A Feasibility Study on the Direct Imaging of Exoplanets with the DAG Telescope

Öz

The 4-meter DAG Telescope, recently installed at the Eastern Anatolian Observatory, is equipped with a coronagraph, an instrument employed only on a few telescopes worldwide. Direct imaging observations, coupled with the telescope's adaptive optics correction, will allow the identification of planets, brown dwarfs, or stellar components around stars. In this study, contrast ratios of known planetary systems with orbital periods longer than one year were computed in order to determine the systems suitable for direct imaging observations with the PLACID instrument which is going to be operational at the diffraction limited focus of the telescope. The method for these calculations was tested with a directly imaged control sample compiled from the literature. Planet-to-host star contrast ratios were calculated for 356 of the 685 systems compiled from reliable exoplanet catalogs. Among those 356 systems, 21 were identified as suitable for direct imaging with the DAG Telescope.

Anahtar Kelimeler

• exoplanets
• techniques: high angular resolution
• instrumentation: adaptive optics

DAG Teleskobu ile Ötegezegenlerin Doğrudan Görüntülenmesi Üzerine Bir Öngörü Çalışması

Öz

Doğu Anadolu Gözlemevi'nde kurulumu tamamlanmış olan 4m'lik DAG Teleskobu dünyada yalnızca birkaç teleskopta bulunan koronografla donatılmış durumdadır. Doğrudan görüntüleme tekniği ile yapılacak gözlemler, teleskobun adaptif optik düzeltmesinin de yardımıyla yıldızların etrafında gezegen, kahverengi cüce veya yıldız bileşenlerinin belirlenmesine olanak tanıyacaktır. Bu çalışmada bilinen ötegezegen sistemlerinden yörünge periyodu bir yıldan büyük olan sistemlerin kontrast değerleri hesaplanmaya çalışılmış ve DAG Teleskobunun kırınım sınırlı odağında çalışacak olan PLACID koronografıyla görüntülenebilecek olan sistemler belirlenmiştir. Hesaplamaların doğruluğu literatürden derlenen doğrudan görüntülenmiş bir kontrol örneklemi ile test edilmiştir. Güvenilir ötegezegen kataloglarından derlenen 685 sistemden 356'sının gezegen/barınak yıldız kontrast oranı hesaplanabilmiştir. Kontrast değerleri elde edilen 356 sistemden 21'inin DAG Teleskobu ile görüntülenebileceği tespit edilmiştir.

Anahtar Kelimeler

• exoplanets
• techniques: high angular resolution
• instrumentation: adaptive optics

Kaynakça

1. Ahn K., ve dig., 2023, A&A, 673, A29
2. Alis S., Kaptan S., Bastürk Ö., Yesilyaprak C., 2024, in EAS2024,European Astronomical Society Annual Meeting. p. 249
3. Allard F., 2014, in Booth M., Matthews B. C., Graham J. R., eds, IAU Symposium Vol. 299, Exploring the Formation and Evolution of Planetary Systems. pp 271–272, doi:10.1017/S1743921313008545
4. Arras P., Bildsten L., 2006, ApJ, 650, 394
5. Balbay R., Tugrul Tezcan C., Shaemoni Niaei M., Satır O., Yesilyaprak C., 2020, in Pizzo R., Deul E. R., Mol J. D., dePlaa J., Verkouter H., eds, Astronomical Society of the Pacific Conference Series Vol. 527, Astronomical Data Analysis Software and Systems XXIX. p. 567
6. Baraffe I., Chabrier G., Barman T. S., Allard F., Hauschildt P. H., 2003, A&A, 402, 701
7. Bayo A., Rodrigo C., Barrado Y Navascués D., Solano E., Gutiérrez R., Morales-Calderón M., Allard F., 2008, A&A, 492, 277
8. Bear E., Soker N., 2014, MNRAS, 444, 1698

