OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event

被引：3

作者：

Satoh, Yuki ^{[1
,2
]}

Koshimoto, Naoki ^{[1
]}

Bennett, David A. ^{[3
,4
]}

Sumi, Takahiro ^{[1
]}

Rattenbury, Nicholas ^{[5
]}

Suzuki, Daisuke ^{[1
]}

Miyazaki, Shota ^{[6
]}

Bond, Ian ^{[7
]}

Udalski, Andrzej ^{[8
]}

Gould, Andrew ^{[9
,10
]}

Bozza, Valerio ^{[11
,12
]}

Dominik, Martin ^{[13
]}

Hirao, Yuki ^{[46
]}

Kondo, Iona ^{[1
]}

Kirikawa, Rintaro ^{[1
]}

Hamada, Ryusei ^{[1
]}

Abe, Fumio ^{[14
]}

Barry, Richard ^{[3
]}

Bhattacharya, Aparna ^{[3
,4
]}

Fujii, Hirosane ^{[1
]}

Fukui, Akihiko ^{[15
,16
]}

Fujita, Katsuki ^{[1
]}

Ikeno, Tomoya ^{[1
]}

Ishitani Silva, Stela ^{[3
,17
]}

Itow, Yoshitaka ^{[14
]}

Matsubara, Yutaka ^{[14
]}

Matsumoto, Sho ^{[1
]}

Muraki, Yasushi ^{[14
]}

Niwa, Kosuke ^{[1
]}

Okamura, Arisa J. ^{[1
]}

Olmschenk, Greg ^{[3
]}

Ranc, Clement ^{[18
]}

Toda, Taiga ^{[1
]}

Tomoyoshi, Mio ^{[1
]}

Tristram, Paul ^{[19
]}

Vandorou, Aikaterini ^{[3
,4
]}

Yama, Hibiki ^{[1
]}

Yamashita, Kansuke ^{[1
]}

Mroz, Przemek ^{[8
]}

Poleski, Radoslaw ^{[8
]}

Skowron, Jan ^{[8
]}

Szymanski, Michal K. ^{[8
]}

Poleski, Radek A. ^{[8
]}

Soszynski, Igor ^{[8
]}

Pietrukowicz, Pawel ^{[8
]}

Kozlowski, Szymon ^{[8
]}

Ulaczyk, Krzysztof D. ^{[20
]}

Rybicki, Krzysztof ^{[8
,21
]}

Iwanek, Patryk ^{[8
]}

Wrona, Marcin ^{[8
]}

机构：

[1] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, 1-1 Machikaneyama-cho, Toyonaka, Osaka 5600043, Japan

[2] Kanto Gakuin Univ, Coll Sci & Engn, 1-50-1 Mutsuurahigashi, Kanazawa-ku, Yokohama, Kanagawa 2368501, Japan

[3] NASA Goddard Space Flight Ctr, Code 667, Greenbelt, MD 20771 USA

[4] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[5] Univ Auckland, Dept Phys, Private Bag 92019, Auckland, New Zealand

[6] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa 2525210, Japan

[7] Massey Univ, Inst Nat & Math Sci, Auckland 0745, New Zealand

[8] Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland

[9] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[10] Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA

[11] Univ Salerno, Dipartimento Fis E R Canianiello, Via Giovanni Paolo 2132, I-84084 Fisciano, Italy

[12] Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy

[13] Univ St Andrews, Ctr Exoplanet Sci, SUPA Sch Phys & Astron, North Haugh, St Andrews KY16, Scotland

[14] Nagoya Univ, Inst Space Earth Environm Res, Nagoya 4648601, Japan

[15] Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, 7-3-1 Hongo, Bunkyo-ku, Tokyo 1130033, Japan

[16] Inst Astrofis Canarias, Via Lactea s-n, E-38205 San Cristobal la Laguna, Tenerife, Spain

[17] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA

[18] Sorbonne Univ, Inst Astrophys Paris, CNRS, UMR 7095, 98 bis bd Arago, F-75014 Paris, France

