PTF10nvg: An outbursting class i protostar in the pelican/North American Nebula

Kevin R. Covey; Lynne A. Hillenbrand; Adam A. Miller; Dovi Poznanski; S. Bradley Cenko; Jeffrey M. Silverman; Joshua S. Bloom; Mansi M. Kasliwal; William Fischer; John Rayner; Luisa M. Rebul; Nathaniel R. Butler; Alexei V. Filippenko; Nicholas M. Law; Eran O. Ofek; Marcel Agüeros; Richard G. Dekany; Gustavo Rahmer; David Hale; Roger Smith; Robert M. Quimby; Peter Nugent; Janet Jacobsen; Jeff Zolkower; Viswa Velur; Richard Walters; John Henning; Khanh Bui; Dan McKenna; Shrinivas R. Kulkarni; Christopher Klein

doi:10.1088/0004-6256/141/2/40

PTF10nvg: An outbursting class i protostar in the pelican/North American Nebula

Kevin R. Covey, Lynne A. Hillenbrand, Adam A. Miller, Dovi Poznanski, S. Bradley Cenko, Jeffrey M. Silverman, Joshua S. Bloom, Mansi M. Kasliwal, William Fischer, John Rayner, Luisa M. Rebul, Nathaniel R. Butler, Alexei V. Filippenko, Nicholas M. Law, Eran O. Ofek, Marcel Agüeros, Richard G. Dekany, Gustavo Rahmer, David Hale, Roger SmithRobert M. Quimby, Peter Nugent, Janet Jacobsen, Jeff Zolkower, Viswa Velur, Richard Walters, John Henning, Khanh Bui, Dan McKenna, Shrinivas R. Kulkarni, Christopher Klein

Research output: Contribution to journal › Article › peer-review

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Abstract

During a synoptic survey of the North American Nebula region, the Palomar Transient Factory (PTF) detected an optical outburst (dubbed PTF10nvg) associated with the previously unstudied flat or rising spectrum infrared source IRAS 20496+4354. The PTF R-band light curve reveals that PTF10nvg brightened by more than 5 mag during the current outburst, rising to a peak magnitude of R_PTF ≈ 13.5 in 2010 September. Follow-up observationsindicate that PTF10nvg has undergone a similar ∼ 5 mag brightening in the K band and possesses a rich emissionline spectrum, including numerous lines commonly assumed to trace mass accretion and outflows. Many of these lines are blueshifted by ∼ 175 km s^?1 from the North American Nebula's rest velocity, suggesting that PTF10nvg is driving an outflow. Optical spectra of PTF10nvg show several TiO/VO band heads fully in emission, indicating the presence of an unusual amount of dense (>10¹⁰ cm^?3), warm (1500-4000 K) circumstellar material. Nearinfrared spectra of PTF10nvg appear quite similar to a spectrum of McNeil's Nebula/V1647 Ori, a young star which has undergone several brightenings in recent decades, and 06297+1021W, a Class I protostar with a similarly reached near-infrared emission line spectrum. While further monitoring is required to fully understand this event, we conclude that the brightening of PTF10nvg is indicative of enhanced accretion and outflow in this Class-I-type protostellar object, similar to the behavior of V1647 Ori in 2004-2005.

Original language	English (US)
Journal	Astronomical Journal
Volume	141
Issue number	2
DOIs	https://doi.org/10.1088/0004-6256/141/2/40
State	Published - Feb 2011
Externally published	Yes

Keywords

Be-stars
Emission-line
Formation-stars
General-stars
Outflows
Pre-main sequence - stars
Stars
Variables
Winds

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-6256/141/2/40

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Covey, K. R., Hillenbrand, L. A., Miller, A. A., Poznanski, D., Cenko, S. B., Silverman, J. M., Bloom, J. S., Kasliwal, M. M., Fischer, W., Rayner, J., Rebul, L. M., Butler, N. R., Filippenko, A. V., Law, N. M., Ofek, E. O., Agüeros, M., Dekany, R. G., Rahmer, G., Hale, D., ... Klein, C. (2011). PTF10nvg: An outbursting class i protostar in the pelican/North American Nebula. Astronomical Journal, 141(2). https://doi.org/10.1088/0004-6256/141/2/40

Covey, KR, Hillenbrand, LA, Miller, AA, Poznanski, D, Cenko, SB, Silverman, JM, Bloom, JS, Kasliwal, MM, Fischer, W, Rayner, J, Rebul, LM, Butler, NR, Filippenko, AV, Law, NM, Ofek, EO, Agüeros, M, 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, C 2011, 'PTF10nvg: An outbursting class i protostar in the pelican/North American Nebula', Astronomical Journal, vol. 141, no. 2. https://doi.org/10.1088/0004-6256/141/2/40

@article{991ab0fd957e4fbf88b647b245aba9bc,

title = "PTF10nvg: An outbursting class i protostar in the pelican/North American Nebula",

abstract = "During a synoptic survey of the North American Nebula region, the Palomar Transient Factory (PTF) detected an optical outburst (dubbed PTF10nvg) associated with the previously unstudied flat or rising spectrum infrared source IRAS 20496+4354. The PTF R-band light curve reveals that PTF10nvg brightened by more than 5 mag during the current outburst, rising to a peak magnitude of RPTF ≈ 13.5 in 2010 September. Follow-up observationsindicate that PTF10nvg has undergone a similar ∼ 5 mag brightening in the K band and possesses a rich emissionline spectrum, including numerous lines commonly assumed to trace mass accretion and outflows. Many of these lines are blueshifted by ∼ 175 km s?1 from the North American Nebula's rest velocity, suggesting that PTF10nvg is driving an outflow. Optical spectra of PTF10nvg show several TiO/VO band heads fully in emission, indicating the presence of an unusual amount of dense (>1010 cm?3), warm (1500-4000 K) circumstellar material. Nearinfrared spectra of PTF10nvg appear quite similar to a spectrum of McNeil's Nebula/V1647 Ori, a young star which has undergone several brightenings in recent decades, and 06297+1021W, a Class I protostar with a similarly reached near-infrared emission line spectrum. While further monitoring is required to fully understand this event, we conclude that the brightening of PTF10nvg is indicative of enhanced accretion and outflow in this Class-I-type protostellar object, similar to the behavior of V1647 Ori in 2004-2005.",

