Evidence for an FU orionis-like outburst from a classical T tauri star

Adam A. Miller, Lynne A. Hillenbrand, Kevin R. Covey, Dovi Poznanski, Jeffrey M. Silverman, Io K.W. Kleiser, Brbara Rojas-Ayala, Philip S. Muirhead, S. Bradley Cenko, Joshua S. Bloom, Mansi M. Kasliwal, Alexei V. Filippenko, Nicholas M. Law, Eran O. Ofek, Richard G. Dekany, Gustavo Rahmer, David Hale, Roger Smith, Robert M. Quimby, Peter NugentJanet Jacobsen, Jeff Zolkower, Viswa Velur, Richard Walters, John Henning, Khanh Bui, Dan McKenna, Shrinivas R. Kulkarni, Christopher R. Klein, Michael Kandrashoff, Alekzandir Morton

Resultado de la investigación: Article

60 Citas (Scopus)

Resumen

We present pre- and post-outburst observations of the new FU Orionis-like young stellar object PTF 10qpf (also known as LkHα 188-G4 and HBC 722). Prior to this outburst, LkHα 188-G4 was classified as a classical TTauri star (CTTS) on the basis of its optical emission-line spectrum superposed on a K8-type photosphere and its photometric variability. The mid-infrared spectral index of LkHα 188-G4 indicates a Class II-type object. LkHα 188-G4 exhibited a steady rise by 1mag over 11 months starting in August 2009, before a subsequent more abrupt rise of >3mag on a timescale of 2 months. Observations taken during the eruption exhibit the defining characteristics of FU Orionis variables: (1) an increase in brightness by ≳4mag, (2) a bright optical/near-infrared reflection nebula appeared, (3) optical spectra are consistent with a G supergiant and dominated by absorption lines, the only exception being Hα which is characterized by a P Cygni profile, (4) near-infrared spectra resemble those of late K-M giants/supergiants with enhanced absorption seen in the molecular bands of CO and H2O, and (5) outflow signatures in H and He are seen in the form of blueshifted absorption profiles. LkHα 188-G4 is the first member of the FU Orionis-like class with a well-sampled optical to mid-infrared spectral energy distribution in the pre-outburst phase. The association of the PTF 10qpf outburst with the previously identified CTTS LkHα 188-G4 (HBC 722) provides strong evidence that FU Orionis-like eruptions represent periods of enhanced disk accretion and outflow, likely triggered by instabilities in the disk. The early identification of PTF 10qpf as an FU Orionis-like variable will enable detailed photometric and spectroscopic observations during its post-outburst evolution for comparison with other known outbursting objects.

Idioma originalEnglish
Número de artículo80
PublicaciónAstrophysical Journal
Volumen730
N.º2
DOI
EstadoPublished - 1 abr 2011

Huella dactilar

T Tauri stars
outburst
volcanic eruptions
reflection nebulae
stars
infrared reflection
photosphere
profiles
spectral energy distribution
accretion disks
light emission
line spectra
optical spectrum
near infrared
brightness
emission spectra
outflow
infrared spectra
volcanic eruption
signatures

