Millimagnitude optical photometry for the transiting planetary candidate OGLE-TR-109

José Miguel Fernández, Dante Minniti, Grzegorz Pietrzynski, Wolfgang Gieren, María Teresa Ruíz, Manuela Zoccali, Andrzej Udalski, Thomas Szeifert

Resultado de la investigación: Article

7 Citas (Scopus)

Resumen

We present precise V-band photometry for the low-amplitude transit candidate star OGLE-TR-109. This is an extreme case among the transiting candidates found by the OGLE group because of the early spectral type of the star (F0 V), the low transit amplitude (AI = 0.008 mag), and the very short period (P = 0.58909 days) of the orbiting companion. Using difference image photometry, we are able to achieve millimagnitude errors in the individual data points. One transit of this star is well defined in our light curve. This confirms the OGLE detection and rules out the possibility of a false positive. The measurement of this transit allows us to refine the transit amplitude (AV = 0.006 ± 0.001 mag) and the ephemerides for this interesting system, as well as the radius of the possible orbiting companion (RP = 0.90RJ ± 0.09RJ) and the inclination of the orbit (i = 77° ± 5°). Two other transits observed at lower S/N confirm the period of this system measured by OGLE. There is no evidence for a blend of the F-type main-sequence star with a redder eclipsing binary or for secondary transits in the present observations. The absence of ellipsoidal modulation in the light curve of the primary rules out a low-mass star companion or brown dwarf with M > 14MJ ± 8MJ. The remaining possibilities for OGLE-TR-109 are a blend between the F-type star and a binary with a bluer primary star, or a new transiting extrasolar planet.

Idioma originalEnglish
Páginas (desde-hasta)587-593
Número de páginas7
PublicaciónAstrophysical Journal
Volumen647
N.º1 I
DOI
EstadoPublished - 10 ago 2006

Huella dactilar

transit
photometry
stars
light curve
planet
ephemerides
companion stars
main sequence stars
extrasolar planets
extremely high frequencies
inclination
orbits
modulation
radii

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Space and Planetary Science
  • Astronomy and Astrophysics

Citar esto

Fernández, J. M., Minniti, D., Pietrzynski, G., Gieren, W., Ruíz, M. T., Zoccali, M., ... Szeifert, T. (2006). Millimagnitude optical photometry for the transiting planetary candidate OGLE-TR-109. Astrophysical Journal, 647(1 I), 587-593. https://doi.org/10.1086/500921
Fernández, José Miguel ; Minniti, Dante ; Pietrzynski, Grzegorz ; Gieren, Wolfgang ; Ruíz, María Teresa ; Zoccali, Manuela ; Udalski, Andrzej ; Szeifert, Thomas. / Millimagnitude optical photometry for the transiting planetary candidate OGLE-TR-109. En: Astrophysical Journal. 2006 ; Vol. 647, N.º 1 I. pp. 587-593.
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abstract = "We present precise V-band photometry for the low-amplitude transit candidate star OGLE-TR-109. This is an extreme case among the transiting candidates found by the OGLE group because of the early spectral type of the star (F0 V), the low transit amplitude (AI = 0.008 mag), and the very short period (P = 0.58909 days) of the orbiting companion. Using difference image photometry, we are able to achieve millimagnitude errors in the individual data points. One transit of this star is well defined in our light curve. This confirms the OGLE detection and rules out the possibility of a false positive. The measurement of this transit allows us to refine the transit amplitude (AV = 0.006 ± 0.001 mag) and the ephemerides for this interesting system, as well as the radius of the possible orbiting companion (RP = 0.90RJ ± 0.09RJ) and the inclination of the orbit (i = 77° ± 5°). Two other transits observed at lower S/N confirm the period of this system measured by OGLE. There is no evidence for a blend of the F-type main-sequence star with a redder eclipsing binary or for secondary transits in the present observations. The absence of ellipsoidal modulation in the light curve of the primary rules out a low-mass star companion or brown dwarf with M > 14MJ ± 8MJ. The remaining possibilities for OGLE-TR-109 are a blend between the F-type star and a binary with a bluer primary star, or a new transiting extrasolar planet.",
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Fernández, JM, Minniti, D, Pietrzynski, G, Gieren, W, Ruíz, MT, Zoccali, M, Udalski, A & Szeifert, T 2006, 'Millimagnitude optical photometry for the transiting planetary candidate OGLE-TR-109', Astrophysical Journal, vol. 647, n.º 1 I, pp. 587-593. https://doi.org/10.1086/500921

