2006A&A...451..351D

Query : 2006A&A...451..351D

2006A&A...451..351D - Astronomy and Astrophysics, volume 451, 351-355 (2006/5-3)

The origins of the substellar companion to GQ Lupi.

DEBES J.H. and SIGURDSSON S.

Abstract (from CDS):

The recently discovered substellar companion to GQ Lup possibly represents a direct test of current planet formation theories. We examine the possible formation scenarios for the companion to GQ Lup assuming it is a ∼2MJup object. We determine that GQ Lup B most likely was scattered into a large, eccentric orbit by an interaction with another planet in the inner system. If this is the case, several directly observable predictions can be made, including the presence of a more massive, secondary companion that could be detected through astrometry, radial velocity measurements, or sculpting in GQ Lup's circumstellar disk. This scenario requires a highly eccentric orbit for the companion already detected. These predictions can be tested within the next decade or so. Additionally, we look at scenarios of formation if the companion is a brown dwarf. One possible formation scenario may involve an interaction between a brown dwarf binary and GQ Lup. We look for evidence of any brown dwarfs that have been ejected from the GQ Lup system by searching the 2MASS all-sky survey.

Abstract Copyright: ∼

Journal keyword(s): stars: individual: GQ Lup - planets and satellites: formation - stars: low-mass, brown dwarfs

CDS comments: Paragraph 5. Star Formalhut is Fomalhaut in Simbad.

