Homogeneous Distances to Several Stellar Groups in the Second Galactic Quadrant
Affiliation(s)
Department of Physics and Astronomy, University of Wisconsin Oshkosh, Oshkosh, USA. Department of Astronomy, Faculty of Physics, St. Kliment Ohridski University of Sofia, Sofia, Bulgaria.
Department of Physics and Astronomy, University of Wisconsin Oshkosh, Oshkosh, USA. Department of Astronomy, Faculty of Physics, St. Kliment Ohridski University of Sofia, Sofia, Bulgaria.
ABSTRACT
A photometric study in the uvbyβ system of a 20° × 20° field in direction of the Cas OB6 and Per OB1 associations is presented. All currently available uvbyβ photoelectric data are used to obtain homogeneous color excesses and distances of nearly 230 stars of spectral types O-B9. The double cluster h & χ Per, NGC 663 and NGC 1502 are well represented in our sample. The sample also contains the brightest members of the young open clusters IC 1805, IC 1848, St 2, St 7 and ASCC9. We found that, within the errors, h & χ Per, NGC 663, IC 1805, IC 1848 and ASCC9, together with the Per OB1 association are located at very similar distance moduli between 11.0 to 11.3 mag. Our results indicate that the distance spread among these objects is less than the previously estimated, suggested that they could represent starforming complexes located at the same distance.
Cite this paper
N. Kaltcheva, K. Moran, T. Gehrman and V. Golev, "Homogeneous Distances to Several Stellar Groups in the Second Galactic Quadrant," International Journal of Astronomy and Astrophysics, Vol. 3 No. 3, 2013, pp. 10-17. doi: 10.4236/ijaa.2013.33A002.
N. Kaltcheva, K. Moran, T. Gehrman and V. Golev, "Homogeneous Distances to Several Stellar Groups in the Second Galactic Quadrant," International Journal of Astronomy and Astrophysics, Vol. 3 No. 3, 2013, pp. 10-17. doi: 10.4236/ijaa.2013.33A002.
References
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[1] B. Stromgren, “Spectral Classification through PhotoElectric Narrow-Band Photometry,” Annual Review of Astronomy and Astrophysics, Vol. 4, 1966, pp. 433-473. doi:10.1146/annure v.aa.04.090166.002245 [2] D. L. Crawford and J. Mander, “Standard Stars for Photoelectric Hβ Photometry,” The Astronomical Journal, Vol. 71, 1966, pp. 114-118. doi:10.1086/109865 [3] B. Hauck and M. Mermilliod, “uvbyβ Photoelectric Photometric Catalogue,” Astronomy and Astrophysics Supplement Series, Vol. 129, No. 3, 1998, pp. 431-433. doi:10.1051/aas:1998195 [4] J. E. Gaustad, P. R. McCullough, W. Rosing and D. Van Buren, “A Robotic Wide-Angle Hα Survey of the Southern Sky,” Publications of the Astronomical Society of the Pacific, Vol. 113, No. 789, 2001, pp. 1326-1348. doi:10.1086/323969 [5] T. McGlynn, K. Scollick and N. White, “SkyView: The Multi-Wavelength Sky on the Internet,” Proceedings of the 179th Symposium of the International Astronomical Union, Baltimore, 26-30 August 1996, pp. 465-466. [6] N. T. Kaltcheva and R. W. Hilditch, “The Distribution of Bright OB Stars in the Canis Major-Puppis-Vela Region of the Milky Way,” Monthly Notices of the Royal Astronomical Society, Vol. 312, No. 4, 2000, pp. 753-768. doi:10.1046/j.1365-8711.2000.03170.x [7] D. L. Crawford, “Empirical Calibrations of the uvby, β Systems. II. The B-Type Stars,” Astronomical Journal, Vol. 83, No. 1, 1978, pp. 48-63. doi:10.1086/112176 [8] D. Kilkenny and D. C. B. Whittet, “On the Intrinsic ubvy Colours of Early-Type Supergiants,” Monthly Notices of the Royal Astronomical Society, Vol. 216, 1985, pp. 127-137. [9] L. A. Balona and R. R. Shobbrook, “A Re-Calibration of the Luminosities of Early-Type Stars—Its Effect on the Cepheid Luminosity Scale,” Monthly Notices of the Royal Astronomical Society, Vol. 211, 1984, pp. 