Millimagnitude optical photometry for the transiting planetary candidate OGLE-TR-109. / Fernández, José Miguel; Minniti, Dante; Pietrzynski, Grzegorz; Gieren, Wolfgang; Ruíz, María Teresa; Zoccali, Manuela; Udalski, Andrzej; Szeifert, Thomas.

En: Astrophysical Journal, Vol. 647, N.º 1 I, 10.08.2006, p. 587-593.

Resultado de la investigación: Article

TY - JOUR

T1 - Millimagnitude optical photometry for the transiting planetary candidate OGLE-TR-109

AU - Fernández, José Miguel

AU - Minniti, Dante

AU - Pietrzynski, Grzegorz

AU - Gieren, Wolfgang

AU - Ruíz, María Teresa

AU - Zoccali, Manuela

AU - Udalski, Andrzej

AU - Szeifert, Thomas

PY - 2006/8/10

Y1 - 2006/8/10

N2 - We present precise V-band photometry for the low-amplitude transit candidate star OGLE-TR-109. This is an extreme case among the transiting candidates found by the OGLE group because of the early spectral type of the star (F0 V), the low transit amplitude (AI = 0.008 mag), and the very short period (P = 0.58909 days) of the orbiting companion. Using difference image photometry, we are able to achieve millimagnitude errors in the individual data points. One transit of this star is well defined in our light curve. This confirms the OGLE detection and rules out the possibility of a false positive. The measurement of this transit allows us to refine the transit amplitude (AV = 0.006 ± 0.001 mag) and the ephemerides for this interesting system, as well as the radius of the possible orbiting companion (RP = 0.90RJ ± 0.09RJ) and the inclination of the orbit (i = 77° ± 5°). Two other transits observed at lower S/N confirm the period of this system measured by OGLE. There is no evidence for a blend of the F-type main-sequence star with a redder eclipsing binary or for secondary transits in the present observations. The absence of ellipsoidal modulation in the light curve of the primary rules out a low-mass star companion or brown dwarf with M > 14MJ ± 8MJ. The remaining possibilities for OGLE-TR-109 are a blend between the F-type star and a binary with a bluer primary star, or a new transiting extrasolar planet.

AB - We present precise V-band photometry for the low-amplitude transit candidate star OGLE-TR-109. This is an extreme case among the transiting candidates found by the OGLE group because of the early spectral type of the star (F0 V), the low transit amplitude (AI = 0.008 mag), and the very short period (P = 0.58909 days) of the orbiting companion. Using difference image photometry, we are able to achieve millimagnitude errors in the individual data points. One transit of this star is well defined in our light curve. This confirms the OGLE detection and rules out the possibility of a false positive. The measurement of this transit allows us to refine the transit amplitude (AV = 0.006 ± 0.001 mag) and the ephemerides for this interesting system, as well as the radius of the possible orbiting companion (RP = 0.90RJ ± 0.09RJ) and the inclination of the orbit (i = 77° ± 5°). Two other transits observed at lower S/N confirm the period of this system measured by OGLE. There is no evidence for a blend of the F-type main-sequence star with a redder eclipsing binary or for secondary transits in the present observations. The absence of ellipsoidal modulation in the light curve of the primary rules out a low-mass star companion or brown dwarf with M > 14MJ ± 8MJ. The remaining possibilities for OGLE-TR-109 are a blend between the F-type star and a binary with a bluer primary star, or a new transiting extrasolar planet.

KW - Planetary systems: formation

KW - Stars: individual (OGLE-TR-109)

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DO - 10.1086/500921

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Fernández JM, Minniti D, Pietrzynski G, Gieren W, Ruíz MT, Zoccali M y otros. Millimagnitude optical photometry for the transiting planetary candidate OGLE-TR-109. Astrophysical Journal. 2006 ago 10;647(1 I):587-593. https://doi.org/10.1086/500921