A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy

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

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A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy. / Coppejans, D. L.; Margutti, R.; Terreran, G.; Nayana, A. J.; Coughlin, E. R.; Laskar, T.; Alexander, K. D.; Bietenholz, M.; Caprioli, D.; Chandra, P.; Drout, M. R.; Frederiks, D.; Frohmaier, C.; Hurley, K. H.; Kochanek, C. S.; MacLeod, M.; Meisner, A.; Nugent, P. E.; Ridnaia, A.; Sand, D. J.; Svinkin, D.; Ward, C.; Yang, S.; Baldeschi, A.; Chilingarian, I.; Dong, Y.; Esquivia, C.; Fong, W.; Guidorzi, C.; Lundqvist, P.; Milisavljevic, D.; Paterson, K.; Reichart, D. E.; Shappee, B.; Stroh, M. C.; Valenti, S.; Zauderer, B. A.; Zhang, B.

In: Astrophysical Journal Letters, Vol. 895, No. 1, 23, 05.2020.

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

Harvard

Coppejans, DL, Margutti, R, Terreran, G, Nayana, AJ, Coughlin, ER, Laskar, T, Alexander, KD, Bietenholz, M, Caprioli, D, Chandra, P, Drout, MR, Frederiks, D, Frohmaier, C, Hurley, KH, Kochanek, CS, MacLeod, M, Meisner, A, Nugent, PE, Ridnaia, A, Sand, DJ, Svinkin, D, Ward, C, Yang, S, Baldeschi, A, Chilingarian, I, Dong, Y, Esquivia, C, Fong, W, Guidorzi, C, Lundqvist, P, Milisavljevic, D, Paterson, K, Reichart, DE, Shappee, B, Stroh, MC, Valenti, S, Zauderer, BA & Zhang, B 2020, 'A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy', Astrophysical Journal Letters, vol. 895, no. 1, 23. https://doi.org/10.3847/2041-8213/ab8cc7

APA

Coppejans, D. L., Margutti, R., Terreran, G., Nayana, A. J., Coughlin, E. R., Laskar, T., Alexander, K. D., Bietenholz, M., Caprioli, D., Chandra, P., Drout, M. R., Frederiks, D., Frohmaier, C., Hurley, K. H., Kochanek, C. S., MacLeod, M., Meisner, A., Nugent, P. E., Ridnaia, A., ... Zhang, B. (2020). A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy. Astrophysical Journal Letters, 895(1), [23]. https://doi.org/10.3847/2041-8213/ab8cc7

Vancouver

Coppejans DL, Margutti R, Terreran G, Nayana AJ, Coughlin ER, Laskar T et al. A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy. Astrophysical Journal Letters. 2020 May;895(1). 23. https://doi.org/10.3847/2041-8213/ab8cc7

Author

Coppejans, D. L. ; Margutti, R. ; Terreran, G. ; Nayana, A. J. ; Coughlin, E. R. ; Laskar, T. ; Alexander, K. D. ; Bietenholz, M. ; Caprioli, D. ; Chandra, P. ; Drout, M. R. ; Frederiks, D. ; Frohmaier, C. ; Hurley, K. H. ; Kochanek, C. S. ; MacLeod, M. ; Meisner, A. ; Nugent, P. E. ; Ridnaia, A. ; Sand, D. J. ; Svinkin, D. ; Ward, C. ; Yang, S. ; Baldeschi, A. ; Chilingarian, I. ; Dong, Y. ; Esquivia, C. ; Fong, W. ; Guidorzi, C. ; Lundqvist, P. ; Milisavljevic, D. ; Paterson, K. ; Reichart, D. E. ; Shappee, B. ; Stroh, M. C. ; Valenti, S. ; Zauderer, B. A. ; Zhang, B. / A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy. In: Astrophysical Journal Letters. 2020 ; Vol. 895, No. 1.