Simbad objects: 61

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Number of rows : 61
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 1932 1
2 HD 109573 PM* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774 7.25 5.81 A0V 634 1
3 2MASS J15471635-3528501 NIR 15 47 16.35 -35 28 50.1           ~ 1 0
4 2MASS J15471668-3529030 NIR 15 47 16.6928709600 -35 29 03.270770772           ~ 1 0
5 2MASS J15472617-3528273 NIR 15 47 26.17 -35 28 27.3           ~ 1 0
6 2MASS J15472780-3551451 NIR 15 47 27.8457928584 -35 51 45.131391108           ~ 1 0
7 2MASS J15473747-3532415 * 15 47 37.4780793816 -35 32 41.638218504           ~ 1 0
8 2MASS J15474427-3523296 PM* 15 47 44.2740470760 -35 23 29.777782776           ~ 1 0
9 2MASS J15474501-3526593 * 15 47 45.0278389728 -35 26 59.400108492           ~ 1 0
10 2MASS J15475311-3542510 * 15 47 53.1288234792 -35 42 51.042932316           ~ 1 0
11 2MASS J15475509-3523382 * 15 47 55.1114597208 -35 23 38.302521720           ~ 1 0
12 2MASS J15475563-3521241 * 15 47 55.6405227552 -35 21 24.223037688           ~ 1 0
13 2MASS J15475883-3526076 * 15 47 58.8337400400 -35 26 07.031081652           ~ 1 0
14 2MASS J15481291-3516079 NIR 15 48 12.9215598816 -35 16 08.020725060           ~ 1 0
15 2MASS J15482295-3538467 NIR 15 48 22.9586839464 -35 38 46.784619312           ~ 1 0
16 2MASS J15483522-3527334 * 15 48 35.2331046528 -35 27 33.587518428           ~ 1 0
17 2MASS J15483679-3529316 * 15 48 36.7984180320 -35 29 31.710208560           ~ 1 0
18 2MASS J15483801-3534557 NIR 15 48 38.02 -35 34 55.7           ~ 1 0
19 2MASS J15484005-3539242 * 15 48 40.0664412432 -35 39 24.282832644           ~ 1 0
20 2MASS J15484338-3541324 * 15 48 43.3934025072 -35 41 32.345647116           ~ 1 0
21 2MASS J15484536-3545145 * 15 48 45.3775200840 -35 45 14.390036820           ~ 1 0
22 2MASS J15485985-3525412 * 15 48 59.8662246480 -35 25 41.191724316           ~ 1 0
23 2MASS J15491125-3552235 NIR 15 49 11.25 -35 52 23.6           ~ 1 0
24 V* GQ Lup B LM* 15 49 12.05 -35 39 05.1           M9e 132 1
25 V* GQ Lup Or* 15 49 12.1053805848 -35 39 05.058139788 12.19 12.76 11.66 11.15   K7Ve 290 1
26 2MASS J15491528-3525074 NIR 15 49 15.2800999656 -35 25 07.446848052           ~ 1 0
27 2MASS J15491713-3539342 NIR 15 49 17.13480 -35 39 34.2828           ~ 1 0
28 2MASS J15491883-3537209 * 15 49 18.8315180472 -35 37 21.146135556           ~ 1 0
29 2MASS J15492467-3535124 * 15 49 24.6847092576 -35 35 12.662617452           ~ 1 0
30 2MASS J15492752-3539152 NIR 15 49 27.52 -35 39 15.2           ~ 1 0
31 2MASS J15492910-3512015 * 15 49 29.0984880840 -35 12 01.546314660           ~ 1 0
32 2MASS J15492917-3525326 NIR 15 49 29.1608628984 -35 25 32.654711568           ~ 1 0
33 2MASS J15493001-3536525 * 15 49 30.0039654504 -35 36 52.687247724           ~ 1 0
34 2MASS J15493047-3537105 NIR 15 49 30.48 -35 37 10.5           ~ 1 0
35 2MASS J15493127-3529239 * 15 49 31.2687949872 -35 29 24.208883736           ~ 1 0
36 2MASS J15493134-3527552 * 15 49 31.3494129504 -35 27 55.376765784           ~ 1 0
37 2MASS J15493187-3525237 NIR 15 49 31.8695964000 -35 25 23.794774464           ~ 1 0
38 2MASS J15493223-3535248 NIR 15 49 32.2122607632 -35 35 24.946402956           ~ 1 0
39 2MASS J15493305-3528567 NIR 15 49 33.0574304208 -35 28 56.910059616           ~ 1 0
40 2MASS J15493572-3534144 * 15 49 35.7160926336 -35 34 14.598952248           ~ 1 0
41 2MASS J15493925-3526328 * 15 49 39.2484637224 -35 26 32.988990804           ~ 1 0
42 2MASS J15494021-3527275 PM* 15 49 40.2138143976 -35 27 27.742328064           ~ 1 0
43 2MASS J15494240-3536488 * 15 49 42.4079818440 -35 36 48.949384140           ~ 1 0
44 2MASS J15494349-3606534 NIR 15 49 43.50 -36 06 53.4           ~ 1 0
45 2MASS J15494801-3536572 * 15 49 48.0171522000 -35 36 57.203538840           ~ 1 0
46 2MASS J15494912-3533485 * 15 49 49.1429938728 -35 33 48.561708600           ~ 1 0
47 2MASS J15495088-3534260 NIR 15 49 50.89 -35 34 26.0           ~ 1 0
48 2MASS J15495173-3538208 NIR 15 49 51.73 -35 38 20.9           ~ 1 0
49 2MASS J15495219-3538573 * 15 49 52.2030543192 -35 38 57.159746844           ~ 1 0
50 2MASS J15495262-3535264 * 15 49 52.6403448840 -35 35 26.610502272           ~ 1 0
51 2MASS J15495441-3537003 NIR 15 49 54.42 -35 37 00.4           ~ 1 0
52 2MASS J15500221-3531572 * 15 50 02.2150348920 -35 31 57.243200808           ~ 1 0
53 2MASS J15500473-3523359 * 15 50 04.7422997952 -35 23 35.879091036           ~ 1 0
54 2MASS J15501035-3532237 * 15 50 10.3384639944 -35 32 23.832602772           ~ 1 0
55 2MASS J15505733-3529531 * 15 50 57.3298845048 -35 29 52.956042252           ~ 1 0
56 2MASS J15512721-3531495 NIR 15 51 27.2410638360 -35 31 49.503156096           ~ 1 0
57 2MASS J15513825-3546314 NIR 15 51 38.26 -35 46 31.5           ~ 1 0
58 2MASS J15514210-3534203 * 15 51 42.0926392368 -35 34 20.298736452           ~ 1 0
59 2MASS J15514321-3546411 NIR 15 51 43.21 -35 46 41.1           ~ 1 0
60 2MASS J15514417-3539169 * 15 51 44.1807985872 -35 39 16.744938948           ~ 1 0
61 * alf PsA PM* 22 57 39.04625 -29 37 20.0533 1.31 1.25 1.16 1.11 1.09 A4V 1236 3

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