PLANETS AROUND THE K-GIANTS BD+20 274 AND HD 219415

被引：12

作者：

Gettel, S. ^{[1
,2
]}

Wolszczan, A. ^{[1
,2
]}

Niedzielski, A. ^{[3
]}

Nowak, G. ^{[3
]}

Adamow, M. ^{[3
]}

Zielinski, P. ^{[3
]}

Maciejewski, G. ^{[3
]}

机构：

[1] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[2] Penn State Univ, Ctr Exoplanets & Habitable Worlds, University Pk, PA 16802 USA

[3] Nicholas Copernicus Univ, Torun Ctr Astron, PL-87100 Torun, Poland

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 756卷 / 01期

关键词：

planetary systems; stars:; individual; (BD+20; 274; HD; 219415); INTERMEDIATE-MASS STARS; COMPANIONS; SEARCH; OSCILLATIONS; ENGULFMENT; AMPLITUDES; PARAMETERS; VELOCITIES; DWARFS; ORBIT;

D O I：

10.1088/0004-637X/756/1/53

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discovery of planet-mass companions to two giant stars by the ongoing Penn State-Torun Planet Search conducted with the 9.2 m Hobby-Eberly Telescope. The less massive of these stars, K5-giant BD+20 274, has a 4.2 M-J minimum mass planet orbiting the star at a 578 day period and a more distant, likely stellar-mass companion. The best currently available model of the planet orbiting the K0-giant HD 219415 points to a greater than or similar to Jupiter-mass companion in a 5.7 year, eccentric orbit around the star, making it the longest period planet yet detected by our survey. This planet has an amplitude of similar to 18 m s(-1), comparable to the median radial velocity "jitter," typical of giant stars.

引用

页数：7

共 11 条

[1] SUBSTELLAR-MASS COMPANIONS TO THE K-DWARF BD+14 4559 AND THE K-GIANTS HD 240210 AND BD+20 2457
Niedzielski, A.
Nowak, G.
Adamow, M.
Wolszczan, A.
ASTROPHYSICAL JOURNAL, 2009, 707 (01) : 768 - 777
[2] SUBSTELLAR-MASS COMPANIONS TO THE K-GIANTS HD 240237, BD+48 738, AND HD 96127
Gettel, S.
Wolszczan, A.
Niedzielski, A.
Nowak, G.
Adamow, M.
Zielinski, P.
Maciejewski, G.
ASTROPHYSICAL JOURNAL, 2012, 745 (01)
[3] BD+15 2940 AND HD 233604: TWO GIANTS WITH PLANETS CLOSE TO THE ENGULFMENT ZONE
Nowak, G.
Niedzielski, A.
Wolszczan, A.
Adamow, M.
Maciejewski, G.
ASTROPHYSICAL JOURNAL, 2013, 770 (01)
[4] Detection of planet candidates around K giants. HD 40956, HD 111591, and HD 113996
Jeong, G.
Lee, B. -C.
Han, I.
Omiya, M.
Izumiura, H.
Sato, B.
Harakawa, H.
Kambe, E.
Mkrtichian, D.
ASTRONOMY & ASTROPHYSICS, 2018, 610
[5] Evidence against the young hot-Jupiter around BD+20 1790
Figueira, P.
Marmier, M.
Bonfils, X.
di Folco, E.
Udry, S.
Santos, N. C.
Lovis, C.
Megevand, D.
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ASTRONOMY & ASTROPHYSICS, 2010, 513
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Gaidos, Eric
Fischer, Debra A.
Mann, Andrew W.
Howard, Andrew W.
ASTROPHYSICAL JOURNAL, 2013, 771 (01)
[7] Three Nearby K-Giants with Planets: Accurate Determination of Basic Parameters, Including an Analysis of Metallicity Based on Fe I Lines
Lyubimkov, L. S.
Petrov, D. V.
Poklad, D. B.
ASTROPHYSICS, 2019, 62 (03) : 338 - 359
[8] The HARPS search for southern extra-solar planets XV. Six long-period giant planets around BD-17 0063, HD 20868, HD 73267, HD 131664, HD 145377, and HD 153950
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Pepe, F.
Queloz, D.
Santos, N. C.
ASTRONOMY & ASTROPHYSICS, 2009, 496 (02) : 513 - 519
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Hernan-Obispo, M.
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Barnes, J. R.
de Castro, E.
Cornide, M.
ASTRONOMY & ASTROPHYSICS, 2010, 512
[10] A Search for Exoplanets around Northern Circumpolar Stars. IV. Six Planet Candidates to the K Giants, HD 44385, HD 97619, HD 106574, HD 118904, HD 164428, and HD 202432
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Han, Inwoo
Park, Myeong-Gu
Hatzes, Artie P.
Bang, Tae-Yang
Gu, Shenghong
Bai, Jinming
Lee, Byeong-Cheol
ASTRONOMICAL JOURNAL, 2018, 156 (02)

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