keywords = "Be-stars, Emission-line, Formation-stars, General-stars, Outflows, Pre-main sequence - stars, Stars, Variables, Winds",

author = "Covey, {Kevin R.} and Hillenbrand, {Lynne A.} and Miller, {Adam A.} and Dovi Poznanski and Cenko, {S. Bradley} and Silverman, {Jeffrey M.} and Bloom, {Joshua S.} and Kasliwal, {Mansi M.} and William Fischer and John Rayner and Rebul, {Luisa M.} and Butler, {Nathaniel R.} and Filippenko, {Alexei V.} and Law, {Nicholas M.} and Ofek, {Eran O.} and Marcel Ag{\"u}eros 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 Christopher Klein",

year = "2011",

month = feb,

doi = "10.1088/0004-6256/141/2/40",

language = "English (US)",

volume = "141",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "IOP Publishing Ltd.",

number = "2",

}

TY - JOUR

T1 - PTF10nvg

T2 - An outbursting class i protostar in the pelican/North American Nebula

AU - Covey, Kevin R.

AU - Hillenbrand, Lynne A.

AU - Miller, Adam A.

AU - Poznanski, Dovi

AU - Cenko, S. Bradley

AU - Silverman, Jeffrey M.

AU - Bloom, Joshua S.

AU - Kasliwal, Mansi M.

AU - Fischer, William

AU - Rayner, John

AU - Rebul, Luisa M.

AU - Butler, Nathaniel R.

AU - Filippenko, Alexei V.

AU - Law, Nicholas M.

AU - Ofek, Eran O.

AU - Agüeros, Marcel

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

PY - 2011/2

Y1 - 2011/2

N2 - During a synoptic survey of the North American Nebula region, the Palomar Transient Factory (PTF) detected an optical outburst (dubbed PTF10nvg) associated with the previously unstudied flat or rising spectrum infrared source IRAS 20496+4354. The PTF R-band light curve reveals that PTF10nvg brightened by more than 5 mag during the current outburst, rising to a peak magnitude of RPTF ≈ 13.5 in 2010 September. Follow-up observationsindicate that PTF10nvg has undergone a similar ∼ 5 mag brightening in the K band and possesses a rich emissionline spectrum, including numerous lines commonly assumed to trace mass accretion and outflows. Many of these lines are blueshifted by ∼ 175 km s?1 from the North American Nebula's rest velocity, suggesting that PTF10nvg is driving an outflow. Optical spectra of PTF10nvg show several TiO/VO band heads fully in emission, indicating the presence of an unusual amount of dense (>1010 cm?3), warm (1500-4000 K) circumstellar material. Nearinfrared spectra of PTF10nvg appear quite similar to a spectrum of McNeil's Nebula/V1647 Ori, a young star which has undergone several brightenings in recent decades, and 06297+1021W, a Class I protostar with a similarly reached near-infrared emission line spectrum. While further monitoring is required to fully understand this event, we conclude that the brightening of PTF10nvg is indicative of enhanced accretion and outflow in this Class-I-type protostellar object, similar to the behavior of V1647 Ori in 2004-2005.

AB - During a synoptic survey of the North American Nebula region, the Palomar Transient Factory (PTF) detected an optical outburst (dubbed PTF10nvg) associated with the previously unstudied flat or rising spectrum infrared source IRAS 20496+4354. The PTF R-band light curve reveals that PTF10nvg brightened by more than 5 mag during the current outburst, rising to a peak magnitude of RPTF ≈ 13.5 in 2010 September. Follow-up observationsindicate that PTF10nvg has undergone a similar ∼ 5 mag brightening in the K band and possesses a rich emissionline spectrum, including numerous lines commonly assumed to trace mass accretion and outflows. Many of these lines are blueshifted by ∼ 175 km s?1 from the North American Nebula's rest velocity, suggesting that PTF10nvg is driving an outflow. Optical spectra of PTF10nvg show several TiO/VO band heads fully in emission, indicating the presence of an unusual amount of dense (>1010 cm?3), warm (1500-4000 K) circumstellar material. Nearinfrared spectra of PTF10nvg appear quite similar to a spectrum of McNeil's Nebula/V1647 Ori, a young star which has undergone several brightenings in recent decades, and 06297+1021W, a Class I protostar with a similarly reached near-infrared emission line spectrum. While further monitoring is required to fully understand this event, we conclude that the brightening of PTF10nvg is indicative of enhanced accretion and outflow in this Class-I-type protostellar object, similar to the behavior of V1647 Ori in 2004-2005.

KW - Be-stars

KW - Emission-line

KW - Formation-stars

KW - General-stars

KW - Outflows

KW - Pre-main sequence - stars

KW - Stars

KW - Variables

KW - Winds

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U2 - 10.1088/0004-6256/141/2/40

DO - 10.1088/0004-6256/141/2/40

M3 - Article

AN - SCOPUS:79551523693

SN - 0004-6256

VL - 141

JO - Astronomical Journal

JF - Astronomical Journal

IS - 2

ER -

PTF10nvg: An outbursting class i protostar in the pelican/North American Nebula

Abstract

Keywords

ASJC Scopus subject areas

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