The araucaria project: Near-infrared photometry of Cepheid variables in the Sculptor galaxy NGC 300

Wolfgang Gieren, Grzegorz Pietrzyński, Igor Soszyński, Fabio Bresolin, Rolf Peter Kudritzki, Dante Minniti, Jesper Storm

Resultado de la investigación: Article

94 Citas (Scopus)

Resumen

We have obtained deep near-infrared images in J and K filters of three fields in the Sculptor galaxy NGC 300 with the ESO VLT and ISAAC Camera. For 16 Cepheid variables in these fields, we have determined J and K magnitudes at two different epochs and have derived their mean magnitudes in these bands. The slopes of the resulting period-luminosity relations are in very good agreement with the slopes of these relations measured in the Large Magellanic Cloud (LMC) by Persson et al. Fitting the LMC slopes to our data, we have derived distance moduli in J and K. Using these values together with the values derived in the optical V and I bands in our previous work, we have determined an improved total reddening for NGC 300 of E(B-V) = 0.096±0.006 mag, which yields extremely consistent values for the absorption-corrected distance modulus of the galaxy from VIJK bands. Our distance result for NGC 300 from this combined optical/near-infrared Cepheid study is (m - M)0 = 26.37±0.05 (random)±0.03 (systematic) mag and is tied to an adopted true LMC distance modulus of 18.50 mag. Both random and systematic uncertainties are dominated by photometric errors, while errors due to reddening, metallicity effects, and crowding are less important. Our distance determination is consistent with the earlier result from near-infrared (H-band) photometry of two Cepheids in NGC 300 by Madore et al., but far more accurate. Our distance value also agrees with the HST Key Project result of Freedman et al. and with the recent distance estimate for NGC 300 from Butler et al. from the tip of the red giant branch (TRGB) I-band magnitude when our improved reddening is used to calculate the absorption corrections. Our distance results from the different optical and near-infrared bands indicate that the reddening law in NGC 300 must be very similar to the Galactic one. With the results of this work, the distance of NGC 300 relative to the LMC now seems determined with an accuracy of approximately ±3%. The distance to this nearby Sculptor galaxy is therefore now known with higher accuracy than that of most (nearer) Local Group galaxies.

Idioma originalEnglish
Páginas (desde-hasta)695-703
Número de páginas9
PublicaciónAstrophysical Journal
Volumen628
N.º2 I
DOI
EstadoPublished - 1 ago 2005

Huella dactilar

cepheid variables
infrared photometry
near infrared
galaxies
Magellanic clouds
slopes
filter
project
crowding
extremely high frequencies
European Southern Observatory
metallicity
photometry
cameras
luminosity
time measurement

ASJC Scopus subject areas

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

Citar esto

Gieren, W., Pietrzyński, G., Soszyński, I., Bresolin, F., Kudritzki, R. P., Minniti, D., & Storm, J. (2005). The araucaria project: Near-infrared photometry of Cepheid variables in the Sculptor galaxy NGC 300. Astrophysical Journal, 628(2 I), 695-703. https://doi.org/10.1086/430903
Gieren, Wolfgang ; Pietrzyński, Grzegorz ; Soszyński, Igor ; Bresolin, Fabio ; Kudritzki, Rolf Peter ; Minniti, Dante ; Storm, Jesper. / The araucaria project : Near-infrared photometry of Cepheid variables in the Sculptor galaxy NGC 300. En: Astrophysical Journal. 2005 ; Vol. 628, N.º 2 I. pp. 695-703.
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title = "The araucaria project: Near-infrared photometry of Cepheid variables in the Sculptor galaxy NGC 300",
abstract = "We have obtained deep near-infrared images in J and K filters of three fields in the Sculptor galaxy NGC 300 with the ESO VLT and ISAAC Camera. For 16 Cepheid variables in these fields, we have determined J and K magnitudes at two different epochs and have derived their mean magnitudes in these bands. The slopes of the resulting period-luminosity relations are in very good agreement with the slopes of these relations measured in the Large Magellanic Cloud (LMC) by Persson et al. Fitting the LMC slopes to our data, we have derived distance moduli in J and K. Using these values together with the values derived in the optical V and I bands in our previous work, we have determined an improved total reddening for NGC 300 of E(B-V) = 0.096±0.006 mag, which yields extremely consistent values for the absorption-corrected distance modulus of the galaxy from VIJK bands. Our distance result for NGC 300 from this combined optical/near-infrared Cepheid study is (m - M)0 = 26.37±0.05 (random)±0.03 (systematic) mag and is tied to an adopted true LMC distance modulus of 18.50 mag. Both random and systematic uncertainties are dominated by photometric errors, while errors due to reddening, metallicity effects, and crowding are less important. Our distance determination is consistent with the earlier result from near-infrared (H-band) photometry of two Cepheids in NGC 300 by Madore et al., but far more accurate. Our distance value also agrees with the HST Key Project result of Freedman et al. and with the recent distance estimate for NGC 300 from Butler et al. from the tip of the red giant branch (TRGB) I-band magnitude when our improved reddening is used to calculate the absorption corrections. Our distance results from the different optical and near-infrared bands indicate that the reddening law in NGC 300 must be very similar to the Galactic one. With the results of this work, the distance of NGC 300 relative to the LMC now seems determined with an accuracy of approximately ±3{\%}. The distance to this nearby Sculptor galaxy is therefore now known with higher accuracy than that of most (nearer) Local Group galaxies.",
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author = "Wolfgang Gieren and Grzegorz Pietrzyński and Igor Soszyński and Fabio Bresolin and Kudritzki, {Rolf Peter} and Dante Minniti and Jesper Storm",
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Gieren, W, Pietrzyński, G, Soszyński, I, Bresolin, F, Kudritzki, RP, Minniti, D & Storm, J 2005, 'The araucaria project: Near-infrared photometry of Cepheid variables in the Sculptor galaxy NGC 300', Astrophysical Journal, vol. 628, n.º 2 I, pp. 695-703. https://doi.org/10.1086/430903

