Discovery and observations of ASASSN-13db, an EX lupi-type accretion event on a low-mass T tauri star

Thomas W.S. Holoien; Jose L. Prieto; K. Z. Stanek; C. S. Kochanek; B. J. Shappee; Z. Zhu; A. Sicilia-Aguilar; D. Grupe; K. Croxall; J. J. Adams; J. D. Simon; N. Morrell; S. M. McGraw; R. M. Wagner; U. Basu; J. F. Beacom; D. Bersier; J. Brimacombe; J. Jencson; G. Pojmanski; S. G. Starrfield; D. M. Szczygieł; C. E. Woodward

doi:10.1088/2041-8205/785/2/L35

Discovery and observations of ASASSN-13db, an EX lupi-type accretion event on a low-mass T tauri star

Thomas W.S. Holoien, Jose L. Prieto, K. Z. Stanek, C. S. Kochanek, B. J. Shappee, Z. Zhu, A. Sicilia-Aguilar, D. Grupe, K. Croxall, J. J. Adams, J. D. Simon, N. Morrell, S. M. McGraw, R. M. Wagner, U. Basu, J. F. Beacom, D. Bersier, J. Brimacombe, J. Jencson, G. PojmanskiS. G. Starrfield, D. M. Szczygieł, C. E. Woodward

Minnesota Institute for Astrophysics

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Abstract

We discuss ASASSN-13db, an EX Lupi-type ("EXor") accretion event on the young stellar object (YSO) SDSS J051011.01-032826.2 (hereafter SDSSJ0510) discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN). Using archival photometric data of SDSSJ0510 we construct a pre-outburst spectral energy distribution and find that it is consistent with a low-mass class II YSO near the Orion star forming region (d 420 pc). We present follow-up photometric and spectroscopic observations of the source after the ΔV -5.4 mag outburst that began in 2013 September and ended in early 2014. These data indicate an increase in temperature and luminosity consistent with an accretion rate of 10^-7 M yr ^-1, three or more orders of magnitude greater than in quiescence. Spectroscopic observations show a forest of narrow emission lines dominated by neutral metallic lines from Fe I and some low-ionization lines. The properties of ASASSN-13db are similar to those of the EXor prototype EX Lupi during its strongest observed outburst in late 2008.

Original language	English (US)
Article number	L35
Journal	Astrophysical Journal Letters
Volume	785
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/785/2/L35
State	Published - Apr 20 2014

Keywords

stars: activity
stars: individual (SDSS J051011.01-032826.2)
stars: pre-main sequence

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Holoien, T. W. S., Prieto, J. L., Stanek, K. Z., Kochanek, C. S., Shappee, B. J., Zhu, Z., Sicilia-Aguilar, A., Grupe, D., Croxall, K., Adams, J. J., Simon, J. D., Morrell, N., McGraw, S. M., Wagner, R. M., Basu, U., Beacom, J. F., Bersier, D., Brimacombe, J., Jencson, J., ... Woodward, C. E. (2014). Discovery and observations of ASASSN-13db, an EX lupi-type accretion event on a low-mass T tauri star. Astrophysical Journal Letters, 785(2), Article L35. https://doi.org/10.1088/2041-8205/785/2/L35

Holoien, TWS, Prieto, JL, Stanek, KZ, Kochanek, CS, Shappee, BJ, Zhu, Z, Sicilia-Aguilar, A, Grupe, D, Croxall, K, Adams, JJ, Simon, JD, Morrell, N, McGraw, SM, Wagner, RM, Basu, U, Beacom, JF, Bersier, D, Brimacombe, J, Jencson, J, Pojmanski, G, Starrfield, SG, Szczygieł, DM & Woodward, CE 2014, 'Discovery and observations of ASASSN-13db, an EX lupi-type accretion event on a low-mass T tauri star', Astrophysical Journal Letters, vol. 785, no. 2, L35. https://doi.org/10.1088/2041-8205/785/2/L35

