2017MNRAS.469.4116V


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.29CET01:30:37

2017MNRAS.469.4116V - Mon. Not. R. Astron. Soc., 469, 4116-4132 (2017/August-3)

Accurate pre- and post-eruption orbital periods for the dwarf/classical nova V1017 Sgr.

VARGAS-SALAZAR I., LEBLEU A., SCHAEFER B.E., LANDOLT A.U. and DVORAK S.

Abstract (from CDS):

V1017 Sgr is a classical nova (from 1919) that displayed an earlier dwarf nova eruption (from 1901) and underwent two more dwarf nova events (in 1973 and 1991). Previous work on this bright system in quiescence (V = 13.5) has consisted only of a few isolated magnitudes, a few spectra and an ambiguous claim of an orbital period of 5.714 d based on nine radial velocities. To test this period, we have collected 2896 magnitudes (plus 53 in the literature) in the UBVRIJHKL bands from 1897-2016, making an essentially complete photometric history of this unique cataclysmic variable. We find that the light curve in all bands is dominated by the ellipsoidal modulations of a G giant companion star, with a post-eruption (after the 1919 nova event) orbital period of 5.786290 ± 0.000032 d. This is the longest period for any classical nova; the accretion must be powered by the nuclear evolution of the companion star and dwarf nova events occur only because the outer parts of the large disc are cool enough to be unstable. Further, we measure the pre-eruption orbital period (from 1907-1916). The orbital period has decreased by 273 ± 61 parts per million across the 1919 eruption, with the significance of the period change being at the 5.7σ confidence level. This is startling and mystifying for nova theory, because the three known period-change effects cannot account for a period decrease in V1017 Sgr, much less one of such a large size.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: dwarf novae - stars: individual: V1017 Sgr - novae, cataclysmic variables - novae, cataclysmic variables

Status at CDS:   Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* GK Per No* 03 31 12.0096626899 +43 54 15.467450081   10.2 14.0     K1IV 861 0
2 V* QZ Aur No* 05 28 34.0777158013 +33 18 21.777186372           ~ 49 0
3 V* RR Pic No* 06 35 36.0633947411 -62 38 24.292758747   12.30 12.502   12.385 ~ 314 0
4 NOVA Pyx 1890 No* 09 04 41.5062068236 -32 22 47.503345173   7.0       ~ 376 1
5 NOVA Cen 2009 No* 13 31 15.8 -63 57 39           ~ 20 0
6 V* T CrB Sy* 15 59 30.1619486506 +25 55 12.607985109 2.69 2.10 2.00     M3III+p 643 0
7 V* X Ser No* 16 19 17.6862905727 -02 29 29.527844354           ~ 58 0
8 V* RS Oph No* 17 50 13.1592776879 -06 42 28.481553668   12.29 4.30     OB+M2ep 918 0
9 V* DQ Her No* 18 07 30.2510755201 +45 51 32.564649735   12.99 15.16 11.46   M3+Ve 954 1
10 V* V1017 Sgr No* 18 32 04.4737964965 -29 23 12.593546512           G5IIIp 123 0
11 CD-29 15053 * 18 32 05.5978184804 -29 23 09.904224492   11.76 10.25     K2III 2 0
12 V* RR Tel Sy* 20 04 18.5382966387 -55 43 33.154224077 9.93 11.33 10.81     WN3-6.5+M3.5-7 514 0
13 V* AE Aqr DQ* 20 40 09.1598509019 -00 52 15.057042857   12.46 10.40   10.191 K3-5IV/V 602 0
14 V* HR Del No* 20 42 20.3467536529 +19 09 39.304605595   12.46 3.70 12.69   ~ 457 0
15 V* V1500 Cyg No* 21 11 36.5811336631 +48 09 01.950330133   17.9       ~ 736 0

    Equat.    Gal    SGal    Ecl

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2020.03.29-01:30:37

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