Title: Astrometric Measurements of WDS 22267+4433 ES 1346 AC
The double star system WDS 22267+4433 ES 1346 AC was observed using the Las Cumbres Global Telescope Network (LCOGT) 0.4 meter telescope on October 19th, 2023. Upon observation, the position angle was 359.97° and the separation was 7.997″. This data was compared to historical data acquired from the Washington Double Star Catalog, the US Naval Observatory, and the Gaia Database. Because Gaia DR3 does not have parallax and proper motion values for the primary or secondary stars of this system, a comparison to the C component could not be made. more »« less
Perez_Vazquez, M M; Perez_Lopez, I M; Gonzalez_Claudio, V A; Padilla_Oyola, D R; Pantoja_Pantoja, C A; Lebron_Santos, M E; Storrie-Lombardi, L; Gomez, E; Hopkinson, A; Freed, R; et al
(, Journal of double star observations)
Freed, R; Harshaw, R; Genet, Russell M
(Ed.)
We report the measurement of the position angle and separation for the double star system HD 80460. We made use of a 0.4m telescope from Las Cumbres Observatory (LCOGT) and a DeltaRho 350 + QHY600 camera. An analysis was made with the historical data from the Washington Double Star (WDS) catalog. A search was made with SIMBAD for spectral type, parallax, and proper motion for the double star.
Marcel, M C; Gerald, J L; Bvumbwe, B; Sani, I A; Pius, P; Ekwu, O M; Sudum, E; Olayiwola, J U
(, Journal of Double Star Observations)
Freed, R; Harshaw, R; Genet, Russell M
(Ed.)
WDS 03286+2523 BRT 133, is a double-star system that has been under observation since 1896. In this study, we present new measurements of the position angle and separation of the system, utilizing data obtained from a web telescope with a Charged Couple Device (CCD) camera, Gaia EDR3, and historical records. We determined that the position angle and separation are 222.4° and 5.35", respectively, indicating a slight increase from the previous values of 222° and 5.34" measured in 2004. We also employed the parallax and the ratio of proper motion metric (rPM) values of the system to assess its binarity. This analysis showed that the system may be gravitationally bound and with a long orbital period.
Andrukhiv, V; Lys, S; Marcel, M C
(, Journal of Double Star Observations)
Freed, R; Harshaw, R; Genet, Russell M
(Ed.)
This research delves into the analysis of the WDS 18234-4819 B 938 double-star system situated within the Telescopium constellation. Utilizing our observations, data from the Gaia Data Release 3 mission, and historical records, new measurements of the position angle and separation were acquired. The results indicate a position angle of 342.6° and a separation of 8.39", showcasing an observable increase in comparison to historical data. Furthermore, an exploration of the parallax and proper motion values suggests disparate distances from Earth and a lack of gravitational binding between the stars. Consequently, the WDS 18234-4819 B 938 double-star system is classified as an optical double. To affirm this conclusion, we advocate for future studies to monitor dynamic changes in system parameters.
Marcel, M C; Sani, I A; JGerald, J L; Pius, P; Ekwu, O M; Bvumbwe, B; Sudum, E; Olayiwola, J U
(, Journal of Double Star Observations)
Freed, R; Harshaw, R; Genet, Russell M
(Ed.)
We report new measurements of the position angle and separation of the double star WDS 03245+5938 STI 450, based on our observations, Gaia EDR3, and historical data. We find that the position angle and separation are 209.7° and 7.68", respectively, showing slight changes from the previous values of 210° and 7.742". We also find that the distances between the two stars are far apart, suggesting that the system is an optical double, and therefore not gravitationally bound together. Furthermore, we find that the ratio of proper motion (rPM) metric of the system is distinct, indicating that the system is a chance alignment of two unrelated stars that are at different distances.
Barnett, Joseph W.; Williams, Kurtis A.
(, Proceedings of the International Astronomical Union)
null
(Ed.)
Abstract The study of white dwarfs, the end stage of stellar evolution for more than 95% of stars, is critical to bettering our understanding of the late stages of the lives of low mass stars. In particular, the post main sequence evolution of binary star systems is complex, and the identification and analysis of double degenerate systems is a crucial step in constraining models of binary star systems. Binary white dwarfs in open star clusters are particularly useful because cluster parameters such as distance, metal content, and total system age are more tightly constrained than for field double degenerates. Here we use the precision astrometry from the Gaia Data Release 2 catalog to study two other white dwarfs which were identified as candidate double degenerates in the field of the open star cluster NGC 6633. One of the two objects, LAWDS 4, is found to have astrometric properties fully consistent with that of the cluster. In such a case, the object is significantly overluminous for a single white dwarf, strongly indicating binarity. The second candidate binary, LAWDS 7, appears to be inconsistent with cluster membership, though a more thorough analysis is necessary to properly quantify the probability. At present we are proceeding to model the photometric and spectroscopic data for both objects as if they were cluster member double degenerates. Results of this latter analysis are forthcoming. Our results will add crucial data to the study of binary star evolution in open star clusters.
Johnson, A, Jenson, N, Sagehorn, J, Kozubal, J, and Ruiz, D. Astrometric Measurements of WDS 22267+4433 ES 1346 AC. Retrieved from https://par.nsf.gov/biblio/10554466. Journal of double star observations 20.3
Johnson, A, Jenson, N, Sagehorn, J, Kozubal, J, & Ruiz, D. Astrometric Measurements of WDS 22267+4433 ES 1346 AC. Journal of double star observations, 20 (3). Retrieved from https://par.nsf.gov/biblio/10554466.
Johnson, A, Jenson, N, Sagehorn, J, Kozubal, J, and Ruiz, D.
"Astrometric Measurements of WDS 22267+4433 ES 1346 AC". Journal of double star observations 20 (3). Country unknown/Code not available: Online Journal - http://wwwjdsoorg. https://par.nsf.gov/biblio/10554466.
@article{osti_10554466,
place = {Country unknown/Code not available},
title = {Astrometric Measurements of WDS 22267+4433 ES 1346 AC},
url = {https://par.nsf.gov/biblio/10554466},
abstractNote = {The double star system WDS 22267+4433 ES 1346 AC was observed using the Las Cumbres Global Telescope Network (LCOGT) 0.4 meter telescope on October 19th, 2023. Upon observation, the position angle was 359.97° and the separation was 7.997″. This data was compared to historical data acquired from the Washington Double Star Catalog, the US Naval Observatory, and the Gaia Database. Because Gaia DR3 does not have parallax and proper motion values for the primary or secondary stars of this system, a comparison to the C component could not be made.},
journal = {Journal of double star observations},
volume = {20},
number = {3},
publisher = {Online Journal - http://wwwjdsoorg},
author = {Johnson, A and Jenson, N and Sagehorn, J and Kozubal, J and Ruiz, D},
editor = {Freed, R and Harshaw, R and Genet, Russell M}
}
Warning: Leaving National Science Foundation Website
You are now leaving the National Science Foundation website to go to a non-government website.
Website:
NSF takes no responsibility for and exercises no control over the views expressed or the accuracy of
the information contained on this site. Also be aware that NSF's privacy policy does not apply to this site.