dc.creator |
Minniti, Dante |
|
dc.creator |
Palma, Tali |
|
dc.creator |
Dékány, Istvan |
|
dc.creator |
Hempel, Marin |
|
dc.creator |
Rekjuba, Marina |
|
dc.creator |
Pullen, Joyce |
|
dc.creator |
Alonso-García, Javier |
|
dc.creator |
Barbá, Rodolfo |
|
dc.creator |
Barbuy, Beatriz |
|
dc.creator |
Majaess, Daniel J. |
|
dc.date.accessioned |
2024-09-12T16:13:23Z |
|
dc.date.available |
2024-09-12T16:13:23Z |
|
dc.date.issued |
2017-03-20 |
|
dc.identifier.issn |
2041-8205 |
|
dc.identifier.uri |
https://dx.doi.org/10.3847/2041-8213/838/1/L14 |
|
dc.identifier.uri |
http://library2.smu.ca/xmlui/handle/01/32015 |
|
dc.description |
Published version. |
en_CA |
dc.description.abstract |
We use deep multi-epoch near-IR images of the VISTA Variables in the Vía Láctea (VVV) Survey to search for RR Lyrae stars toward the Southern Galactic plane. Here, we report the discovery of a group of RR Lyrae stars close together in VVV tile d025. Inspection of the VVV images and PSF photometry reveals that most of these stars are likely to belong to a globular cluster that matches the position of the previously known star cluster FSR 1716. The stellar density map of the field yields a >100 detection for this candidate globular cluster that is centered at equatorial coordinates R.A.J2000 = 16:10:30.0, decl.J2000 = −53:44:56 and galactic coordinates l = 329.77812, b = −1.59227. The color-magnitude diagram of this object reveals a well-populated red giant branch, with a prominent red clump at Ks = 13.35 0.05, and J − Ks = 1.30 0.05. We present the cluster RR Lyrae positions, magnitudes, colors, periods, and amplitudes. The presence of RR Lyrae indicates an old globular cluster, with an age >10 Gyr. We classify this object as an Oosterhoff type I globular cluster, based on the mean period of its RR Lyrae type ab, days, and argue that this is a relatively metal-poor cluster with [Fe/H] = −1.5 0.4 dex. The mean extinction and reddening for this cluster are and E(J − Ks) = 0.72 0.02 mag, respectively, as measured from the RR Lyrae colors and the near-IR color-magnitude diagram. We also measure the cluster distance using the RR Lyrae type ab stars. The cluster mean distance modulus is (m − M)0 = 14.38 0.03 mag, implying a distance D = 7.5 0.2 kpc and a Galactocentric distance RG = 4.3 kpc. |
en_CA |
dc.description.provenance |
Submitted by Anna Labrador (anna.labrador@smu.ca) on 2024-09-12T16:13:23Z
No. of bitstreams: 1
Majaess_Daniel_J._2017a.pdf: 1434112 bytes, checksum: 46315f897ee64da846bb740e0c3a1e6b (MD5) |
en |
dc.description.provenance |
Made available in DSpace on 2024-09-12T16:13:23Z (GMT). No. of bitstreams: 1
Majaess_Daniel_J._2017a.pdf: 1434112 bytes, checksum: 46315f897ee64da846bb740e0c3a1e6b (MD5)
Previous issue date: 2017-03-20 |
en |
dc.language.iso |
en |
en_CA |
dc.publisher |
The American Astronomical Society |
en_CA |
dc.title |
FSR 1716: A New Milky Way Globular Cluster Confirmed Using VVV RR Lyrae Stars |
en_CA |
dc.type |
Article |
en_CA |
dcterms.bibliographicCitation |
Astrophysical journal. Letters 838 (1), L14-L14. (2017) |
en_CA |