Direct evidence for shock-powered optical emission in a nova

被引：77

作者：

Aydi, Elias ^{[1
]}

Sokolovsky, Kirill V. . ^{[1
,2
,3
]}

Chomiuk, Laura ^{[1
]}

Steinberg, Elad ^{[4
,5
,6
]}

Li, Kwan Lok ^{[7
,8
]}

Vurm, Indrek ^{[9
]}

Metzger, Brian D. ^{[4
,5
]}

Strader, Jay ^{[1
]}

Mukai, Koji ^{[10
,11
,12
]}

Pejcha, Ondrej ^{[13
]}

Shen, Ken J. ^{[14
,15
]}

Wade, Gregg A. ^{[16
]}

Kuschnig, Rainer ^{[17
]}

Moffat, Anthony F. J. ^{[18
,19
]}

Pablo, Herbert ^{[20
]}

Pigulski, Andrzej ^{[21
,22
]}

Popowicz, Adam ^{[24
]}

Weiss, Werner ^{[23
,25
]}

Zwintz, Konstanze ^{[26
]}

Izzo, Luca ^{[28
]}

Pollard, Karen R. ^{[29
]}

Handler, Gerald ^{[30
]}

Ryder, Stuart D. ^{[31
]}

Filipovic, Miroslav D. ^{[32
]}

Alsaberi, Rami Z. E. ^{[32
]}

Manojlovic, Perica ^{[32
]}

de Oliveira, Raimundo Lopes ^{[34
,35
,36
]}

Walter, Frederick M. ^{[37
]}

Vallely, Patrick J. ^{[38
]}

Buckley, David A. H. ^{[39
]}

Brown, Michael J. I. ^{[40
]}

Harvey, Eamonn J. ^{[41
]}

Kawash, Adam ^{[1
]}

Kniazev, Alexei ^{[42
,43
,44
]}

Kochanek, Christopher S. ^{[33
]}

Linford, Justin ^{[45
]}

Mikolajewska, Joanna ^{[27
]}

Molaro, Paolo ^{[46
]}

Orio, Marina ^{[44
,45
]}

Page, Kim L. ^{[46
]}

Shappee, Benjamin J. ^{[47
]}

Sokoloski, Jennifer L. ^{[4
]}

机构：

[1] Michigan State Univ, Dept Phys & Astron, Ctr Data Intens & Time Domain Astron, E Lansing, MI 48824 USA

[2] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Univ Skii Pr 13, Moscow 119992, Russia

[3] Lebedev Phys Inst, Astro Space Ctr, Profsoyuznaya St 84-32, Moscow 117997, Russia

[4] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[5] Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA

[6] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[7] UNIST, Dept Phys, Ulsan 44919, South Korea

[8] Natl Tsing Hua Univ, Inst Astron, Hsinchu 30013, Taiwan

[9] Univ Tartu, Tartu Observ, EE-61602 Tartumaa, Estonia

[10] NASA GSFC, CRESST, Greenbelt, MD 20771 USA

[11] NASA GSFC, Xray Astrophys Lab, Greenbelt, MD 20771 USA

[12] Univ Maryland Baltimore Cty, Dept Phys, 1000 Hilltop Circle, Baltimore, MD 21250 USA

[13] Charles Univ Prague, Inst Theoret Phys, Fac Math & Phys, Prague, Czech Republic

[14] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[15] Univ Calif Berkeley, Theoret Astrophys Ctr, Berkeley, CA 94720 USA

[16] Royal Mil Coll Canada, Dept Phys & Space Sci, POB 17000, Kingston, ON K7K 7B4, Canada

[17] Graz Univ Technol, Inst Commun Networks & Satellite Commun, Infeldgasse 12, A-8010 Graz, Austria

[18] Univ Montreal, Dept Phys, CP 6128,Succ Ctr Ville, Montreal, PQ H3C 3J7, Canada

