2016A&A...588A..90L


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET07:01:07

2016A&A...588A..90L - Astronomy and Astrophysics, volume 588A, 90-90 (2016/4-1)

Discovery of an unusual bright eclipsing binary with the longest known period: TYC 2505-672-1/MASTER OT J095310.04+335352.8.

LIPUNOV V., GORBOVSKOY E., AFANASIEV V., TATARNIKOVA A., DENISENKO D., MAKAROV D., TIURINA N., KRUSHINSKY V., VINOKUROV A., BALANUTSA P., KUZNETSOV A., GRESS O., SERGIENKO Yu., YURKOV V., GABOVICH A., TLATOV A., SENIK V., VLADIMIROV V. and POPOVA E.

Abstract (from CDS):

We report on the MASTER Global Robotic Net discovery of an eclipsing binary, MASTER OT J095310.04+335352.8, previously known as unremarkable star TYC 2505-672-1, which displays extreme orbital parameters. The orbital period P=69.1yr is more than 2.5 times longer than that of Ε-Aurigae, which is the previous record holder. The light curve is characterized by an extremely deep total eclipse with a depth of more than 4.5mag, which is symmetrically shaped and has a total duration of 3.5yr. The eclipse is essentially gray. The spectra acquired with the Russian 6m BTA telescope both at minimum and maximum light mainly correspond to an M0-1III-type red giant, but the spectra taken at the bottom of eclipse show small traces of a sufficiently hot source. The observed properties of this system can be better explained as the red giant eclipsed by a large cloud (the disk) of small particles surrounding the invisible secondary companion.

Abstract Copyright: © ESO, 2016

Journal keyword(s): binaries: eclipsing - surveys - binaries: close - stars: individual: MASTER OT J095310.04+335352.8 (TYC 2505-672-1)

Simbad objects: 8

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Number of rows : 8

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 * gam Per Al* 03 04 47.7907410 +53 30 23.168725 4.08 3.63 2.93 2.34 1.89 G9III+A2-III: 193 1
2 * eps Aur Al* 05 01 58.1290610816 +43 49 23.871349520 3.86 3.53 2.99 2.47 2.02 A9Ia 553 0
3 TYC 2505-672-1 * 09 53 10.0011423144 +33 53 52.759347460   12.51 10.71     ~ 13 0
4 * alf Com ** 13 09 59.28520 +17 31 46.0389   4.77   4.1   F5V+F6V 190 0
5 V* V381 Sco Al* 17 47 03.4302288560 -35 47 06.776369802   12.55 11.32     A8II 15 0
6 V* V383 Sco Al* 17 53 34.4454380895 -38 05 00.659813835   11.54 10.55     F0Iab:e 8 0
7 * 31 Cyg Al* 20 13 37.9108031301 +46 44 28.738836638 5.50 5.08 3.80 2.83 2.07 K3Ib+B2IV-V 350 0
8 V* VV Cep Al* 21 56 39.1438495 +63 37 32.017439 7.03 6.65 4.90 3.19 1.85 M2epIa-Iab+B8:eV 423 1

    Equat.    Gal    SGal    Ecl

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2019.12.10-07:01:07

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