9. Beichman C., ve dig., 2025, AJ, 169, 17
10. Bessell M. S., Castelli F., Plez B., 1998, A&A, 333, 231, ADS
11. Best W. M. J., Liu M. C., Dupuy T. J., Magnier E. A., 2017, ApJ, 843, L4
12. Beuzit J. L., ve dig., 2019, A&A, 631, A155
13. Biller B. A., ve dig., 2010, ApJ, 720, L82
14. Bohn A. J., ve dig., 2021, A&A, 648, A73
15. Bonavita M., ve dig., 2022, MNRAS, 513, 5588
16. Bonnefoy M., ve dig., 2013, A&A, 555, A107
17. Boss A. P., 1997, Science, 276, 1836
18. Bowler B. P., Liu M. C., Shkolnik E. L., Dupuy T. J., 2013, ApJ, 774, 55
19. Cameron A. G. W., 1978, Structure and evolution of giant gaseous protoplanets., Reports of planetary geology program, 1977 - 1978, p. 13 - 15
20. Carson J., ve dig., 2013, ApJ, 763, L32
21. Castelli F., Kurucz R. L., 2003, in Piskunov N., Weiss W. W., Gray D. F., eds, IAU Symposium Vol. 210, Modelling of Stellar Atmospheres. p. A20 (arXiv:astro-ph/0405087), doi:10.48550/arXiv.astro-ph/0405087
22. Chauvin G., 2018, in Close L. M., Schreiber L., Schmidt D., eds, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series Vol. 10703, Adaptive Optics Systems VI. p. 1070305 (arXiv:1808.02454), doi:10.1117/12.2314273
23. Chauvin G., Lagrange A. M., Dumas C., Zuckerman B., Mouillet D., Song I., Beuzit J. L., Lowrance P., 2004, A&A, 425, L29
24. Chauvin G., ve dig., 2017, A&A, 605, L9
25. Cheetham A., ve dig., 2018, A&A, 615, A160
26. Choi J., Dotter A., Conroy C., Cantiello M., Paxton B., Johnson B. D., 2016, ApJ, 823, 102
27. Cugno G., ve dig., 2019, A&A, 622, A156
28. Currie T., ve dig., 2020, ApJ, 904, L25
29. Currie T., ve dig., 2022, Nature Astronomy, 6, 751
30. Currie T., ve dig., 2023a, Science, 380, 198
31. Currie T., Biller B., Lagrange A., Marois C., Guyon O., Nielsen E. L., Bonnefoy M., De Rosa R. J., 2023b, in Inutsuka S., Aikawa Y., Muto T., Tomida K., Tamura M., eds, Astronomical Society of the Pacific Conference Series Vol. 534, Protostars and Planets VII. p. 799 (arXiv:2205.05696), doi:10.48550/arXiv.2205.05696
32. Dalcanton J., ve dig., 2015, preprint, (arXiv:1507.04779)
33. Davies R., Kasper M., 2012, ARA&A, 50, 305
34. De Rosa R. J., Nielsen E. L., Wahhaj Z., Ruffio J.-B., Kalas P. G., Peck A. E., Hirsch L. A., Roberson W., 2023, A&A, 672, A94
35. Dotter A., 2016, ApJS, 222, 8
36. Dupuy T. J., Liu M. C., Ireland M. J., 2009, ApJ, 699, 168
37. Esposito S., ve dig., 2013, A&A, 549, A52
38. Farinato J., ve dig., 2018, preprint, (arXiv:1808.00364)
39. Fontanive C., ve dig., 2020, ApJ, 905, L14
40. Foreman-Mackey D., Hogg D. W., Lang D., Goodman J., 2013, PASP, 125, 306
41. Gaidos E., ve dig., 2022, MNRAS, 512, 583
42. Geißler K., Metchev S. A., Pham A., Larkin J. E., McElwain M., Hillenbrand L. A., 2012, ApJ, 746, 44
43. Goldman B., Marsat S., Henning T., Clemens C., Greiner J., 2010, MNRAS, 405, 1140
