2009PASP..121.1218B


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.12CET10:45:18

2009PASP..121.1218B - Publ. Astron. Soc. Pac., 121, 1218-1231 (2009/November-0)

The Carnegie Astrometric Planet Search Program.

BOSS A.P., WEINBERGER A.J., ANGLADA-ESCUDE G., THOMPSON I.B., BURLEY G., BIRK C., PRAVDO S.H., SHAKLAN S.B., GATEWOOD G.D., MAJEWSKI S.R. and PATTERSON R.J.

Abstract (from CDS):

We are undertaking an astrometric search for gas giant planets and brown dwarfs orbiting nearby low-mass dwarf stars with the 2.5 m du Pont Telescope at the Las Campanas Observatory in Chile. We have built two specialized astrometric cameras, the Carnegie Astrometric Planet Search Cameras (CAPSCam-S and CAPSCam-N), using two Teledyne HAWAII-2RG HyViSI arrays, with the cameras' design having been optimized for high-accuracy astrometry of M dwarf stars. We describe two independent CAPSCam data reduction approaches and present a detailed analysis of the observations to date of one of our target stars, NLTT 48256. Observations of NLTT 48256 taken since 2007 July with CAPSCam-S imply that astrometric accuracies of around 0.3 mas are achievable, sufficient to detect a Jupiter-mass companion orbiting 1 AU from a late M dwarf 10 pc away with a signal-to-noise ratio (S/N) of about 4. We plan to follow about 100 nearby (primarily within about 10 pc) low-mass stars, principally late M, L, and T dwarfs, for 10 yr or more, in order to detect very low-mass companions with orbital periods long enough to permit the existence of habitable, Earth-like planets on shorter-period orbits. These stars are generally too faint and red to be included in ground-based Doppler planet surveys, which are often optimized for FGK dwarfs. The smaller masses of late M dwarfs also yield correspondingly larger astrometric signals for a given mass planet. Our search will help to determine whether gas giant planets form primarily by core accretion or by disk instability around late M dwarf stars.

Abstract Copyright:

Journal keyword(s): Astronomical Instrumentation

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 G 78-28 PM* 03 17 12.2163118785 +45 22 22.126715731   13.6   12.030   M3.0Ve 22 1
2 Ross 28 PM* 04 12 58.8326322803 +52 36 42.021350887   15.0   13.203   M4.0Ve 40 1
3 * rho01 Cnc PM* 08 52 35.8113282132 +28 19 50.956901366 7.45 6.82   5.4   K0IV-V 947 1
4 L 143-23 PM* 10 44 21.2334129761 -61 12 35.263329881   15.74 13.920 12.33 10.31 M5.5V 49 0
5 VB 10 Fl* 19 16 57.6103282334 +05 09 01.588675251   19.42 17.30     M8V 426 1
6 LP 813-23 PM* 19 48 37.5232760394 -19 32 14.370007457     18.56     ~ 4 0
7 Wolf 1084 SB* 20 43 19.2534162835 +55 20 53.541561877   16.46   13.9   M5Ve 74 0
8 BD-15 6290 BY* 22 53 16.7323107416 -14 15 49.303409936 12.928 11.749 10.192 9.013 7.462 M3.5V 830 1

    Equat.    Gal    SGal    Ecl

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2019.11.12-10:45:18

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