[19] Univ Canterbury Mt John Observ, POB 56, Lake Tekapo 8770, New Zealand

[20] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, England

[21] Weizmann Inst Sci, Dept Particle Phys & Astrophys, IL-76100 Rehovot, Israel

[22] Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch 8020, New Zealand

[23] Korea Astron & Space Sci Inst, Daejon 34055, South Korea

[24] Chungbuk Natl Univ, Dept Phys, Cheongju 28644, South Korea

[25] Univ Sci & Technol UST, 217 Gajeong-ro, Daejeon 34113, South Korea

[26] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA

[27] Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China

[28] Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China

[29] Kyung Hee Univ, Sch Space Res, Yongin 17104, South Korea

[30] Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA

[31] Univ Copenhagen, Niels Bohr Inst, Ctr ExoLife Sci, Oster Voldgade 5, DK-1350 Copenhagen, Denmark

[32] Univ Antofagasta, Ctr Astron, Ave Angamos 601, Antofagasta 1270300, Chile

[33] Isfahan Univ Technol, Dept Phys, Esfahan 8415683111, Iran

[34] Open Univ, Ctr Elect Imaging, Dept Phys Sci, Milton Keynes MK7 6AA, England

[35] Univ Edinburgh, Inst Astron, Royal Observ, Edinburgh EH9 3HJ, Scotland

[36] Univ Atacama, Inst Invest Astron & Ciencias Planetarias, Copayapu 485, Copiapo, Atacama, Chile

[37] Univ Copenhagen, Niels Bohr Inst, Ctr Star & Planet Format, Ostervoldgade 5, DK-1350 Copenhagen, Denmark

[38] Univ Hamburg, Meteorol Inst, Fac Math Informat & Nat Sci, Dept Earth Sci, Bundesstr 55, D-20146 Hamburg, Germany

[39] Pontificia Univ Catolica Chile, Inst Astrofis, Ave Vicuna Mackenna 4860, Macul, Santiago, Chile

[40] Univ Atacama, Inst Astron & Ciencias Planetarias, Copayapu 485, Copiapo, Chile

[41] Zentrum Astron Univ Heidelberg, Astron Rechen Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany

[42] Seoul Natl Univ, Res Inst Basic Sci, Astron Res Ctr, 1 Gwanak-ro, Seoul 08826, South Korea

[43] Univ Coimbra, Dept Fis, Inst Astrofis & Ciencias Espaco, PT3040004, Coimbra, Portugal

[44] Sharif Univ Technol, Dept Phys, POB 111559161, Tehran, Iran

[45] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England

[46] Univ Tokyo, Inst Astron, Grad Sch Sci, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan

来源：

ASTRONOMICAL JOURNAL | 2023年 / 166卷 / 03期

关键词：

OGLE-III CATALOG; LOW-MASS STARS; DIFFERENCE IMAGE-ANALYSIS; GALACTIC HABITABLE ZONE; BROWN DWARF DESERT; SOLAR-TYPE STARS; RR LYRAE STARS; AGE DISTRIBUTION; OPTICAL DEPTH; STELLAR MULTIPLICITY;

D O I：

10.3847/1538-3881/ace908

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an analysis of microlensing event OGLE-2019-BLG-0825. This event was identified as a planetary candidate by preliminary modeling. We find that significant residuals from the best-fit static binary-lens model exist and a xallarap effect can fit the residuals very well and significantly improves chi (2) values. On the other hand, by including the xallarap effect in our models, we find that binary-lens parameters such as mass ratio, q, and separation, s, cannot be constrained well. However, we also find that the parameters for the source system such as the orbital period and semimajor axis are consistent between all the models we analyzed. We therefore constrain the properties of the source system better than the properties of the lens system. The source system comprises a G-type main-sequence star orbited by a brown dwarf with a period of P similar to 5 days. This analysis is the first to demonstrate that the xallarap effect does affect binary-lens parameters in planetary events. It would not be common for the presence or absence of the xallarap effect to affect lens parameters in events with long orbital periods of the source system or events with transits to caustics, but in other cases, such as this event, the xallarap effect can affect binary-lens parameters.

引用

页数：15