Bibtex

@article{63a2584f44164d4ba892509501de9b89,
title = "A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy",
abstract = "We present X-ray and radio observations of the Fast Blue Optical Transient CRTS-CSS161010 J045834-081803 (CSS161010 hereafter) at t = 69-531 days. CSS161010 shows luminous X-ray (L-x similar to 5 x 10(39) erg s(-1)) and radio (L-nu similar to 10(29) erg s(-1) Hz(-1)) emission. The radio emission peaked at similar to 100 days post-transient explosion and rapidly decayed. We interpret these observations in the context of synchrotron emission from an expanding blast wave. CSS161010 launched a mildly relativistic outflow with velocity Gamma beta c >= 0.55c at similar to 100 days. This is faster than the non-relativistic AT 2018cow (Gamma beta c similar to 0.1c) and closer to ZTF18abvkwla (Gamma beta c >= 0.3c at 63 days). The inferred initial kinetic energy of CSS161010 (E-k greater than or similar to 10(51) erg) is comparable to that of long gamma-ray bursts, but the ejecta mass that is coupled to the mildly relativistic outflow is significantly larger (similar to 0.01-.1 M-circle dot). This is consistent with the lack of observed gamma-rays. The luminous X-rays were produced by a different emission component to the synchrotron radio emission. CSS161010 is located at similar to 150 Mpc in a dwarf galaxy with stellar mass M-* similar to 10(7) M-circle dot and specific star formation rate sSFR similar to 0.3 Gyr(-1). This mass is among the lowest inferred for host galaxies of explosive transients from massive stars. Our observations of CSS161010 are consistent with an engine-driven aspherical explosion from a rare evolutionary path of a H-rich stellar progenitor, but we cannot rule out a stellar tidal disruption event on a centrally located intermediate-mass black hole. Regardless of the physical mechanism, CSS161010 establishes the existence of a new class of rare (rate < 0.4% of the local core-collapse supernova rate) H-rich transients that can launch mildly relativistic outflows.",
keywords = "Supernovae, Accretion, Black holes, X-ray transient sources, Radio transient sources, GAMMA-RAY BURSTS, STELLAR POPULATION SYNTHESIS, CORE-COLLAPSE SUPERNOVAE, TIDAL DISRUPTION, BLACK-HOLES, HOST GALAXIES, IBC SUPERNOVA, RADIO, RATES, EMISSION",
author = "Coppejans, {D. L.} and R. Margutti and G. Terreran and Nayana, {A. J.} and Coughlin, {E. R.} and T. Laskar and Alexander, {K. D.} and M. Bietenholz and D. Caprioli and P. Chandra and Drout, {M. R.} and D. Frederiks and C. Frohmaier and Hurley, {K. H.} and Kochanek, {C. S.} and M. MacLeod and A. Meisner and Nugent, {P. E.} and A. Ridnaia and Sand, {D. J.} and D. Svinkin and C. Ward and S. Yang and A. Baldeschi and I. Chilingarian and Y. Dong and C. Esquivia and W. Fong and C. Guidorzi and P. Lundqvist and D. Milisavljevic and K. Paterson and Reichart, {D. E.} and B. Shappee and Stroh, {M. C.} and S. Valenti and Zauderer, {B. A.} and B. Zhang",
year = "2020",
month = may,
doi = "10.3847/2041-8213/ab8cc7",
language = "English",
volume = "895",
journal = "The Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP Publishing",
number = "1",

}

RIS

TY - JOUR

T1 - A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy

AU - Coppejans, D. L.

AU - Margutti, R.

AU - Terreran, G.

AU - Nayana, A. J.

AU - Coughlin, E. R.

AU - Laskar, T.

AU - Alexander, K. D.

AU - Bietenholz, M.

AU - Caprioli, D.

AU - Chandra, P.

AU - Drout, M. R.

AU - Frederiks, D.

AU - Frohmaier, C.

AU - Hurley, K. H.

AU - Kochanek, C. S.

AU - MacLeod, M.

AU - Meisner, A.

AU - Nugent, P. E.

AU - Ridnaia, A.

AU - Sand, D. J.

AU - Svinkin, D.

AU - Ward, C.

AU - Yang, S.

AU - Baldeschi, A.

AU - Chilingarian, I.

AU - Dong, Y.

AU - Esquivia, C.

AU - Fong, W.

AU - Guidorzi, C.

AU - Lundqvist, P.

AU - Milisavljevic, D.

AU - Paterson, K.

AU - Reichart, D. E.

AU - Shappee, B.

AU - Stroh, M. C.

AU - Valenti, S.

AU - Zauderer, B. A.

AU - Zhang, B.

