2005A&A...431..269R

Query : 2005A&A...431..269R

2005A&A...431..269R - Astronomy and Astrophysics, volume 431269-277 (2005/2-3)

Detection of the white dwarf and the secondary star in the new SU UMa dwarf nova HS2219+1824.

RODRIGUEZ-GIL P., GAENSICKE B.T., HAGEN H.-J., MARSH T.R., HARLAFTIS E.T., KITSIONAS S. and ENGELS D.

Abstract (from CDS):

We report the discovery of a new, non-eclipsing SU UMa-type dwarf nova, HS2219+1824. Photometry obtained in quiescence (V≃17.5) reveals a double-humped light curve from which we derive an orbital period of ≃86.2min. Additional photometry obtained during a superoutburst reaching V≃12.0 clearly shows superhumps with a period of ≃89.05min. The optical spectrum contains double-peaked Balmer and HeI emission lines from the accretion disc as well as broad absorption troughs of Hβ, Hγ, and Hδ from the white dwarf primary star. Modelling of the optical spectrum implies a white dwarf temperature of 13000K≲Teff≲17000K, a distance of 180pc≲d≲230pc, and suggests that the spectral type of the donor star is later than M 5. Phase-resolved spectroscopy obtained during quiescence reveals a narrow Hα emission line component which has a radial velocity amplitude and phase consistent with an origin on the secondary star, possibly on the irradiated hemisphere facing the white dwarf. This constitutes the first detection of line emission from the secondary star in a quiescent SU UMa star.

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - stars: binaries: close - stars: individual: HS2219+1824 - stars: novae, cataclysmic variables - stars: dwarf novae

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* WX Cet CV* 01 17 04.1794193856 -17 56 22.414606224           ~ 173 0
2 V* V1294 Tau CV* 04 00 37.2551443560 +06 22 45.921425232   15.6       ~ 29 0
3 V* TU Men CV* 04 41 40.7061732720 -76 36 45.942303384         14.057 ~ 157 0
4 V* MU Cam XB* 06 25 16.2519466536 +73 34 39.105603804       14.3   ~ 77 0
5 V* V482 Cam CV* 07 33 41.4126954912 +67 32 15.629343864           ~ 25 0
6 V* DW Cnc CV* 07 58 53.0399000904 +16 16 45.169158720           ~ 85 0
7 V* SU UMa CV* 08 12 28.2695986944 +62 36 22.427676396           B2 516 0
8 V* GY Cnc CV* 09 09 50.5407550968 +18 49 47.429496300           ~ 87 0
9 PG 0911-066 CV* 09 14 14.0293028112 -06 47 44.773184220   17.6   19.1   ~ 45 0
10 V* SW Sex CV* 10 15 09.3769935988 -03 08 32.850732738           ~ 223 0
11 V* RZ Leo CV* 11 37 22.2524330304 +01 48 58.617459936     19.6     DA+dM2 170 0
12 V* BC UMa CV* 11 52 15.8342499696 +49 14 41.887768632           DC: 112 0
13 V* IR Com CV* 12 39 32.0200256880 +21 08 06.265467672           DA+M 57 0
14 V* HV Vir CV* 13 21 03.1661521320 +01 53 29.075499492           DA 162 0
15 V* KV Dra CV* 14 50 38.3283335160 +64 03 29.003633136           DQ 38 0
16 V* GW Lib No* 15 19 55.3333785336 -25 00 24.614534520           DA: 228 0
17 V* V893 Sco CV* 16 15 14.9804783976 -28 37 32.113386876           ~ 95 0
18 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20 10.817   D 982 0
19 2MASS J22214218+1841316 * 22 21 42.1849643352 +18 41 31.486247556   16.2 15.7     ~ 1 0
20 V* V521 Peg CV* 22 21 44.7931808160 +18 40 08.201442360           ~ 35 0
21 HS 2237+8154 WD* 22 37 15.5608684464 +82 10 27.358012308           DA2.8 23 0
22 V* V455 And CV* 23 34 01.4484962496 +39 21 40.866079356   16.220 16.094 16.137   DQ 166 0
23 V* BW Scl CV* 23 53 00.8741941392 -38 51 46.662458688   16.7       D 85 0

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