A classical nova results from runaway thermonuclear explosions on the surface of a white dwarf that accretes matter from a low-mass main-sequence stellar companion. In 2012 and 2013, three novae were detected in gamma rays and stood in contrast to the first gamma-ray-detected nova V407 Cygni 2010, which belongs to a rare class of symbiotic binary systems. Despite likely differences in the compositions and masses of their white dwarf progenitors, the three classical novae are similarly characterized as soft-spectrum transient gamma-ray sources detected over 2- to 3-week durations. The gamma-ray detections point to unexpected high-energy particle acceleration processes linked to the mass ejection from thermonuclear explosions in an unanticipated class of Galactic gamma-ray sources.
Fermi establishes classical novae as a distinct class of gamma-ray sources / Ackermann M; Ajello M; Albert A; Baldini L; Ballet J; Barbiellini G; Bastieri D; Bellazzini R; Bissaldi E; Blandford RD; Bloom ED; Bottacini E; Brandt TJ; Bregeon J; Bruel P; Buehler R; Buson S; Caliandro GA; Cameron RA; Caragiulo M; Caraveo PA; Cavazzuti E; Charles E; Chekhtman A; Cheung CC; Chiang J; Chiaro G; Ciprini S; Claus R; Cohen-Tanugi J; Conrad J; Corbel S; DAmmando F; de Angelis A; den Hartog PR; de Palma F; Dermer CD; Desiante R; Digel SW; Di Venere L; Silva EDE; Donato D; Drell PS; Drlica-Wagner A; Favuzzi C; Ferrara EC; Focke WB; Franckowiak A; Fuhrmann L; Fukazawa Y; Fusco P; Gargano F; Gasparrini D; Germani S; Giglietto N; Giordano F; Giroletti M; Glanzman T; Godfrey G; Grenier IA; Grove JE; Guiriec S; Hadasch D; Harding AK; Hayashida M; Hays E; Hewitt JW; Hill AB; Hou X; Jean P; Jogler T; Johannesson G; Johnson AS; Johnson WN; Kerr M; Knodlseder J; Kuss M; Larsson S; Latronico L; Lemoine-Goumard M; Longo F; Loparco F; Lott B; Lovellette MN; Lubrano P; Manfreda A; Martin P; Massaro F; Mayer M; Mazziotta MN; McEnery JE; Michelson PF; Mitthumsiri W; Mizuno T; Monzani ME; Morselli A; Moskalenko IV; Murgia S; Nemmen R; Nuss E; Ohsugi T; Omodei N; Orienti M; Orlando E; Ormes JF; Paneque D; Panetta JH; Perkins JS; Pesce-Rollins M; Piron F; Pivato G; Porter TA; Raino S; Rando R; Razzano M; Razzaque S; Reimer A; Reimer O; Reposeur T; Parkinson PMS; Schaal M; Schulz A; Sgro C; Siskind EJ; Spandre G; Spinelli P; Stawarz L; Suson DJ; Takahashi H; Tanaka T; Thayer JG; Thayer JB; Thompson DJ; Tibaldo L; Tinivella M; Torres DF; Tosti G; Troja E; Uchiyama Y; Vianello G; Winer BL; Wolff MT; Wood DL; Wood KS; Wood M; Charbonnel S; Corbet RHD; Aquino ID; Edlin JP; Mason E; Schwarz GJ; Shore SN; Starrfield S; Teyssier F. - In: SCIENCE. - ISSN 0036-8075. - STAMPA. - 345:6196(2014), pp. 554-558. [10.1126/science.1253947]
Fermi establishes classical novae as a distinct class of gamma-ray sources
D'AMMANDO, FILIPPO;
2014
Abstract
A classical nova results from runaway thermonuclear explosions on the surface of a white dwarf that accretes matter from a low-mass main-sequence stellar companion. In 2012 and 2013, three novae were detected in gamma rays and stood in contrast to the first gamma-ray-detected nova V407 Cygni 2010, which belongs to a rare class of symbiotic binary systems. Despite likely differences in the compositions and masses of their white dwarf progenitors, the three classical novae are similarly characterized as soft-spectrum transient gamma-ray sources detected over 2- to 3-week durations. The gamma-ray detections point to unexpected high-energy particle acceleration processes linked to the mass ejection from thermonuclear explosions in an unanticipated class of Galactic gamma-ray sources.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