[19] Ctr Rech Astrophys Queebec, Montreal, PQ H3C 3J7, Canada

[20] AAVSO, 49 Bay State Rd, Cambridge, MA 02138 USA

[21] Uniwersytet Wroclawski, Inst Astron, Kopernika 11, PL-51622 Wroclaw, Poland

[22] Silesian Tech Univ, Inst Elect, Akad 16, PL-44100 Gliwice, Poland

[23] Univ Vienna, Inst Astrophys, Tuerkenschanzstr 17, A-1180 Vienna, Austria

[24] Univ Innsbruck, Inst Astro & Teilchenphys, Technikerstr 25, A-6020 Innsbruck, Austria

[25] Univ Copenhagen, Niels Bohr Inst, DARK, Lyngbyvej 2, DK-2100 Copenhagen, Denmark

[26] Univ Canterbury, Sch Phys & Chem Sci, Christchurch, New Zealand

[27] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Warsaw, Poland

[28] Macquarie Univ, Dept Phys & Astron, Sydney, NSW, Australia

[29] Univ Western Sydney, Sch Comp Engn & Math, Penrith, NSW, Australia

[30] Univ Fed Sergipe, Dept Fis, Sao Cristovao, Brazil

[31] Observatorio Nacl, Rio De Janeiro, Brazil

[32] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY USA

[33] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[34] South African Astron Observ, Observatory, South Africa

[35] Monash Univ, Sch Phys, Clayton, Vic, Australia

[36] Monash Univ, Monash Ctr Astrophys, Clayton, Vic, Australia

[37] Liverpool John Moores Univ, Astrophys Res Inst, Liverpool, Merseyside, England

[38] Southern African Large Telescope Fdn, Observatory, South Africa

[39] Lomonosov Moscow State Univ, Sternberg Astron Inst, Moscow, Russia

[40] West Virginia Univ, Dept Phys & Astron, Morgantown, WV USA

[41] West Virginia Univ, Ctr Gravitat Waves & Cosmol, Morgantown, WV USA

[42] Natl Radio Astron Observ, Socorro, NM USA

[43] INAF Osservatorio Astron Trieste, Trieste, Italy

[44] INAF Osservatorio Padova, Padua, Italy

[45] Univ Wisconsin, Dept Astron, Madison, WI USA

[46] Univ Leicester, Sch Phys & Astron, Leicester, Leics, England

[47] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

来源：

NATURE ASTRONOMY | 2020年 / 4卷 / 08期

基金：

新加坡国家研究基金会; 加拿大自然科学与工程研究理事会; 欧盟地平线“2020”; 俄罗斯科学基金会;

关键词：

GAMMA-RAY EMISSION; LIGHT CURVES; ACCELERATION; EJECTION; OUTBURST;

D O I：

10.1038/s41550-020-1070-y

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Classical novae are thermonuclear explosions that occur on the surfaces of white dwarf stars in interacting binary systems(1). It has long been thought that the luminosity of classical novae is powered by continued nuclear burning on the surface of the white dwarf after the initial runaway(2). However, recent observations of gigaelectronvolt gamma-rays from classical novae have hinted that shocks internal to the nova ejecta may dominate the nova emission. Shocks have also been suggested to power the luminosity of events as diverse as stellar mergers(3), supernovae(4) and tidal disruption events(5), but observational confirmation has been lacking. Here we report simultaneous space-based optical and gamma-ray observations of the 2018 nova V906 Carinae (ASASSN-18fv), revealing a remarkable series of distinct correlated flares in both bands. The optical and gamma-ray flares occur simultaneously, implying a common origin in shocks. During the flares, the nova luminosity doubles, implying that the bulk of the luminosity is shock powered. Furthermore, we detect concurrent but weak X-ray emission from deeply embedded shocks, confirming that the shock power does not appear in the X-ray band and supporting its emergence at longer wavelengths. Our data, spanning the spectrum from radio to gamma-ray, provide direct evidence that shocks can power substantial luminosity in classical novae and other optical transients. Simultaneous optical and gamma-ray observations of nova V906 Carinae reveal correlated flares in both wavelength ranges that can be linked to shocks in the nova ejecta. Weak X-ray emission suggests that the shocks are deeply embedded, but they contribute substantially to the luminosity of the nova.

引用

页码：776 / 780

页数：5

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