C. Ulusoy, E. Niemczura, B. Ulaş, T. Gülmez,
... in the Southern open cluster NGC 6200: ALS 3728. Spectroscopic and photometric observations of NGC 6200 stars were carried out at the South African Astronomical Observatory (SAAO) in 2011. It was found that ALS 3728 has a frequency of about 4.95 d− ...
Tópico(s): Astronomy and Astrophysical Research
2013 - Elsevier BV | New Astronomy
G. Kovács, J. D. Hartman, G. Á. Bakos, Samuel N. Quinn, K. Penev, David W. Latham, W. Bhatti, Z. Csubry, M. de Val-Borro,
By using the dense coverage of the extrasolar planet survey project HATNet, we Fourier analyze 381 high-probability members of the nearby open cluster Praesepe (Beehive/M44/NGC 2632). In addition to the detection of 10 variables (of \delta Scuti and other types), we identify 180 rotational variables (including the two known planet hosts). This sample increases the number of known rotational variables in this cluster for spectral classes earlier than M by more than a factor of three. These stars closely ...
Tópico(s): Astronomy and Astrophysical Research
2014 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Produção Nacional
Revisado por pares
T. V. Ricci, J. E. Steiner, R. B. Menezes,
... an outflow together with a gaseous disc. In NGC 3136, an ionization bicone is present in addition ...
Tópico(s): Astrophysics and Star Formation Studies
2015 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Produção Nacional
Revisado por pares
İnci Akkaya Oralhan, Hikmet Çakmak, Yüksel Karataş, Raúl Michel, C. Bonatto,
ABSTRACT We derive astrophysical parameters of the open cluster NGC 1513 by means of colour indices built with new CCD UBV(RI)KC photometry. Based on early-type members, the mean foreground reddening and total to selective extinction ratio are E(B − V) = 0.79 ± 0.09 mag and RV = 2.85 ± 0.05. Through the differential grid method, we derive the metal abundance [Fe/H] = −0.06 dex (Z = +0.013), which is consistent with the value [Fe/H] = −0.088 of the bright giant member – LAMOST 695710060. Z = +0.013 isochrone fit to the V × (B − ...
Tópico(s): Astronomy and Astrophysical Research
2024 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
E. M. L. Humphreys, A. L. Argon, L. J. Greenhill, M. J. Reid, J. M. Moran,
Tópico(s): Astrophysical Phenomena and Observations
2005 - Springer Science+Business Media | Astrophysics and Space Science