44. Goldreich P., Ward W. R., 1973, ApJ, 183, 1051
45. Guyon O., 2018, ARA&A, 56, 315
46. Hauschildt P. H., Baron E., 1999, Journal of Computational and Applied Mathematics, 109, 41
47. Hayashi C., Nakazawa K., Nakagawa Y., 1985, in Black D. C., Matthews M. S., eds, Protostars and Planets II. pp 1100–1153
48. Hinkley S., ve dig., 2011, PASP, 123, 74
49. Husser T. O., Wende-von Berg S., Dreizler S., Homeier D., Reiners A., Barman T., Hauschildt P. H., 2013, A&A, 553, A6
50. Jensen-Clem R., ve dig., 2016, ApJ, 820, 111
51. Johnson-Groh M., ve dig., 2017, AJ, 153, 190
52. Jovanovic N., ve dig., 2015, PASP, 127, 890
53. Keppler M., ve dig., 2018, A&A, 617, A44
54. Keskin O., Jolissaint L., Bouxin A., Yesilyaprak C., 2020, in Schreiber L., Schmidt D., Vernet E., eds, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series Vol. 11448, Adaptive Optics Systems VII. p. 114481P, doi:10.1117/12.2560528
55. Keskin O., Jolissaint L., Bouxin A., Yesilyaprak C., 2022, in Schreiber L., Schmidt D., Vernet E., eds, Society of Photo- Optical Instrumentation Engineers (SPIE) Conference Series Vol. 12185, Adaptive Optics Systems VIII. p. 121851W, doi:10.1117/12.2630893
56. Konopacky Q. M., ve dig., 2016, ApJ, 829, L4
57. Kostov V. B., ve dig., 2016, ApJ, 827, 86
58. Kraus A. L., Ireland M. J., Cieza L. A., Hinkley S., Dupuy T. J., Bowler B. P., Liu M. C., 2014, ApJ, 781, 20
59. Kühn J., ve dig., 2018, in Evans C. J., Simard L., Takami H., eds, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series Vol. 10702, Ground-based and Airborne Instrumentation for Astronomy VII. p. 1070242 (arXiv:1808.00585), doi:10.1117/12.2313448
60. Kühn J. G., Jolissaint L., Bouxin A., Patapis P., 2021, preprint, (arXiv:2102.03201)
61. Kühn J. G., ve dig., 2024, in Bryant J. J., Motohara K., Vernet J. R. D., eds, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series Vol. 13096, Ground-based and Airborne Instrumentation for Astronomy X. p. 130961M, doi:10.1117/12.3018830
62. Kuiper G. P., 1951, Proceedings of the National Academy of Science, 37, 383
63. Kurucz R., 1993, Robert Kurucz CD-ROM, 13, ADS
64. Lagrange A. M., ve dig., 2010, Science, 329, 57
65. Lin L., Potier A., Tandon R., Jolissaint L., Baur A., Õztürk Çetni D., Kühn J., 2024, in European Planetary Science Congress. pp EPSC2024–940, doi:10.5194/epsc2024-940
66. Liu M. C., ve dig., 2011, ApJ, 740, 108
67. Liu M. C., Dupuy T. J., Bowler B. P., Leggett S. K., Best W. M. J., 2012, ApJ, 758, 57
68. Luhman K. L., ve dig., 2006, ApJ, 649, 894
69. Luhman K. L., Mamajek E. E., Allen P. R., Muench A. A., Finkbeiner D. P., 2009, ApJ, 691, 1265
70. Macintosh B., ve dig., 2015, Science, 350, 64
71. Mai X., Mutel R. L., 2022, MNRAS, 513, 2478
72. Maire A. L., ve dig., 2021, The Messenger, 183, 7
73. Mamajek E. E., ve dig., 2015, preprint, (arXiv:1510.07674)
