Speckle Interferometry at the OAN-SPM Mexico: Multiband Astrometry of Double Stars Measured in 2018 and 2019
Por:
Guerrero, C. A., Zepeda, C. E., Souza, T. B., Najera, M. R., Fernandes, M. Borges, Hernandez-Aguila, J. B., Carvajal, J. C., Castro-Chacon, J. H., Hernandez-Valencia, B., Reyes-Ruiz, M., Sanchez, E., Silva, J. S.
Publicada:
1 jun 2021
Resumen:
In this paper we present multiband speckle interferometric measurements
of double stars performed at the 2.1 m telescope of the Observatorio
Astronomico Nacional, San Pedro Martir, Mexico. We focused our efforts
on objects from the Washington Double Star Catalog that were observed
during five runs allocated in 2018 and 2019. We report here 2101
astrometric and 2027 photometric measurements of 631 pairs, with angular
separations ranging from 0.'' 05 to 6.'' 09, including 1622 measurements
with separations smaller than 1 `', and a magnitude difference up to
5.99 mag through the V filter, 5.46 mag for the R filter, and 5.85 mag
for the I filter. We estimated a mean error in separation of 12 mas,
1.degrees 1 in position angle, and 0.14 mag for the magnitude
difference. We confirmed 58 double stars discovered by Hipparcos. For
the first time we are presenting astrometric measurements for 7 systems
listed at the Washington Double Star Catalog as being suspected
binaries, which did not have a secondary confirmation, and 15 stars with
only one published measurement. We identified a new close companion with
a mean angular separation of 0.'' 10, detected in a previously known
pair. Finally, we present a correction to two previously published
orbital solutions of two visual binaries.
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Astron, AP 106, Ensenada 22860, Baja California, Mexico
Univ Autonoma Baja California, Blvd Univ 1000 Valle Las Palmas, Tijuana 22260, BC, Mexico
Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Sao Cristovao, RJ, Brazil
Univ Nacl Autonoma Mexico, Inst Astron, CONACYT, AP 106, Ensenada 22860, Baja California, Mexico
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