Eruptive stars spectroscopy Cataclysmics, Symbiotics, Novae ARAS Eruptive Stars Information Letter n° 34 #2017-04 06-05-2017 Observations of April 2017 Contents Symbiotics Ongoing campaign CH Cygni AG Dra campaign AX Per in eclipse New burst of BF Cyg SU Lyn: monitoring of the newly discovered symbiotic V694 Mon: new results Call for spectroscopic monitoring in AAVSO Alert Notice by Adrian Lucy and Jeno Sokolovski: p. 53 AG Dra campaign, Rudolf Galis p. 7 and p. 55 Steve’s notes: Common envelope, mergers, and booms p. 56-60 New publications about Symbiotics and Novae Authors : F. Teyssier, S. Shore, R. Gàlis, J. Guarro, D. Boyd, P. Somogyi, O. Garde, W. Sims, T. Lester, C. Buil, P. Berardi, U. Sollecchia, F. Campos, J. Foster, JP Masviel, JP Nougayrede, J. Montier, T. Rodda, F. Boubault, J. Edlin, M. Verlinden, S. Cuthbert, Y. Buchet, G. Martineau, JP. Godard, C. Boussin “We acknowledge with thanks the variable star observations from the AAVSO International Database contributed by observers worldwide and used in this letter.” Kafka, S., 2015, Observations from the AAVSO International Database, http://www.aavso.org S Symbiotics in April Y M AG Dra: new campaign See p. 4 B I AX Per : eclipse O CH Cygni : ongoing campaign T upon the request of Augustin Skopal and Margarita Karovska I SU Lyn: observations requested by Katarzyna Drozd (Nicolaus Copernicus Astronomical Centre) C S V694 Mon: still in ‘quiescent’ stage Observing : main targets During spring have a look on classical symbiotics V443 Her, YY Her and recurrent nova RS Oph Name AD (2000) DE (2000) AG Dra 16 1 40.5 +66 48 9.5 AG Peg 21 51 1.9 +12 37 29.4 AX Per 01 36 22.7 +54 15 2.5 BF Cyg 19 23 53.4 +29 40 25.1 BX Mon 07 25 24 -03 36 00 CH Cyg 19 24 33 +50 14 29.1 CI Cyg 19 50 11.8 +35 41 03.2 EG And 00 44 37.1 +40 40 45.7 R Aqr 23 43 49.4 -15 17 04.2 RS Oph 17 50 13.2 -06 42 28.4 SU Lyn 06 42 55.1 +55 28 27.2 T CrB 15 59 30.1 +25 55 12.6 V443 Her 18 22 8.4 +23 27 20 V694 Mon 07 25 51.2 -07 44 08 Z And 23 33 39.5 +48 49 5.4 ARAS Eruptive Stars Information Letter 2017-03 - p. 2 S Symbiotics in ARAS Data Base Update : 02-05-2017 Y 48 stars M 2424 spectra B I # Name AD (2000) DE (2000) Nb. of spectra First spectrum Last spectrum Days Since Last O 1 EG And 0 44 37.1 40 40 45.7 70 12/08/2010 14/02/2017 77 2 AX Per 1 36 22.7 54 15 2.5 159 04/10/2011 02/04/2017 30 T 3 V471 Per 1 58 49.7 52 53 48.4 7 06/08/2013 20/02/2017 71 4 Omi Cet 2 19 20.7 -2 58 39.5 12 28/11/2015 09/02/2017 82 I 5 BD Cam 3 42 9.3 63 13 0.5 27 08/11/2011 09/02/2017 82 C 6 UV Aur 5 21 48.8 32 30 43.1 57 24/02/2011 18/04/2017 14 7 V1261 Ori 5 22 18.6 -8 39 58 11 22/10/2011 26/03/2017 37 S 8 StHA 55 5 46 42 6 43 48 2 17/01/2016 25/01/2016 463 9 SU Lyn 06 42 55.1 +55 28 27.2 50 02/05/2016 25/04/2017 7 10 ZZ CMi 7 24 13.9 8 53 51.7 45 29/09/2011 18/04/2017 14 11 BX Mon 7 25 24 -3 36 0 45 04/04/2011 11/04/2017 21 12 V694 Mon 7 25 51.2 -7 44 8 206 03/03/2011 21/04/2017 11 13 NQ Gem 7 31 54.5 24 30 12.5 59 01/04/2013 18/04/2017 14 14 GH Gem 7 4 4.9 12 2 12 5 10/03/2016 20/02/2017 71 15 CQ Dra 12 30 06 69 12 04 17 11/06/2015 21/04/2017 11 16 TX CVn 12 44 42 36 45 50.6 41 