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Miller, A. A., Hillenbrand, L. A., Covey, K. R., Poznanski, D., Silverman, J. M., Kleiser, I. K. W., ... Morton, A. (2011). Evidence for an FU orionis-like outburst from a classical T tauri star. Astrophysical Journal, 730(2), [80]. https://doi.org/10.1088/0004-637X/730/2/80
Miller, Adam A. ; Hillenbrand, Lynne A. ; Covey, Kevin R. ; Poznanski, Dovi ; Silverman, Jeffrey M. ; Kleiser, Io K.W. ; Rojas-Ayala, Brbara ; Muirhead, Philip S. ; Cenko, S. Bradley ; Bloom, Joshua S. ; Kasliwal, Mansi M. ; Filippenko, Alexei V. ; Law, Nicholas M. ; Ofek, Eran O. ; Dekany, Richard G. ; Rahmer, Gustavo ; Hale, David ; Smith, Roger ; Quimby, Robert M. ; Nugent, Peter ; Jacobsen, Janet ; Zolkower, Jeff ; Velur, Viswa ; Walters, Richard ; Henning, John ; Bui, Khanh ; McKenna, Dan ; Kulkarni, Shrinivas R. ; Klein, Christopher R. ; Kandrashoff, Michael ; Morton, Alekzandir. / Evidence for an FU orionis-like outburst from a classical T tauri star. En: Astrophysical Journal. 2011 ; Vol. 730, N.º 2.
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title = "Evidence for an FU orionis-like outburst from a classical T tauri star",
abstract = "We present pre- and post-outburst observations of the new FU Orionis-like young stellar object PTF 10qpf (also known as LkHα 188-G4 and HBC 722). Prior to this outburst, LkHα 188-G4 was classified as a classical TTauri star (CTTS) on the basis of its optical emission-line spectrum superposed on a K8-type photosphere and its photometric variability. The mid-infrared spectral index of LkHα 188-G4 indicates a Class II-type object. LkHα 188-G4 exhibited a steady rise by 1mag over 11 months starting in August 2009, before a subsequent more abrupt rise of >3mag on a timescale of 2 months. Observations taken during the eruption exhibit the defining characteristics of FU Orionis variables: (1) an increase in brightness by ≳4mag, (2) a bright optical/near-infrared reflection nebula appeared, (3) optical spectra are consistent with a G supergiant and dominated by absorption lines, the only exception being Hα which is characterized by a P Cygni profile, (4) near-infrared spectra resemble those of late K-M giants/supergiants with enhanced absorption seen in the molecular bands of CO and H2O, and (5) outflow signatures in H and He are seen in the form of blueshifted absorption profiles. LkHα 188-G4 is the first member of the FU Orionis-like class with a well-sampled optical to mid-infrared spectral energy distribution in the pre-outburst phase. The association of the PTF 10qpf outburst with the previously identified CTTS LkHα 188-G4 (HBC 722) provides strong evidence that FU Orionis-like eruptions represent periods of enhanced disk accretion and outflow, likely triggered by instabilities in the disk. The early identification of PTF 10qpf as an FU Orionis-like variable will enable detailed photometric and spectroscopic observations during its post-outburst evolution for comparison with other known outbursting objects.",
keywords = "stars: formation, stars: individual (LkHa 188-G4, HBC 722), stars: pre-main sequence, stars: variables: T Tauri, Herbig Ae/Be, stars: winds, outflows",
author = "Miller, {Adam A.} and Hillenbrand, {Lynne A.} and Covey, {Kevin R.} and Dovi Poznanski and Silverman, {Jeffrey M.} and Kleiser, {Io K.W.} and Brbara Rojas-Ayala and Muirhead, {Philip S.} and Cenko, {S. Bradley} and Bloom, {Joshua S.} and Kasliwal, {Mansi M.} and Filippenko, {Alexei V.} and Law, {Nicholas M.} and Ofek, {Eran O.} and Dekany, {Richard G.} and Gustavo Rahmer and David Hale and Roger Smith and Quimby, {Robert M.} and Peter Nugent and Janet Jacobsen and Jeff Zolkower and Viswa Velur and Richard Walters and John Henning and Khanh Bui and Dan McKenna and Kulkarni, {Shrinivas R.} and Klein, {Christopher R.} and Michael Kandrashoff and Alekzandir Morton",
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Miller, AA, Hillenbrand, LA, Covey, KR, Poznanski, D, Silverman, JM, Kleiser, IKW, Rojas-Ayala, B, Muirhead, PS, Cenko, SB, Bloom, JS, Kasliwal, MM, Filippenko, AV, Law, NM, Ofek, EO, Dekany, RG, Rahmer, G, Hale, D, Smith, R, Quimby, RM, Nugent, P, Jacobsen, J, Zolkower, J, Velur, V, Walters, R, Henning, J, Bui, K, McKenna, D, Kulkarni, SR, Klein, CR, Kandrashoff, M & Morton, A 2011, 'Evidence for an FU orionis-like outburst from a classical T tauri star', Astrophysical Journal, vol. 730, n.º 2, 80. https://doi.org/10.1088/0004-637X/730/2/80

Evidence for an FU orionis-like outburst from a classical T tauri star. / Miller, Adam A.; Hillenbrand, Lynne A.; Covey, Kevin R.; Poznanski, Dovi; Silverman, Jeffrey M.; Kleiser, Io K.W.; Rojas-Ayala, Brbara; Muirhead, Philip S.; Cenko, S. Bradley; Bloom, Joshua S.; Kasliwal, Mansi M.; Filippenko, Alexei V.; Law, Nicholas M.; Ofek, Eran O.; Dekany, Richard G.; Rahmer, Gustavo; Hale, David; Smith, Roger; Quimby, Robert M.; Nugent, Peter; Jacobsen, Janet; Zolkower, Jeff; Velur, Viswa; Walters, Richard; Henning, John; Bui, Khanh; McKenna, Dan; Kulkarni, Shrinivas R.; Klein, Christopher R.; Kandrashoff, Michael; Morton, Alekzandir.

En: Astrophysical Journal, Vol. 730, N.º 2, 80, 01.04.2011.

Resultado de la investigación: Article

TY - JOUR

T1 - Evidence for an FU orionis-like outburst from a classical T tauri star

AU - Miller, Adam A.

AU - Hillenbrand, Lynne A.

AU - Covey, Kevin R.

AU - Poznanski, Dovi

AU - Silverman, Jeffrey M.

AU - Kleiser, Io K.W.

AU - Rojas-Ayala, Brbara

AU - Muirhead, Philip S.

AU - Cenko, S. Bradley

AU - Bloom, Joshua S.

