scholarly journals THE ARAUCARIA PROJECT: THE DISTANCE TO THE SMALL MAGELLANIC CLOUD FROM NEAR-INFRARED PHOTOMETRY OF RR LYRAE VARIABLES

2009 ◽  
Vol 138 (6) ◽  
pp. 1661-1666 ◽  
Author(s):  
Olaf Szewczyk ◽  
Grzegorz Pietrzyński ◽  
Wolfgang Gieren ◽  
Anna Ciechanowska ◽  
Fabio Bresolin ◽  
...  
Keyword(s):  
Near Infrared ◽  
Magellanic Cloud ◽  
Small Magellanic Cloud ◽  
Infrared Photometry ◽  
Rr Lyrae

scholarly journals Near-Infrared photometry of the LMC cluster Reticulum

2004 ◽  
Vol 193 ◽  
pp. 189-192
Author(s):  
M. Dall’Ora ◽  
G. Bono ◽  
J. Storm ◽  
V. Ripepi ◽  
V. Testa ◽  
...  
Keyword(s):  
Data Reduction ◽  
Near Infrared ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Distance Estimate ◽  
Infrared Photometry ◽  
Rr Lyrae Stars ◽  
Rr Lyrae ◽  
Lyrae Stars

AbstractWe present U, B, V, I (SUSI@NTT) and J,Ks (SOFI@NTT) photometry of the Large Magellanic Cloud (LMC) cluster Reticulum. The observing strategy and data reduction (DAOPHOTII/ALLFRAME) allowed us to reach an accuracy of the order of 0.01 – 0.03 mag in all the bands at limiting magnitudes typical of RR Lyrae stars. Reticulum hosts a sizable sample of RR Lyrae stars (32), and we supply an accurate distance estimate using the RR Lyrae K-band Period-Luminosity-Metallicity (PLZK) relation. This method presents several advantages when compared with the MV vs [Fe/H] relation, since it is only marginally affected by off-ZAHB evolutionary effects and reddening corrections.

scholarly journals THE ARAUCARIA PROJECT. THE DISTANCE OF THE LARGE MAGELLANIC CLOUD FROM NEAR-INFRARED PHOTOMETRY OF RR LYRAE VARIABLES

2008 ◽  
Vol 136 (1) ◽  
pp. 272-279 ◽  
Author(s):  
Olaf Szewczyk ◽  
Grzegorz Pietrzyński ◽  
Wolfgang Gieren ◽  
Jesper Storm ◽  
Alistair Walker ◽  
...  
Keyword(s):  
Near Infrared ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Infrared Photometry ◽  
Rr Lyrae

scholarly journals NEAR-INFRARED PHOTOMETRY OF FOUR STELLAR CLUSTERS IN THE SMALL MAGELLANIC CLOUD

2008 ◽  
Vol 690 (1) ◽  
pp. 288-294 ◽  
Author(s):  
Alessio Mucciarelli ◽  
Livia Origlia ◽  
Claudia Maraston ◽  
Francesco R. Ferraro
Keyword(s):  
Near Infrared ◽  
Magellanic Cloud ◽  
Stellar Clusters ◽  
Small Magellanic Cloud ◽  
Infrared Photometry

scholarly journals UVIT-HST-Gaia-VISTA study of KRON 3 in the Small Magellanic Cloud: A cluster with an extended red clump in UV

2021 ◽  
Author(s):  
P K Nayak ◽  
A Subramaniam ◽  
S Subramanian ◽  
S Sahu ◽  
C Mondal ◽  
...  
Keyword(s):  
Near Infrared ◽  
Spectral Energy Distribution ◽  
Variable Mass ◽  
Intrinsic Property ◽  
Small Variation ◽  
Magellanic Cloud ◽  
Spectral Energy ◽  
Small Range ◽  
Small Magellanic Cloud ◽  
Red Clump

Abstract We have demonstrated the advantage of combining multi-wavelength observations, from the ultraviolet (UV) to near-infrared, to study Kron 3, a massive star cluster in the Small Magellanic Cloud. We have estimated the radius of the cluster Kron 3 to be 2${_{.}^{\prime}}$0 and for the first time, we report the identification of NUV-bright red clump (RC) stars and the extension of the RC in colour and magnitude in the NUV versus (NUV−optical) colour-magnitude diagram (CMD). We found that extension of the RC is an intrinsic property of the cluster and it is not due to contamination of field stars or differential reddening across the field. We studied the spectral energy distribution of the RC stars, and estimated a small range in temperature ∼5000–5500 K, luminosity ∼60–90 L⊙ and radius ∼8.0–11.0 R⊙ supporting their RC nature. The range of UV magnitudes amongst the RC stars (∼23.3 to 24.8 mag) is likely caused by the combined effects of variable mass loss, variation in initial helium abundance (Yini = 0.23 to 0.28), and a small variation in age (6.5-7.5 Gyr) and metallicity ([Fe/H] = −1.5 to −1.3). Spectroscopic follow-up observations of RC stars in Kron 3 are necessary to confirm the cause of the extended RC.

scholarly journals SPITZERSAGE-SMC INFRARED PHOTOMETRY OF MASSIVE STARS IN THE SMALL MAGELLANIC CLOUD

2010 ◽  
Vol 140 (2) ◽  
pp. 416-429 ◽  
Author(s):  
A. Z. Bonanos ◽  
D. J. Lennon ◽  
F. Köhlinger ◽  
J. Th. van Loon ◽  
D. L. Massa ◽  
...  
Keyword(s):  
Massive Stars ◽  
Magellanic Cloud ◽  
Small Magellanic Cloud ◽  
Infrared Photometry

scholarly journals Standard Galactic field RR Lyrae II: a Gaia DR2 calibration of the period–Wesenheit–metallicity relation