74. Marley M. S., Fortney J. J., Hubickyj O., Bodenheimer P., Lissauer J. J., 2007, ApJ, 655, 541
75. Marois C., Lafrenière D., Doyon R., Macintosh B., Nadeau D., 2006, ApJ, 641, 556
76. Marois C., Lafrenière D., Macintosh B., Doyon R., 2008, ApJ, 673, 647
77. Matthews E. C., ve dig., 2024, Nature, 633, 789
78. Meshkat T., ve dig., 2013, ApJ, 775, L40
79. Miller N., Fortney J. J., 2011, ApJ, 736, L29
80. Monnier J. D., ve dig., 2012, ApJ, 761, L3
81. Müller S., Helled R., 2021, MNRAS, 507, 2094
82. Müller S., Helled R., 2023, Frontiers in Astronomy and Space Sciences, 10, 1179000
83. Müller S., Baron J., Helled R., Bouchy F., Parc L., 2024, A&A, 686, A296
84. N’Diaye M., ve dig., 2016, A&A, 592, A79
85. Nielsen E. L., ve dig., 2012, ApJ, 750, 53
86. Nikouravan B., 2021, International Journal of Fundamental Physical Sciences, 11, 17
87. Oppenheimer B. R., ve dig., 2008, ApJ, 679, 1574
88. Otegi J. F., Bouchy F., Helled R., 2020, A&A, 634, A43
89. Paxton B., Bildsten L., Dotter A., Herwig F., Lesaffre P., Timmes F., 2011, ApJS, 192, 3
90. Pollack J. B., Hubickyj O., Bodenheimer P., Lissauer J. J., Podolak M., Greenzweig Y., 1996, Icarus, 124, 62
91. Radigan J., Jayawardhana R., Lafrenière D., Dupuy T. J., Liu M. C., Scholz A., 2013, ApJ, 778, 36
92. Ramirez S., Akeson R. L., Ciardi D., Kane S. R., Plavchan P., von Braun K., NASA Exoplanet Archive Team 2013, in American Astronomical Society Meeting Abstracts #221. p. 334.01
93. Rein H., 2012, preprint, (arXiv:1211.7121)
94. Reiners A., Seifahrt A., Dreizler S., 2010, A&A, 513, L9
95. Safronov V. S., 1969, Evoliutsiia doplanetnogo oblaka.. Academy of Sciences of the USSR
96. Schneider J., Dedieu C., Le Sidaner P., Savalle R., Zolotukhin I., 2011, A&A, 532, A79
97. Tandon R., Lin L., Potier A., Jolissaint L., Baur A., Öztürk Çetni D., Kühn J. G., 2024, in Bryant J. J., Motohara K., Vernet J. R. D., eds, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series Vol. 13096, Ground-based and Airborne Instrumentation for Astronomy X. p. 130963F, doi:10.1117/12.3018836
98. Tezcan C. T., Satır O., 2025, Turkish Journal of Astronomy and Astrophysics, 6, 111–113
99. Tezcan F., Bastürk Ö., Yesilyaprak C., Alis S., 2025, Contributions of the Astronomical Observatory Skalnate Pleso, 55, 512
100. Thorngren D. P., Fortney J. J., 2018, AJ, 155, 214
101. Todorov K., Luhman K. L., McLeod K. K., 2010, ApJ, 714, L84
102. Ubeira Gabellini M. G., van den Ancker M., Fedele D., Lodato G., Manara C. F., 2019, Research Notes of the American Astronomical Society, 3, 61
103. Vines J. I., Jenkins J. S., 2022, MNRAS, 513, 2719
104. Wagner K., Apai D., Kasper M., McClure M., Robberto M., Currie T., 2020, ApJ, 902, L6
105. Ward-Duong K., ve dig., 2021, AJ, 161, 5
106. Ygouf M., Mugnier L. M., Mouillet D., Fusco T., Beuzit J. L., 2013, A&A, 551, A138