AU - Kasliwal, Mansi M.

AU - Filippenko, Alexei V.

AU - Law, Nicholas M.

AU - Ofek, Eran O.

AU - Dekany, Richard G.

AU - Rahmer, Gustavo

AU - Hale, David

AU - Smith, Roger

AU - Quimby, Robert M.

AU - Nugent, Peter

AU - Jacobsen, Janet

AU - Zolkower, Jeff

AU - Velur, Viswa

AU - Walters, Richard

AU - Henning, John

AU - Bui, Khanh

AU - McKenna, Dan

AU - Kulkarni, Shrinivas R.

AU - Klein, Christopher R.

AU - Kandrashoff, Michael

AU - Morton, Alekzandir

PY - 2011/4/1

Y1 - 2011/4/1

N2 - We present pre- and post-outburst observations of the new FU Orionis-like young stellar object PTF 10qpf (also known as LkHα 188-G4 and HBC 722). Prior to this outburst, LkHα 188-G4 was classified as a classical TTauri star (CTTS) on the basis of its optical emission-line spectrum superposed on a K8-type photosphere and its photometric variability. The mid-infrared spectral index of LkHα 188-G4 indicates a Class II-type object. LkHα 188-G4 exhibited a steady rise by 1mag over 11 months starting in August 2009, before a subsequent more abrupt rise of >3mag on a timescale of 2 months. Observations taken during the eruption exhibit the defining characteristics of FU Orionis variables: (1) an increase in brightness by ≳4mag, (2) a bright optical/near-infrared reflection nebula appeared, (3) optical spectra are consistent with a G supergiant and dominated by absorption lines, the only exception being Hα which is characterized by a P Cygni profile, (4) near-infrared spectra resemble those of late K-M giants/supergiants with enhanced absorption seen in the molecular bands of CO and H2O, and (5) outflow signatures in H and He are seen in the form of blueshifted absorption profiles. LkHα 188-G4 is the first member of the FU Orionis-like class with a well-sampled optical to mid-infrared spectral energy distribution in the pre-outburst phase. The association of the PTF 10qpf outburst with the previously identified CTTS LkHα 188-G4 (HBC 722) provides strong evidence that FU Orionis-like eruptions represent periods of enhanced disk accretion and outflow, likely triggered by instabilities in the disk. The early identification of PTF 10qpf as an FU Orionis-like variable will enable detailed photometric and spectroscopic observations during its post-outburst evolution for comparison with other known outbursting objects.

AB - We present pre- and post-outburst observations of the new FU Orionis-like young stellar object PTF 10qpf (also known as LkHα 188-G4 and HBC 722). Prior to this outburst, LkHα 188-G4 was classified as a classical TTauri star (CTTS) on the basis of its optical emission-line spectrum superposed on a K8-type photosphere and its photometric variability. The mid-infrared spectral index of LkHα 188-G4 indicates a Class II-type object. LkHα 188-G4 exhibited a steady rise by 1mag over 11 months starting in August 2009, before a subsequent more abrupt rise of >3mag on a timescale of 2 months. Observations taken during the eruption exhibit the defining characteristics of FU Orionis variables: (1) an increase in brightness by ≳4mag, (2) a bright optical/near-infrared reflection nebula appeared, (3) optical spectra are consistent with a G supergiant and dominated by absorption lines, the only exception being Hα which is characterized by a P Cygni profile, (4) near-infrared spectra resemble those of late K-M giants/supergiants with enhanced absorption seen in the molecular bands of CO and H2O, and (5) outflow signatures in H and He are seen in the form of blueshifted absorption profiles. LkHα 188-G4 is the first member of the FU Orionis-like class with a well-sampled optical to mid-infrared spectral energy distribution in the pre-outburst phase. The association of the PTF 10qpf outburst with the previously identified CTTS LkHα 188-G4 (HBC 722) provides strong evidence that FU Orionis-like eruptions represent periods of enhanced disk accretion and outflow, likely triggered by instabilities in the disk. The early identification of PTF 10qpf as an FU Orionis-like variable will enable detailed photometric and spectroscopic observations during its post-outburst evolution for comparison with other known outbursting objects.

KW - stars: formation

KW - stars: individual (LkHa 188-G4, HBC 722)

KW - stars: pre-main sequence

KW - stars: variables: T Tauri, Herbig Ae/Be

KW - stars: winds, outflows

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U2 - 10.1088/0004-637X/730/2/80

DO - 10.1088/0004-637X/730/2/80

M3 - Article

AN - SCOPUS:79953739073

VL - 730

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 80

ER -

Miller AA, Hillenbrand LA, Covey KR, Poznanski D, Silverman JM, Kleiser IKW y otros. Evidence for an FU orionis-like outburst from a classical T tauri star. Astrophysical Journal. 2011 abr 1;730(2). 80. https://doi.org/10.1088/0004-637X/730/2/80