The araucaria project : Near-infrared photometry of Cepheid variables in the Sculptor galaxy NGC 300. / Gieren, Wolfgang; Pietrzyński, Grzegorz; Soszyński, Igor; Bresolin, Fabio; Kudritzki, Rolf Peter; Minniti, Dante; Storm, Jesper.

En: Astrophysical Journal, Vol. 628, N.º 2 I, 01.08.2005, p. 695-703.

Resultado de la investigación: Article

TY - JOUR

T1 - The araucaria project

T2 - Near-infrared photometry of Cepheid variables in the Sculptor galaxy NGC 300

AU - Gieren, Wolfgang

AU - Pietrzyński, Grzegorz

AU - Soszyński, Igor

AU - Bresolin, Fabio

AU - Kudritzki, Rolf Peter

AU - Minniti, Dante

AU - Storm, Jesper

PY - 2005/8/1

Y1 - 2005/8/1

N2 - We have obtained deep near-infrared images in J and K filters of three fields in the Sculptor galaxy NGC 300 with the ESO VLT and ISAAC Camera. For 16 Cepheid variables in these fields, we have determined J and K magnitudes at two different epochs and have derived their mean magnitudes in these bands. The slopes of the resulting period-luminosity relations are in very good agreement with the slopes of these relations measured in the Large Magellanic Cloud (LMC) by Persson et al. Fitting the LMC slopes to our data, we have derived distance moduli in J and K. Using these values together with the values derived in the optical V and I bands in our previous work, we have determined an improved total reddening for NGC 300 of E(B-V) = 0.096±0.006 mag, which yields extremely consistent values for the absorption-corrected distance modulus of the galaxy from VIJK bands. Our distance result for NGC 300 from this combined optical/near-infrared Cepheid study is (m - M)0 = 26.37±0.05 (random)±0.03 (systematic) mag and is tied to an adopted true LMC distance modulus of 18.50 mag. Both random and systematic uncertainties are dominated by photometric errors, while errors due to reddening, metallicity effects, and crowding are less important. Our distance determination is consistent with the earlier result from near-infrared (H-band) photometry of two Cepheids in NGC 300 by Madore et al., but far more accurate. Our distance value also agrees with the HST Key Project result of Freedman et al. and with the recent distance estimate for NGC 300 from Butler et al. from the tip of the red giant branch (TRGB) I-band magnitude when our improved reddening is used to calculate the absorption corrections. Our distance results from the different optical and near-infrared bands indicate that the reddening law in NGC 300 must be very similar to the Galactic one. With the results of this work, the distance of NGC 300 relative to the LMC now seems determined with an accuracy of approximately ±3%. The distance to this nearby Sculptor galaxy is therefore now known with higher accuracy than that of most (nearer) Local Group galaxies.

AB - We have obtained deep near-infrared images in J and K filters of three fields in the Sculptor galaxy NGC 300 with the ESO VLT and ISAAC Camera. For 16 Cepheid variables in these fields, we have determined J and K magnitudes at two different epochs and have derived their mean magnitudes in these bands. The slopes of the resulting period-luminosity relations are in very good agreement with the slopes of these relations measured in the Large Magellanic Cloud (LMC) by Persson et al. Fitting the LMC slopes to our data, we have derived distance moduli in J and K. Using these values together with the values derived in the optical V and I bands in our previous work, we have determined an improved total reddening for NGC 300 of E(B-V) = 0.096±0.006 mag, which yields extremely consistent values for the absorption-corrected distance modulus of the galaxy from VIJK bands. Our distance result for NGC 300 from this combined optical/near-infrared Cepheid study is (m - M)0 = 26.37±0.05 (random)±0.03 (systematic) mag and is tied to an adopted true LMC distance modulus of 18.50 mag. Both random and systematic uncertainties are dominated by photometric errors, while errors due to reddening, metallicity effects, and crowding are less important. Our distance determination is consistent with the earlier result from near-infrared (H-band) photometry of two Cepheids in NGC 300 by Madore et al., but far more accurate. Our distance value also agrees with the HST Key Project result of Freedman et al. and with the recent distance estimate for NGC 300 from Butler et al. from the tip of the red giant branch (TRGB) I-band magnitude when our improved reddening is used to calculate the absorption corrections. Our distance results from the different optical and near-infrared bands indicate that the reddening law in NGC 300 must be very similar to the Galactic one. With the results of this work, the distance of NGC 300 relative to the LMC now seems determined with an accuracy of approximately ±3%. The distance to this nearby Sculptor galaxy is therefore now known with higher accuracy than that of most (nearer) Local Group galaxies.

KW - Cepheids

KW - Distance scale

KW - Galaxies: distances and redshifts

KW - Galaxies: individual (NGC 300)

KW - Infrared: stars

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U2 - 10.1086/430903

DO - 10.1086/430903

M3 - Article

AN - SCOPUS:25144516693

VL - 628

SP - 695

EP - 703

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

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