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title = "Discovery and observations of ASASSN-13db, an EX lupi-type accretion event on a low-mass T tauri star",

abstract = "We discuss ASASSN-13db, an EX Lupi-type ({"}EXor{"}) accretion event on the young stellar object (YSO) SDSS J051011.01-032826.2 (hereafter SDSSJ0510) discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN). Using archival photometric data of SDSSJ0510 we construct a pre-outburst spectral energy distribution and find that it is consistent with a low-mass class II YSO near the Orion star forming region (d 420 pc). We present follow-up photometric and spectroscopic observations of the source after the ΔV -5.4 mag outburst that began in 2013 September and ended in early 2014. These data indicate an increase in temperature and luminosity consistent with an accretion rate of 10-7 M yr -1, three or more orders of magnitude greater than in quiescence. Spectroscopic observations show a forest of narrow emission lines dominated by neutral metallic lines from Fe I and some low-ionization lines. The properties of ASASSN-13db are similar to those of the EXor prototype EX Lupi during its strongest observed outburst in late 2008.",

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author = "Holoien, {Thomas W.S.} and Prieto, {Jose L.} and Stanek, {K. Z.} and Kochanek, {C. S.} and Shappee, {B. J.} and Z. Zhu and A. Sicilia-Aguilar and D. Grupe and K. Croxall and Adams, {J. J.} and Simon, {J. D.} and N. Morrell and McGraw, {S. M.} and Wagner, {R. M.} and U. Basu and Beacom, {J. F.} and D. Bersier and J. Brimacombe and J. Jencson and G. Pojmanski and Starrfield, {S. G.} and Szczygie{\l}, {D. M.} and Woodward, {C. E.}",

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T1 - Discovery and observations of ASASSN-13db, an EX lupi-type accretion event on a low-mass T tauri star

AU - Holoien, Thomas W.S.

AU - Prieto, Jose L.

AU - Stanek, K. Z.

AU - Kochanek, C. S.

AU - Shappee, B. J.

AU - Zhu, Z.

AU - Sicilia-Aguilar, A.

AU - Grupe, D.

AU - Croxall, K.

AU - Adams, J. J.

AU - Simon, J. D.

AU - Morrell, N.

AU - McGraw, S. M.

AU - Wagner, R. M.

AU - Basu, U.

AU - Beacom, J. F.

AU - Bersier, D.

AU - Brimacombe, J.

AU - Jencson, J.

AU - Pojmanski, G.

AU - Starrfield, S. G.

AU - Szczygieł, D. M.

AU - Woodward, C. E.

PY - 2014/4/20

Y1 - 2014/4/20

N2 - We discuss ASASSN-13db, an EX Lupi-type ("EXor") accretion event on the young stellar object (YSO) SDSS J051011.01-032826.2 (hereafter SDSSJ0510) discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN). Using archival photometric data of SDSSJ0510 we construct a pre-outburst spectral energy distribution and find that it is consistent with a low-mass class II YSO near the Orion star forming region (d 420 pc). We present follow-up photometric and spectroscopic observations of the source after the ΔV -5.4 mag outburst that began in 2013 September and ended in early 2014. These data indicate an increase in temperature and luminosity consistent with an accretion rate of 10-7 M yr -1, three or more orders of magnitude greater than in quiescence. Spectroscopic observations show a forest of narrow emission lines dominated by neutral metallic lines from Fe I and some low-ionization lines. The properties of ASASSN-13db are similar to those of the EXor prototype EX Lupi during its strongest observed outburst in late 2008.

AB - We discuss ASASSN-13db, an EX Lupi-type ("EXor") accretion event on the young stellar object (YSO) SDSS J051011.01-032826.2 (hereafter SDSSJ0510) discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN). Using archival photometric data of SDSSJ0510 we construct a pre-outburst spectral energy distribution and find that it is consistent with a low-mass class II YSO near the Orion star forming region (d 420 pc). We present follow-up photometric and spectroscopic observations of the source after the ΔV -5.4 mag outburst that began in 2013 September and ended in early 2014. These data indicate an increase in temperature and luminosity consistent with an accretion rate of 10-7 M yr -1, three or more orders of magnitude greater than in quiescence. Spectroscopic observations show a forest of narrow emission lines dominated by neutral metallic lines from Fe I and some low-ionization lines. The properties of ASASSN-13db are similar to those of the EXor prototype EX Lupi during its strongest observed outburst in late 2008.

KW - stars: activity

KW - stars: individual (SDSS J051011.01-032826.2)

KW - stars: pre-main sequence

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DO - 10.1088/2041-8205/785/2/L35

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AN - SCOPUS:84898422830

SN - 2041-8205

VL - 785

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L35

ER -

Discovery and observations of ASASSN-13db, an EX lupi-type accretion event on a low-mass T tauri star

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