KELT-25 b and KELT-26 b: A Hot Jupiter and a Substellar Companion Transiting Young A Stars Observed by TESS

被引：30

作者：

Martinez, Romy Rodriguez ^{[1
]}

Gaudi, B. Scott ^{[1
]}

Rodriguez, Joseph E. ^{[2
]}

Zhou, George ^{[2
]}

Labadie-Bartz, Jonathan ^{[3
]}

Quinn, Samuel N. ^{[2
]}

Penev, Kaloyan ^{[4
]}

Tan, Thiam-Guan ^{[5
]}

Latham, David W. ^{[2
]}

Paredes, Leonardo A. ^{[6
]}

Kielkopf, John F. ^{[7
]}

Addison, Brett ^{[8
]}

Wright, Duncan J. ^{[8
]}

Teske, Johanna ^{[9
]}

Howell, Steve B. ^{[10
]}

Ciardi, David ^{[11
]}

Ziegler, Carl ^{[12
]}

Stassun, Keivan G. ^{[13
,14
]}

Johnson, Marshall C. ^{[15
]}

Eastman, Jason D. ^{[2
]}

Siverd, Robert J. ^{[16
]}

Beatty, Thomas G. ^{[17
,18
]}

Bouma, Luke ^{[19
]}

Bedding, Timothy ^{[20
]}

Pepper, Joshua ^{[21
]}

Winn, Joshua ^{[19
]}

Lund, Michael B. ^{[11
]}

Villanueva, Steven, Jr. ^{[22
,23
]}

Stevens, Daniel J. ^{[24
,25
]}

Jensen, Eric L. N. ^{[26
]}

Kilby, Coleman ^{[26
]}

Crane, Jeffrey D. ^{[9
,27
]}

Tokovinin, Andrei ^{[28
]}

Everett, Mark E. ^{[29
]}

Tinney, C. G. ^{[30
]}

Fausnaugh, Michael ^{[22
,23
]}

Cohen, David H. ^{[26
]}

Bayliss, Daniel ^{[31
,32
]}

Bieryla, Allyson ^{[2
]}

Cargile, Phillip A. ^{[2
]}

Collins, Karen A. ^{[2
]}

Conti, Dennis M. ^{[33
]}

Colon, Knicole D. ^{[34
]}

Curtis, Ivan A. ^{[35
]}

Depoy, D. L. ^{[36
,37
]}

Evans, Phil ^{[38
]}

Feliz, Dax L. ^{[13
]}

Gregorio, Joao ^{[39
,40
]}

Rothenberg, Jason ^{[41
]}

James, David J. ^{[2
,42
]}

机构：

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

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

[3] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226,Cidade Univ, BR-05508900 Sao Paulo, SP, Brazil

[4] Univ Texas Dallas, Dept Phys, 800 West Campbell Rd, Richardson, TX 75080 USA

[5] Perth Exoplanet Survey Telescope, Perth, WA, Australia

[6] Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30302 USA

[7] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 USA

[8] Univ Southern Queensland, Ctr Astrophys, West St, Toowoomba, Qld 4350, Australia

[9] Carnegie Inst Sci, The Observatories, 813 Santa Barbara St, Pasadena, CA 91101 USA

[10] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[11] CALTECH IPAC NASA Exoplanet Sci Inst, 1200 East Calif Ave, Pasadena, CA 91125 USA

[12] Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada

[13] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[14] Fisk Univ, Dept Phys, 1000 17th Ave North, Nashville, TN 37208 USA

[15] Cumbres Observ, 6740 Cortona Dr,Suite 102, Goleta, CA 93117 USA

[16] Northern Operat Ctr, Gemini Observ, 670 North Aohoku Pl, Hilo, HI 96720 USA

[17] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA

[18] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[19] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[20] Univ Sydney, Sch Phys, Sydney Inst Astron SIfA, Sydney, NSW 2006, Australia

[21] Lehigh Univ, Dept Phys, 16 Mem Dr East, Bethlehem, PA 18015 USA

[22] MIT, Dept Phys, Cambridge, MA 02139 USA

[23] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[24] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA

[25] Penn State Univ, Ctr Exoplanets & Habitable Worlds, 525 Davey Lab, University Pk, PA 16802 USA

[26] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA

[27] Carnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 USA

[28] Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile

[29] Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA

[30] UNSW Sydney, Sch Phys, Exoplanetary Sci UNSW, Sydney, NSW 2052, Australia

[31] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[32] Univ Warwick, Ctr Exoplanets & Habitabil, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[33] Amer Assoc Variable Star Observers, 49 Bay State Rd, Cambridge, MA 02138 USA

[34] NASA, Exoplanets & Stellar Astrophys Lab, Goddard Space Flight Ctr, Code 667, Greenbelt, MD 20771 USA

[35] Ivan Curtis Private Observ, Adelaide, SA, Australia

[36] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA

[37] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[38] El Sauce Observ, Rio Hurtado, Coquimbo, Chile

[39] Atalaia Grp, Portalegre, Portugal

[40] CROW Observ, Portalegre, Portugal

[41] Univ Wyoming, Dept Phys & Astron, 1000 East Univ Ave,Dept 3905, Laramie, WY 82071 USA

