2012AJ....144...98W

Query : 2012AJ....144...98W

2012AJ....144...98W - Astron. J., 144, 98 (2012/October-0)

Origin of the "He/N" and "Fe II" spectral classes of novae.

WILLIAMS R.

Abstract (from CDS):

The spectra of postoutburst novae display either He+N or Fe II lines as the most prominent non-Balmer lines at maximum light. Spectral diagnostics indicate physical conditions for "He/N" spectra that are consistent with their origin in the white dwarf (WD) ejecta, whereas "Fe II" spectra point to their formation in a large circumbinary envelope of gas whose origin is the secondary star. A determining parameter for which of the two types of spectra predominate may be the binary mass ratio Msec/MWD. The increasing fraction of novae that are observed to be "hybrid" objects, where both classes of spectra appear sequentially, is explained by changing parameters in the two emitting regions during the postoutburst decline. We argue that most novae may be hybrids that show both types of spectra during decline. The emission line intensity ratio O I λ8446/λ7773 is suggested as a good density diagnostic for the ejecta, and a finding list of emission lines identified in recent spectroscopic surveys of novae is presented as an aid to future line identification work.

Abstract Copyright: ∼

Journal keyword(s): novae, cataclysmic variables

Simbad objects: 49

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Number of rows : 49
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M31N 2006-10b No* 00 39 27.38 +40 51 09.8           ~ 9 0
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12643 1
3 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5838 1
4 V* KT Eri No* 04 47 54.2014586736 -10 10 42.962267424   14.986 14.705 15.099   ~ 128 0
5 LMCN 1991-04a No* 05 03 44.96 -70 18 13.5           ~ 62 0
6 LMCN 1988-10a No* 05 08 01.07 -68 37 37.5           ~ 37 0
7 LMCN 2005-11a No* 05 10 32.68 -69 12 35.7           ~ 20 0
8 LMCN 1992-11a No? 05 19 19.82 -68 54 35.0           ~ 29 0
9 LMCN 1990-01a No* 05 23 21.79 -69 29 48.4           ~ 61 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17428 0
11 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4936 2
12 LMCN 1988-03a No* 05 35 29.53 -70 21 30.9           ~ 50 0
13 V* V351 Pup No* 08 11 38.3931386664 -35 07 30.288675216           ~ 125 0
14 V* V597 Pup No* 08 16 17.9596509204 -34 15 24.933440401   21.65       ~ 51 0
15 V* T Pyx CV* 09 04 41.5061511720 -32 22 47.502932700           ~ 440 0
16 V* V382 Vel No* 10 44 48.3975221712 -52 25 31.168268472   15.945 15.737 16.173   ~ 192 0
17 V* V868 Cen No* 13 50 10.6971820608 -63 08 51.911816424           ~ 50 0
18 V* T CrB Sy* 15 59 30.1622265912 +25 55 12.613382940   11.516 10.247 9.70   M3IIIe_sh 732 0
19 V* V382 Nor No* 16 19 44.74 -51 34 53.1           ~ 34 0
20 V* V992 Sco No* 17 07 17.4574929720 -43 15 21.906348840           ~ 64 0
21 V* V2214 Oph No* 17 12 01.6941423448 -29 37 32.782241938           ~ 85 0
22 V* V1186 Sco CV* 17 12 51.2672500922 -30 56 37.699681585           ~ 42 0
23 V* V2573 Oph No* 17 19 14.086 -27 22 35.21           ~ 26 0
24 V* V2264 Oph No* 17 20 20.83 -26 46 26.3           ~ 44 0
25 V* V2295 Oph No* 17 25 06.41 -23 11 11.1           ~ 51 0
26 V* V1187 Sco No* 17 29 18.81 -31 46 01.5           ~ 49 0
27 V* V2575 Oph No* 17 33 13.1 -24 21 07           ~ 6 0
28 V* V2574 Oph No* 17 38 45.5056171106 -23 28 18.522955943           ~ 35 0
29 V* V378 Ser CV* 17 49 24.57 -12 59 59.2           ~ 24 0
30 V* RS Oph Sy* 17 50 13.1591484960 -06 42 28.480729788   11.884 10.776 11.228   K5.5/M0IIIe 1090 0
31 V* V977 Sco CV* 17 51 50.3646327864 -32 31 57.478406412           ~ 56 0
32 V* V745 Sco Sy* 17 55 22.2260994408 -33 14 58.551839808     17.987   13.353 M2/M6IIIe 241 1
33 V* V5558 Sgr No* 18 10 18.2602518799 -18 46 52.222364370           ~ 69 0
34 V* V5115 Sgr No* 18 16 59.04 -25 56 38.8           ~ 39 0
35 V* V5116 Sgr No* 18 17 50.7277266627 -30 26 32.079704535     19.181   18.962 ~ 67 0
36 V* V5114 Sgr No* 18 19 32.29 -28 36 35.7           ~ 43 0
37 V* V4169 Sgr No* 18 23 26.9491445472 -28 21 59.685983892           ~ 47 0
38 V* V3890 Sgr No* 18 30 43.2877623168 -24 01 08.944843980     15.944 14.798 12.611 M5III 206 0
39 V* V476 Sct No* 18 32 04.75 -06 43 34.3           ~ 29 0
40 V* V838 Her No* 18 46 31.4714863335 +12 14 02.104189516           ~ 297 0
41 V* V603 Aql No* 18 48 54.6369872232 +00 35 02.857106184 10.73 12.106 12.087 11.986   OB+e: 547 0
42 V* V443 Sct No* 18 49 38.95 -06 11 15.9           ~ 72 0
43 V* V1663 Aql No* 19 05 12.50 +05 14 12.0           Kep 34 0
44 V* V2491 Cyg CV* 19 43 01.9771342416 +32 19 13.549047276 18.27 18.72 18.03 17.72 17.41 ~ 164 0
45 V* V458 Vul PN 19 54 24.6304743344 +20 52 52.134341488   17.76 15.96 17.9   ~ 123 0
46 V* V1974 Cyg No* 20 30 31.6546001712 +52 37 50.837478240           ~ 579 0
47 V* V2362 Cyg CV* 21 11 32.3419758636 +44 48 03.668158208           ~ 104 0
48 V* OS And No* 23 12 05.76 +47 28 19.7           ~ 105 0
49 V* V705 Cas No* 23 41 47.2356232670 +57 31 00.826653715       16.055   ~ 197 0

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