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


Query : 2016A&A...588A..90L

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 - 2023
#notes
1 * gam Per EB* 03 04 47.7907410 +53 30 23.168725 4.08 3.63 2.93 2.34 1.89 G9III+A2-III: 204 0
2 * eps Aur EB* 05 01 58.1343686760 +43 49 23.917115316 3.86 3.53 2.99 2.47 2.02 A9Ia 570 0
3 TYC 2505-672-1 * 09 53 10.0011302112 +33 53 52.756520568   12.51 10.71     ~ 18 0
4 * alf Com ** 13 09 59.28520 +17 31 46.0389 4.71 4.77 4.32 4.1   F5V+F6V 197 0
5 V* V381 Sco EB* 17 47 03.4298540304 -35 47 06.770188932   12.55 11.32     A8II 19 0
6 V* V383 Sco EB* 17 53 34.4453576208 -38 05 00.659499540   11.54 10.55     F0Iab:e 9 0
7 * 31 Cyg EB* 20 13 37.9082370480 +46 44 28.761618048 5.50 5.08 3.80 2.83 2.07 K3Ib+B2IV-V 360 0
8 V* VV Cep EB* 21 56 39.1438495 +63 37 32.017439 7.03 6.65 4.90 3.19 1.85 M2epIa-Iab+B8:eV 441 1

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2022.11.27-17:33:43

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