suggested by the proximity and similar space motions of the two systems. If the two systems are equidistant and coeval, then GSC 07396-00759, like V4046 Sgr AB, must be a spectroscopic binary with nearly equal-mass components, and V4046 Sgr must be at least ~8 Myr old. Analysis of a serendipitous Chandra X-ray grating spectrum and light curve as well as XMM-Newton light curves and CCD spectra of GSC 07396-00759 obtained during long exposures targeting V4046 Sgr AB reveals a relatively hard (TX ~ 107 K) X-ray spectrum, strong flaring, and relatively low-density plasma. These X-ray characteristics of GCS 07396-00759 are indicative of a high level of coronal activity, consistent with its apparent weak-lined T Tauri star status. Interactions between V4046 Sgr AB and GCS 07396-00759 when the two systems were more closely bound may be responsible for (1) their dissolution ~106 yr ago, (2) the present tight, circular orbit of V4046 Sgr AB, and (3) the persistence of the gaseous circumbinary disk still orbiting V4046 Sgr AB.

AB - We explore the possibility that GSC 07396-00759 (spectral type M1e) is a widely separated (~2farcm82, or projected separation ~12,350 AU) companion to the "old" (age ~12 Myr) classical T Tauri binary system V4046 Sgr AB, as suggested by the proximity and similar space motions of the two systems. If the two systems are equidistant and coeval, then GSC 07396-00759, like V4046 Sgr AB, must be a spectroscopic binary with nearly equal-mass components, and V4046 Sgr must be at least ~8 Myr old. Analysis of a serendipitous Chandra X-ray grating spectrum and light curve as well as XMM-Newton light curves and CCD spectra of GSC 07396-00759 obtained during long exposures targeting V4046 Sgr AB reveals a relatively hard (TX ~ 107 K) X-ray spectrum, strong flaring, and relatively low-density plasma. These X-ray characteristics of GCS 07396-00759 are indicative of a high level of coronal activity, consistent with its apparent weak-lined T Tauri star status. Interactions between V4046 Sgr AB and GCS 07396-00759 when the two systems were more closely bound may be responsible for (1) their dissolution ~106 yr ago, (2) the present tight, circular orbit of V4046 Sgr AB, and (3) the persistence of the gaseous circumbinary disk still orbiting V4046 Sgr AB.

UR - http://hdl.handle.net/10447/65341

UR - http://iopscience.iop.org/2041-8205/740/1/L17/

M3 - Article

VL - 740

SP - -

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

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