10/04/2011 18/04/2017 14 17 IV Vir 14 16 34.3 -21 45 50 3 28/02/2015 20/06/2016 316 18 T CrB 15 59 30.1 25 55 12.6 182 01/04/2012 01/05/2017 1 19 AG Dra 16 1 40.5 66 48 9.5 223 03/04/2013 01/05/2017 1 20 V503 Her 17 36 46 23 18 18 2 05/06/2013 13/08/2016 262 21 RS Oph 17 50 13.2 -6 42 28.4 33 23/03/2011 01/09/2016 243 22 V934 Her 17 6 34.5 23 58 18.5 20 09/08/2013 08/04/2017 24 23 AS 270 18 05 33.7 -20 20 38 2 01/08/2013 02/08/2013 1369 24 YY Her 18 14 34.3 20 59 20 19 25/05/2011 15/07/2016 291 25 FG Ser 18 15 6.2 0 18 57.6 3 26/06/2012 24/07/2014 1013 26 StHa 149 18 18 55.9 27 26 12 3 05/08/2013 14/10/2015 566 27 V443 Her 18 22 8.4 23 27 20 34 18/05/2011 08/04/2017 24 28 FN Sgr 18 53 52.9 -18 59 42 4 10/08/2013 02/07/2014 1035 29 BF Cyg 19 23 53.4 29 40 25.1 111 01/05/2011 23/04/2017 9 30 CH Cyg 19 24 33 50 14 29.1 440 21/04/2011 25/04/2017 7 31 V919 Sgr 19 3 46 -16 59 53.9 2 10/08/2013 10/08/2013 1361 32 V1413 Aql 19 3 51.6 16 28 31.7 6 10/08/2013 31/10/2016 183 33 V335 Vul 19 23 14 +24 27 39.7 7 14/08/2016 31/10/2016 183 34 HM Sge 19 41 57.1 16 44 39.9 9 20/07/2013 26/08/2016 249 35 QW Sge 19 45 49.6 18 36 50 7 14/08/2016 31/10/2016 183 36 CI Cyg 19 50 11.8 35 41 3.2 133 25/08/2010 23/04/2017 9 37 StHa 169 19 51 28.9 46 23 6 2 12/05/2016 14/05/2016 353 38 V1016 Cyg 19 57 4.9 39 49 33.9 12 15/04/2015 01/12/2016 152 39 PU Vul 20 21 12 21 34 41.9 12 20/07/2013 06/10/2016 208 40 LT Del 20 35 57.3 20 11 34 1 28/11/2015 28/11/2015 521 41 ER Del 20 42 46.4 8 40 56.4 5 02/09/2011 31/08/2016 244 42 V1329 Cyg 20 51 1.1 35 34 51.2 8 08/08/2015 26/12/2016 127 43 V407 Cyg 21 2 13 45 46 30 12 14/03/2010 18/04/2010 0 44 StHa 190 21 41 44.8 2 43 54.4 17 31/08/2011 30/10/2016 184 45 AG Peg 21 51 1.9 12 37 29.4 201 06/12/2009 25/01/2017 97 46 V627 Cas 22 57 41.2 58 49 14.9 20 06/08/2013 24/03/2017 39 47 Z And 23 33 39.5 48 49 5.4 78 30/10/2010 18/02/2017 73 ARAS Data Base Symbiotics : http://www.astrosurf.com/aras/Aras_DataBase/Symbiotics.htm ARAS Eruptive Stars Information Letter 2017-03 - p. 3 S Symbiotics observed in April, 2017 1/3 Y M B I Name Observer Date l min l max Resolution AG Dra F. Campos 02/04/2017 3716 7258 818 O AG Dra W. Sims 02/04/2017 3864 7450 818 AG Dra J. Guarro 02/04/2017 3980 7498 11000 T AG Dra F. Teyssier 02/04/2017 4208 7397 11000 AG Dra O. Garde 05/04/2017 4186 7314 11000 I AG Dra D. Boyd 06/04/2017 3901 7379 763 AG Dra F. Teyssier 06/04/2017 4210 7150 11000 C AG Dra J. Montier 07/04/2017 3809 7398 660 AG Dra F. Campos 07/04/2017 3728 7263 833 S AG Dra J. Guarro 07/04/2017 3980 7498 11000 AG Dra T. Rodda 08/04/2017 3801 7381 587 AG Dra U. Sollecchia 08/04/2017 3750 7360 911 AG Dra T. Lester 09/04/2017 6023 7122 9000 AG Dra W. Sims 10/04/2017 3866 7452 790 AG Dra C. Buil 10/04/2017 6819 6865 48000 AG Dra C. Buil 10/04/2017 6546 6590 48000 AG Dra C. Buil 10/04/2017 5844 5884 48000 AG Dra C. Buil 10/04/2017 4674 4706 48000 AG Dra F. Teyssier 11/04/2017 4300 7150 11000 AG Dra T. Rodda 12/04/2017 3801 7381 586 AG Dra F. Campos 12/04/2017 6431 7198 6327 AG Dra O. Garde 12/04/2017 4186 7314 11000 AG Dra W. Sims 13/04/2017 3866 7452 741 AG Dra J. Edlin 13/04/2017 3813 7301 807 AG Dra U.