Close Binary Open Cluster Systems: A Gaia DR3 Perspective on Alessi 36 and Collinder 135

Hülya Karagöz; Deniz Cennet Çınar; Seval Taşdemir; Remziye Canbay

Article Details

Close Binary Open Cluster Systems: A Gaia DR3 Perspective on Alessi 36 and Collinder 135

Authors:

Hülya Karagöz | Deniz Cennet Çınar | Seval Taşdemir | Remziye Canbay

Publisher:

Bitlis Eren University

Main Topics:

Galactic Astronomy

Journal:

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Vol.14 Issue 3, pp.1942-1960

Document Type:

Article

Publication Date:

9/2025

Document Language:

English

Document ID (Org No.):

2001359272

pISSN:

2147-3129

Keywords:

Abstract:

 In this study, we examined the nearby open clusters OCs Alessi 36 and Collinder 135. Their spatial proximity was assessed using photometric and astrometric data from Gaia DR3. Likely member stars were identified based on a membership probability threshold P  0.5, yielding 230 members for Alessi 36 and 342 members for Collinder 135. The mean proper-motion components cos,  were determined as -9.6810.072, 7.0210.081 mas yr¹ for Alessi 36 and -10.0610.083, 6.2560.095 mas yr¹ for Collinder 135, the parallax-based distances d were found to be 2787 and 29911 pc, while their estimated ages t were 395 and 365 Myr for Alessi 36 and Collinder 135, respectively. The Galactic orbital analysis of Alessi 36 and Collinder 135 reveals nearly circular orbits with low eccentricities and minor fluctuations in their apogalactic and perigalactic distances. The maximum heights they attain above the Galactic plane are 0.0350.001 for Alessi 36 and 0.0740.003 kpc for Collinder 135, respectively, supporting their classification as part of the young stellar disc population.

 In this study, we examined the nearby open clusters OCs Alessi 36 and Collinder 135. Their spatial proximity was assessed using photometric and astrometric data from Gaia DR3. Likely member stars were identified based on a membership probability threshold P  0.5, yielding 230 members for Alessi 36 and 342 members for Collinder 135. The mean proper-motion components cos,  were determined as -9.6810.072, 7.0210.081 mas yr¹ for Alessi 36 and -10.0610.083, 6.2560.095 mas yr¹ for Collinder 135, the parallax-based distances d were found to be 2787 and 29911 pc, while their estimated ages t were 395 and 365 Myr for Alessi 36 and Collinder 135, respectively. The Galactic orbital analysis of Alessi 36 and Collinder 135 reveals nearly circular orbits with low eccentricities and minor fluctuations in their apogalactic and perigalactic distances. The maximum heights they attain above the Galactic plane are 0.0350.001 for Alessi 36 and 0.0740.003 kpc for Collinder 135, respectively, supporting their classification as part of the young stellar disc population.

 In this study, we examined the nearby open clusters OCs Alessi 36 and Collinder 135. Their spatial proximity was assessed using photometric and astrometric data from Gaia DR3. Likely member stars were identified based on a membership probability threshold P  0.5, yielding 230 members for Alessi 36 and 342 members for Collinder 135. The mean proper-motion components cos,  were determined as -9.6810.072, 7.0210.081 mas yr¹ for Alessi 36 and -10.0610.083, 6.2560.095 mas yr¹ for Collinder 135, the parallax-based distances d were found to be 2787 and 29911 pc, while their estimated ages t were 395 and 365 Myr for Alessi 36 and Collinder 135, respectively. The Galactic orbital analysis of Alessi 36 and Collinder 135 reveals nearly circular orbits with low eccentricities and minor fluctuations in their apogalactic and perigalactic distances. The maximum heights they attain above the Galactic plane are 0.0350.001 for Alessi 36 and 0.0740.003 kpc for Collinder 135, respectively, supporting their classification as part of the young stellar disc population.

 In this study, we examined the nearby open clusters OCs Alessi 36 and Collinder 135. Their spatial proximity was assessed using photometric and astrometric data from Gaia DR3. Likely member stars were identified based on a membership probability threshold P  0.5, yielding 230 members for Alessi 36 and 342 members for Collinder 135. The mean proper-motion components cos,  were determined as -9.6810.072, 7.0210.081 mas yr¹ for Alessi 36 and -10.0610.083, 6.2560.095 mas yr¹ for Collinder 135, the parallax-based distances d were found to be 2787 and 29911 pc, while their estimated ages t were 395 and 365 Myr for Alessi 36 and Collinder 135, respectively. The Galactic orbital analysis of Alessi 36 and Collinder 135 reveals nearly circular orbits with low eccentricities and minor fluctuations in their apogalactic and perigalactic distances. The maximum heights they attain above the Galactic plane are 0.0350.001 for Alessi 36 and 0.0740.003 kpc for Collinder 135, respectively, supporting their classification as part of the young stellar disc population.

Article Details

Close Binary Open Cluster Systems: A Gaia DR3 Perspective on Alessi 36 and Collinder 135

Authors:

Hülya Karagöz | Deniz Cennet Çınar | Seval Taşdemir | Remziye Canbay

Publisher:

Bitlis Eren University

Main Topics:

Galactic Astronomy

Journal:

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Vol.14 Issue 3, pp.1942-1960

Document Type:

Article

Publication Date:

9/2025

Document Language:

English

Document ID (Org No.):

2001359272

pISSN:

2147-3129

Alessi 36

Collinder 135

Binary open clusters

Open clusters

Galaxy: disc.

Issues

Article Details

Close Binary Open Cluster Systems: A Gaia DR3 Perspective on Alessi 36 and Collinder 135

Authors: Hülya Karagöz | Deniz Cennet Çınar | Seval Taşdemir | Remziye Canbay

Publisher: Bitlis Eren University

Main Topics: Galactic Astronomy

Journal: Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Vol.14 Issue 3, pp.1942-1960

Document Type: Article

Publication Date: 9/2025

Document Language: English

Document ID (Org No.): 2001359272

pISSN: 2147-3129

Alessi 36

Collinder 135

Binary open clusters

Open clusters

Galaxy: disc.

Issues

Authors:

Hülya Karagöz | Deniz Cennet Çınar | Seval Taşdemir | Remziye Canbay

Publisher:

Bitlis Eren University

Main Topics:

Galactic Astronomy

Journal:

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi Vol.14 Issue 3, pp.1942-1960

Document Type:

Article

Publication Date:

9/2025

Document Language:

English

Document ID (Org No.):

2001359272

pISSN:

2147-3129