PY - 2020/5

Y1 - 2020/5

N2 - We present X-ray and radio observations of the Fast Blue Optical Transient CRTS-CSS161010 J045834-081803 (CSS161010 hereafter) at t = 69-531 days. CSS161010 shows luminous X-ray (L-x similar to 5 x 10(39) erg s(-1)) and radio (L-nu similar to 10(29) erg s(-1) Hz(-1)) emission. The radio emission peaked at similar to 100 days post-transient explosion and rapidly decayed. We interpret these observations in the context of synchrotron emission from an expanding blast wave. CSS161010 launched a mildly relativistic outflow with velocity Gamma beta c >= 0.55c at similar to 100 days. This is faster than the non-relativistic AT 2018cow (Gamma beta c similar to 0.1c) and closer to ZTF18abvkwla (Gamma beta c >= 0.3c at 63 days). The inferred initial kinetic energy of CSS161010 (E-k greater than or similar to 10(51) erg) is comparable to that of long gamma-ray bursts, but the ejecta mass that is coupled to the mildly relativistic outflow is significantly larger (similar to 0.01-.1 M-circle dot). This is consistent with the lack of observed gamma-rays. The luminous X-rays were produced by a different emission component to the synchrotron radio emission. CSS161010 is located at similar to 150 Mpc in a dwarf galaxy with stellar mass M-* similar to 10(7) M-circle dot and specific star formation rate sSFR similar to 0.3 Gyr(-1). This mass is among the lowest inferred for host galaxies of explosive transients from massive stars. Our observations of CSS161010 are consistent with an engine-driven aspherical explosion from a rare evolutionary path of a H-rich stellar progenitor, but we cannot rule out a stellar tidal disruption event on a centrally located intermediate-mass black hole. Regardless of the physical mechanism, CSS161010 establishes the existence of a new class of rare (rate < 0.4% of the local core-collapse supernova rate) H-rich transients that can launch mildly relativistic outflows.

AB - We present X-ray and radio observations of the Fast Blue Optical Transient CRTS-CSS161010 J045834-081803 (CSS161010 hereafter) at t = 69-531 days. CSS161010 shows luminous X-ray (L-x similar to 5 x 10(39) erg s(-1)) and radio (L-nu similar to 10(29) erg s(-1) Hz(-1)) emission. The radio emission peaked at similar to 100 days post-transient explosion and rapidly decayed. We interpret these observations in the context of synchrotron emission from an expanding blast wave. CSS161010 launched a mildly relativistic outflow with velocity Gamma beta c >= 0.55c at similar to 100 days. This is faster than the non-relativistic AT 2018cow (Gamma beta c similar to 0.1c) and closer to ZTF18abvkwla (Gamma beta c >= 0.3c at 63 days). The inferred initial kinetic energy of CSS161010 (E-k greater than or similar to 10(51) erg) is comparable to that of long gamma-ray bursts, but the ejecta mass that is coupled to the mildly relativistic outflow is significantly larger (similar to 0.01-.1 M-circle dot). This is consistent with the lack of observed gamma-rays. The luminous X-rays were produced by a different emission component to the synchrotron radio emission. CSS161010 is located at similar to 150 Mpc in a dwarf galaxy with stellar mass M-* similar to 10(7) M-circle dot and specific star formation rate sSFR similar to 0.3 Gyr(-1). This mass is among the lowest inferred for host galaxies of explosive transients from massive stars. Our observations of CSS161010 are consistent with an engine-driven aspherical explosion from a rare evolutionary path of a H-rich stellar progenitor, but we cannot rule out a stellar tidal disruption event on a centrally located intermediate-mass black hole. Regardless of the physical mechanism, CSS161010 establishes the existence of a new class of rare (rate < 0.4% of the local core-collapse supernova rate) H-rich transients that can launch mildly relativistic outflows.

KW - Supernovae

KW - Accretion

KW - Black holes

KW - X-ray transient sources

KW - Radio transient sources

KW - GAMMA-RAY BURSTS

KW - STELLAR POPULATION SYNTHESIS

KW - CORE-COLLAPSE SUPERNOVAE

KW - TIDAL DISRUPTION

KW - BLACK-HOLES

KW - HOST GALAXIES

KW - IBC SUPERNOVA

KW - RADIO

KW - RATES

KW - EMISSION

U2 - 10.3847/2041-8213/ab8cc7

DO - 10.3847/2041-8213/ab8cc7

M3 - Letter

VL - 895

JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

SN - 2041-8205

IS - 1

M1 - 23

ER -

ID: 271825270