[42] Harvard Univ, Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 USA

[43] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 USA

[44] South African Astron Observ, POB 9, ZA-7935 Cape Town, South Africa

[45] Southern African Large Telescope, POB 9, ZA-7935 Cape Town, South Africa

[46] Spot Observ, Nashville, TN 37206 USA

[47] Wellesley Coll, Dept Astron, Wellesley, MA 02481 USA

[48] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[49] Kutztown State Univ, Dept Phys Sci, Kutztown, PA 19530 USA

[50] Hazelwood Observ, Churchill, Vic, Australia

来源：

ASTRONOMICAL JOURNAL | 2020年 / 160卷 / 03期

基金：

澳大利亚研究理事会; 美国国家航空航天局; 巴西圣保罗研究基金会;

关键词：

ROTATIONAL VELOCITIES; PLANET; DWARF; EXOPLANETS; SOUTH; SUN; ATMOSPHERES; ABUNDANCE; SELECTION; PROJECT;

D O I：

10.3847/1538-3881/ab9f2d

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discoveries of KELT-25 b (TIC 65412605, TOI-626.01) and KELT-26 b (TIC 160708862, TOI1337.01), two transiting companions orbiting relatively bright, early A stars. The transit signals were initially detected by the KELT survey and subsequently confirmed by Transiting Exoplanet Survey Satellite (TESS) photometry. KELT-25 b is on a 4.40 day orbit around the V = 9.66 star CD-24 5016 (T-eff = 8280(-180)(+440) K, M-star = 2.18(-0.11)(+0.12) M-circle dot), while KELT-26 b is on a 3.34 day orbit around the V = 9.95 star HD 134004 (T-eff = 8640(-240)(+500) K, M-circle dot = 1.93(-0.16)(+0.14) M-circle dot), which is likely an Am star. We have confirmed the substellar nature of both companions through detailed characterization of each system using ground-based and TESS photometry, radial velocity measurements, Doppler tomography, and high-resolution imaging. For KELT-25, we determine a companion radius of R-P = 1.64(-0.043)(+0.039) R-J and a 3 sigma upper limit on the companion's mass of similar to 64 M-J. For KELT-26 b, we infer a planetary mass and radius of M-P = 1.41(-0.51)(+0.43) M-J and R-P = 1.94(-0.058)(+0.060) R-J. From Doppler tomographic observations, we find KELT-26 b to reside in a highly misaligned orbit. This conclusion is weakly corroborated by a subtle asymmetry in the transit light curve from the TESS data. KELT-25 b appears to be in a well-aligned, prograde orbit, and the system is likely a member of the cluster Theia 449.

引用

页数：21

共 45 条

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Martínez, Romy Rodríguez
Gaudi, B. Scott
Rodriguez, Joseph E.
Zhou, George
Labadie-Bartz, Jonathan
Quinn, Samuel N.
Penev, Kaloyan
Tan, Thiam-Guan
Latham, David W.
Paredes, Leonardo A.
Kielkopf, John F.
Addison, Brett
Wright, Duncan J.
Teske, Johanna
Howell, Steve B.
Ciardi, David
Ziegler, Carl
Stassun, Keivan G.
Johnson, Marshall C.
Eastman, Jason D.
Siverd, Robert J.
Beatty, Thomas G.
Bouma, Luke
Bedding, Timothy
Pepper, Joshua
Winn, Joshua
Lund, Michael B.
Villanueva, Steven
Stevens, Daniel J.
Jensen, Eric L.N.
Kilby, Coleman
Crane, Jeffrey D.
Tokovinin, Andrei
Everett, Mark E.
Tinney, C.G.
Fausnaugh, Michael
Cohen, David H.
Bayliss, Daniel
Bieryla, Allyson
Cargile, Phillip A.
Collins, Karen A.
Conti, Dennis M.
Colón, Knicole D.
Curtis, Ivan A.
Depoy, D.L.
Evans, Phil
Feliz, Dax L.
Gregorio, Joao
Rothenberg, Jason
James, David J.
arXiv, 2019,
[2] Rapidly rotating stars and their transiting planets: KELT-17b, KELT-19Ab, and KELT-21b in the CHEOPS and TESS era
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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2022, 513 (02) : 2822 - 2840
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ASTROPHYSICAL JOURNAL, 2013, 773 (01):
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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 459 (04) : 4281 - 4298
[6] KELT-12b: A P ∼ 5 day, Highly Inflated Hot Jupiter Transiting a Mildly Evolved Hot Star
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ASTRONOMICAL JOURNAL, 2017, 153 (04):
[7] KELT-7b: A HOT JUPITER TRANSITING A BRIGHT V=8.54 RAPIDLY ROTATING F-STAR
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ASTRONOMICAL JOURNAL, 2015, 150 (01):
[8] KELT-17B: A HOT-JUPITER TRANSITING AN A-STAR IN A MISALIGNED ORBIT DETECTED WITH DOPPLER TOMOGRAPHY
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ASTRONOMICAL JOURNAL, 2016, 152 (05):
[9] Kinetic Simulation of Ultra-Hot Jupiter KELT-9b
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SOLAR SYSTEM RESEARCH, 2025, 59 (03)
[10] KELT-23Ab: A Hot Jupiter Transiting a Near-solar Twin Close to the TESS and JWST Continuous Viewing Zones
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ASTRONOMICAL JOURNAL, 2019, 158 (02):

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