2017A&A...603A..72B


Query : 2017A&A...603A..72B

2017A&A...603A..72B - Astronomy and Astrophysics, volume 603A, 72-72 (2017/7-1)

MN Draconis: a peculiar, active dwarf nova in the period gap.

BAKOWSKA K., OLECH A., POSPIESZYNSKI R., SWIERCZYNSKI E., MARTINELLI F., RUTKOWSKI A., KOFF R., DROZD K., BUTKIEWICZ-BAK M. and KANKIEWICZ P.

Abstract (from CDS):

Context. We present results of an extensive world-wide observing campaign of MN Draconis.
Aims. MN Draconis is a poorly known active dwarf nova in the period gap and is one of only two known cases of period-gap SU UMa objects showing negative superhumps. The photometric behaviour of MN Draconis poses a challenge for existing models of the superhump and superoutburst mechanisms. Therefore, a thorough investigation of peculiar systems like MN Draconis is crucial for our understanding of the evolution of close binary stars.
Methods. To measure the fundamental parameters of the system, we collected photometric data in October 2009, June-September 2013, and June-December 2015. We analysed the light curves, O-C diagrams, and power spectra.
Results. During our three observational seasons we detected four superoutburts and several normal outbursts. Based on the two consecutive superoutbursts detected in 2015, the supercycle length was derived as Psc=74±0.5-days, and it has been increasing with a rate of dP/dt=3.3x10–3 during the past twelve years. Based on the positive and negative superhumps, we calculated the period excess ε=5.6%±0.1%, the period deficit ε=2.5%±0.6%, and as a result, the orbital period Porb=0.0994(1)days (143.126±0.144min). We updated the basic light curve parameters of MN Draconis.
Conclusions. MN Draconis is the first discovered SU UMa system in the period gap with an increasing supercycle length.

Abstract Copyright: © ESO, 2017

Journal keyword(s): binaries (including multiple): close - stars: individual: MN Draconis - novae, cataclysmic variables - stars: dwarf novae - stars: dwarf novae

VizieR on-line data: <Available at CDS (J/A+A/603/A72): 2009.dat 2013.dat 2015.dat>

CDS comments: Comparison stars not identified.

Simbad objects: 13

goto Full paper

goto View the references in ADS

Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* V452 Cas CV* 00 52 18.0064110240 +53 51 50.145348528           ~ 28 0
2 V* TU Men CV* 04 41 40.7061732720 -76 36 45.942303384         14.057 ~ 153 0
3 V* SU UMa CV* 08 12 28.2695986944 +62 36 22.427676396           B2 490 0
4 V* GZ Cnc CV* 09 15 51.6769229568 +09 00 49.657853448           ~ 37 0
5 V* BK Lyn CV* 09 20 11.2020621696 +33 56 42.356468364   13.97 13.99 14.72   ~ 109 1
6 V* RZ LMi CV* 09 51 48.9263549904 +34 07 23.966634108           ~ 110 0
7 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 421 2
8 V* NY Ser CV* 15 13 02.2954585632 +23 15 08.407860084   15.648 15.699     ~ 68 0
9 CRTS J162520.3+120309 CV* 16 25 20.2964446176 +12 03 08.853233040   18.6   17.9   D+M 21 0
10 OGLE BLG-DN-1 CV* 17 53 10.0369078423 -29 21 20.511496686         17.034 ~ 9 0
11 UCAC3 206-168738 CV* 18 30 01.7589515136 +12 33 46.216260180   14.79 14.48   14.54 ~ 9 0
12 V* V1006 Cyg CV* 19 48 47.1957532416 +57 09 22.393708164           ~ 28 0
13 V* MN Dra CV* 20 23 38.1862508040 +64 36 26.592618240           ~ 43 1

To bookmark this query, right click on this link: simbad:objects in 2017A&A...603A..72B and select 'bookmark this link' or equivalent in the popup menu


2023.02.09-10:33:28

© Université de Strasbourg/CNRS

    • Contact