Structure of the Large Magellanic Cloud from near infrared magnitudes of red clump stars

Images with subarcsec spatial resolution in the light of near-infrared atomic (Bry) and molecular hydrogen H2 (S(1) v=1-0) emission lines were obtained for some extended, pointlike objects in the Large Magellanic Cloud (LMC) for the first time. We used the Max-Planck-Institut für extraterrestrische Physik (MPE) near-infrared array spectrometer FAST (image scale 0.8”/pix, spectral resolving power 950) at the ESO/MPI 2.2m telescope, La Silla. We present some results on the 30-Dor complex and N159A5.

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

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stab385 ◽

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.

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An estimate of the structural parameters of the Large Magellanic Cloud using red clump stars

Astronomy and Astrophysics ◽

10.1051/0004-6361/201014201 ◽

2010 ◽

Vol 520 ◽

pp. A24 ◽

Cited By ~ 38

Author(s):

S. Subramanian ◽

A. Subramaniam

Keyword(s):

Structural Parameters ◽

Large Magellanic Cloud ◽

Magellanic Cloud ◽

Red Clump

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

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz2814 ◽

2019 ◽

Vol 490 (3) ◽

pp. 4254-4270 ◽

Cited By ~ 4

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.

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Near-Infrared photometry of the LMC cluster Reticulum

International Astronomical Union Colloquium ◽

10.1017/s0252921100010605 ◽

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.

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AGB Stars in the Large Magellanic Cloud as Seen with DeNIS

Symposium - International Astronomical Union ◽

10.1017/s0074180900118352 ◽

1999 ◽

Vol 190 ◽

pp. 385-386 ◽

Cited By ~ 3

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.

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