2019 ◽  
Vol 490 (3) ◽  
pp. 4254-4270 ◽  
Author(s):  
Jillian R Neeley ◽  
Massimo Marengo ◽  
Wendy L Freedman ◽  
Barry F Madore ◽  
Rachael L Beaton ◽  
...  
Keyword(s):  
Near Infrared ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Distance Modulus ◽  
Rr Lyrae Stars ◽  
Galactic Field ◽  
Rr Lyrae ◽  
Lyrae Stars ◽  
Distance Indicators ◽  
Made In

ABSTRACT RR Lyrae stars have long been popular standard candles, but significant advances in methodology and technology have been made in recent years to increase their precision as distance indicators. We present multiwavelength (optical UBVRcIc and Gaia G, BP, RP; near-infrared JHKs; mid-infrared [3.6], [4.5]) period–luminosity–metallicity (PLZ), period–Wesenheit–metallicity (PWZ) relations, calibrated using photometry obtained from the Carnegie RR Lyrae Program and parallaxes from the Gaia second data release for 55 Galactic field RR Lyrae stars. The metallicity slope, which has long been predicted by theoretical relations, can now be measured in all passbands. The scatter in the PLZ relations is on the order of 0.2 mag, and is still dominated by uncertainties in the parallaxes. As a consistency check of our PLZ relations, we also measure the distance modulus to the globular cluster M4, the Large Magellanic Cloud and the Small Magellanic Cloud, and our results are in excellent agreement with estimates from previous studies.

scholarly journals AGB Stars in the Large Magellanic Cloud as Seen with DeNIS

1999 ◽  
Vol 190 ◽  
pp. 385-386 ◽  
Author(s):  
M. R. Cioni ◽  
H. J. Habing ◽  
C. Loup ◽  
N. Epchtein ◽  
the DeNIS Consortium
Keyword(s):  
Near Infrared ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Agb Stars ◽  
Infrared Photometry ◽  
Sky Survey ◽  
Right Ascension

We present infrared photometry of LMC stars taken from a region of 2.5° in right ascension from the DeNIS (Deep Near Infrared Southern Sky Survey) survey.

scholarly journals The Near Infrared Properties of Selected WN Stars in the Large Magellanic Cloud

1982 ◽  
Vol 99 ◽  
pp. 231-235
Author(s):  
N. Panagia ◽  
E.G. Tanzi ◽  
M. Tarenghi
Keyword(s):  
Near Infrared ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Infrared Photometry ◽  
Central Object ◽  
30 Doradus

We report here on preliminary infrared photometry of six WN stars in the Large Magellanic Cloud. Besides R136, the central object of the 30 Doradus Nebula, the sample includes three stars (R139, R140, R145) located near the center of the region (within ∼ 1 arcmin) and two more stars (R144, R147) at a distance of ∼ 5 arcmin from R136.

scholarly journals Morphology of the Small Magellanic Cloud using multiwavelength photometry of classical Cepheids

2019 ◽  
Vol 489 (3) ◽  
pp. 3725-3738 ◽  
Author(s):  
Sukanta Deb ◽  
Kerdaris Kurbah ◽  
Harinder P Singh ◽  
Shashi M Kanbur ◽  
Chow-Choong Ngeow ◽  
...  
Keyword(s):  
Near Infrared ◽  
Weighted Average ◽  
Major Axis ◽  
Magellanic Cloud ◽  
Triaxial Ellipsoid ◽  
Distance Modulus ◽  
Viewing Angle ◽  
Small Magellanic Cloud ◽  
Distance Measurements ◽  
Classical Cepheids

ABSTRACT This is the second of a series related to the study of geometry of the Magellanic Clouds based on multiwavelength photometry of classical Cepheids. In this paper we determine the geometrical and viewing angle parameters of the Small Magellanic Cloud (SMC) using the Leavitt law for classical Cepheids with/without a break in the law at a certain period as reported in the literature. The study utilizes photometric data for more than 3400 common classical Cepheids (Fundamental (FU) and First overtone (FO)) in optical (V, I), near-infrared (Y, J, Ks) and mid-infrared ([3.6] and [4.5] μm) photometric bands. We obtain statistical reddening and distance modulus free from the effect of reddening to each of the individual Cepheids with respect to the mean distance modulus and reddening of the SMC. The reddening maps of the SMC obtained from the analyses with/without breaks in the Leavitt law show good agreement with each other as well as with other maps available in the literature. The Cartesian coordinates of individual stars with respect to the galaxy plane are obtained using the information of equatorial coordinates (α, δ) as well as extinction-free distance measurements. Modelling the observed 3D distribution of the Cepheids as a triaxial ellipsoid, we obtain the geometrical and viewing angle parameters of the SMC. The weighted average yields the following values of parameters for the SMC: the geometrical axes ratios of 1.000 ± 0.001: 1.544 ± 0.002: 9.742 ± 0.030 and the viewing angle parameters having inclination angle i = 3${^{\circ}_{.}}$465 ± 0${^{\circ}_{.}}$030 with respect to the longest axis from the line of sight and position angle of line of nodes (major axis) θlon = 63${^{\circ}_{.}}$086 ± 0${^{\circ}_{.}}$117.

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