TY - JOUR

T1 - MASTER OT J004207.99+405501.1/M31LRN 2015 luminous red nova in M31

T2 - Discovery, light curve, hydrodynamics and evolution

AU - Lipunov, V. M.

AU - Blinnikov, S.

AU - Gorbovskoy, E.

AU - Tutukov, A.

AU - Baklanov, P.

AU - Krushinski, V.

AU - Tiurina, N.

AU - Balanutsa, P.

AU - Kuznetsov, A.

AU - Kornilov, V.

AU - Gorbunov, I.

AU - Shumkov, V.

AU - Vladimirov, V.

AU - Gress, O.

AU - Budnev, N. M.

AU - Ivanov, K.

AU - Tlatov, A.

AU - Gabovich, A.

AU - Yurkov, V.

AU - Sergienko, Yu

AU - Zalozhnykh, I.

PY - 2017/9/11

Y1 - 2017/9/11

N2 - We report the discovery and multicolour (VRIW) photometry of the rare explosive star MASTEROT J004207.99+405501.1 - a luminous red nova - in theAndromeda galaxy M31N2015-01a. We use our original light curve acquired with identical MASTER Global Robotic Net telescopes in one photometric system: VRI during the first 30 d and W (unfiltered) during 70 d. Also, we added published multicolour photometry data to estimate the mass and energy of the ejected shell and we discuss the likely formation scenarios of outbursts of this type. We propose an interpretation of the explosion that is consistent with an evolutionary scenario where the merging of stellar components or the disruption of the common envelope of a close binary can explain some luminous red novae. Radiative hydrodynamic simulations of a luminous red nova were carried out in extended parameter space to fit its light curves. We find that the multicolour passband light curves of the luminous red nova are consistent with an initial common envelope radius of 10 R⊙, a merger mass of 3M⊙ and an explosion energy of 3 × 1048 erg. As a result, the phenomenon of novae consists of two classes: classical nuclear novae and more rare events (red novae) connected with the loss of compact common envelopes.

AB - We report the discovery and multicolour (VRIW) photometry of the rare explosive star MASTEROT J004207.99+405501.1 - a luminous red nova - in theAndromeda galaxy M31N2015-01a. We use our original light curve acquired with identical MASTER Global Robotic Net telescopes in one photometric system: VRI during the first 30 d and W (unfiltered) during 70 d. Also, we added published multicolour photometry data to estimate the mass and energy of the ejected shell and we discuss the likely formation scenarios of outbursts of this type. We propose an interpretation of the explosion that is consistent with an evolutionary scenario where the merging of stellar components or the disruption of the common envelope of a close binary can explain some luminous red novae. Radiative hydrodynamic simulations of a luminous red nova were carried out in extended parameter space to fit its light curves. We find that the multicolour passband light curves of the luminous red nova are consistent with an initial common envelope radius of 10 R⊙, a merger mass of 3M⊙ and an explosion energy of 3 × 1048 erg. As a result, the phenomenon of novae consists of two classes: classical nuclear novae and more rare events (red novae) connected with the loss of compact common envelopes.

KW - Hydrodynamics

KW - Novae, cataclysmic variables

KW - Stars: evolution

KW - Stars: individual: MASTEROTJ004207.99+405501.1

KW - Surveys

KW - Techniques: photometric

KW - NETWORK

KW - techniques: photometric

KW - stars: evolution

KW - surveys

KW - hydrodynamics

KW - MODEL

KW - PARAMETERS

KW - SUPERNOVAE

KW - novae, cataclysmic variables

KW - ERUPTION

KW - PHOTOMETRY

KW - ENVELOPE

KW - TRANSIENTS

KW - STARS

KW - V838 MONOCEROTIS

KW - stars: individual: MASTEROTJ004207.99+405501.1

UR - http://www.scopus.com/inward/record.url?scp=85023770991&partnerID=8YFLogxK

U2 - 10.1093/mnras/stx1107

DO - 10.1093/mnras/stx1107

M3 - Article

AN - SCOPUS:85023770991

VL - 470

SP - 2339

EP - 2350

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

M1 - stx1107

ER -