375-390. [10] N. Kaltcheva and V. Makarov, “The Structure and the Distance of Collinder 121 from Hipparcos and Photometry: Resolving the Discrepancy,” The Astrophysical Journal Letters, Vol. 667, No. 2, pp. L155-L157. [11] N. Kaltcheva and J. Knude, “A Test of B-Type Star Hβ Photometric Distances via the HIPPARCOS Parallaxes,” Astronomy and Astrophysics, Vol. 337, 1998, pp. 178-182. [12] J. Torra, D. Fernández and F. Figueras, “Kinematics of Young Stars. I. Local Irregularities,” Astronomy and Astrophysics, Vol. 359, 2000, pp. 82-102. [13] N. Kaltcheva and V. Golev, “Improved Distances to Several Galactic OB Associations,” Stellar Clusters and Associations: A RIA workshop on GAIA, Granada, 23-27 May 2011, pp. 299-303. http://sca.iaa.es/content/proceedings [14] D. L. Crawford, J. W. Glaspey and C. L. Perry, “FourColor and Hβ Photometry of Open Clusters. IV. h and χ Persei,” The Astronomical Journal, Vol. 75, 1970, pp. 822-830. doi:10.1086/111027 [15] A. Marco and G. Bernabeu, “Photometric Study of the Double Cluster h and χ Persei,” Astronomy and Astrophysics, Vol. 372, No. 2, 2001, pp. 477-494. doi:10.1051/0004-6361:20010441 [16] G. Capilla and J. Fabregat, “CCD uvbyβ Photometry of Young Open Clusters. I. The Double Cluster h and χ Persei,” Astronomy and Astrophysics, Vol. 394, No. 2, 2002, pp. 479-488. doi:10.1051/0004-6361:20021200 [17] L. K. Malysheva, “Parameters of Open Clusters from uvbyβ Photometry,” Astronomy Letters, Vol. 23, No. 5, 1997, pp. 585-590. [18] C. L. Slesnick, L. A. Hillenbrand and Ph. Massey, “The Star Formation History and Mass Function of the Double Cluster h and χ Persei,” The Astrophysical Journal, Vol. 576, No. 2, 2002, pp. 880-893. doi:10.1086/341865 [19] T. Currie, J. Hernandez, J. Irwin, S. J. Kenyon, S. Tokarz, Z. Balog, A. Bragg, P. Berlind and M. Calkins, “The Stellar Population of h and χ Persei: Cluster Properties, Membership, and the Intrinsic Colors and Temperatures of Stars,” The Astrophysical Journal Supplement, Vol. 186, No. 2, 2010, pp. 191-221. doi:10.1088/0067-0049/186/2/191 [20] N. V. Kharchenko, A. E. Piskunov, S. Roser, E. Schilbach and R.-D. Scholz, “Astrophysical Parameters of Galactic Open Clusters,” Astronomy and Astrophysics, Vol. 438, No. 3, 2005, pp. 1163-1173. doi:10.1051/0004-6361:20042523 [21] J. Southworth, P. F. L. Maxted and B. Smalley, “Eclipsing Binaries in Open Clusters—I. V615 Per and V618 Per in h Persei,” Monthly Notices of the Royal Astronomical Society, Vol. 349, No. 2, 2004, pp. 547-559. doi:10.1111/j.1365-2966.2004.07520.x [22] R. M. Humphreys, “Studies of Luminous Stars in Nearby Galaxies. I. Supergiants and O Stars in the Milky Way,” The Astrophysical Journal Supplement, Vol. 38, 1978, pp. 309-350. doi:10.1086/190559 [23] C. D. Garmany and R. E. Stencel, “Galactic OB Associations in the Northern Milky Way Galaxy. I—Longitudes 55° to 150°,” Astronomy and Astrophysics Supplement Series, Vol. 94, No. 2, 1992, pp. 211-244. [24] H.-T. Lee and J. Lim, “On the Formation of Perseus OB1 at High Galactic Latitudes,” The Astrophysical Journal, Vol. 679, No. 2, 2008, pp. 1352-1363. doi:10.1086/587801 [25] J.-C. Mermilliod and E. Paunzen, “Analysing the Database for Stars in Open Clusters. I. General Methods and Description of the Data,” Astronomy and Astrophysics, Vol. 410, No. 2, 2003, pp. 511-518. doi:10.1051/0004-6361:20031112 [26] D. Russeil, “Star-Forming Complexes and the Spiral Structure of Our Galaxy,” Astronomy and Astrophysics, Vol. 397, 2003, pp. 133-146. doi:10.1051/0004-6361:20021504 [27] W. S. Dias, B. S. Alessi, A. Moitinho and J. R. Lépine, “New Catalogue of Optically Visible Open Clusters and Candidates,” EAS Publications Series, Vol. 10, 2003, p. 195. doi:10.1051/eas:2003148