A Far-Ultraviolet Survey of 47 Tucanae. I. Imaging*

@article{Knigge2002AFS,
  title={A Far-Ultraviolet Survey of 47 Tucanae. I. Imaging*},
  author={Christian Knigge and David R. Zurek and Michael M. Shara and K. S. Long University of Southampton and UK Space Telescope Science Institute},
  journal={The Astrophysical Journal},
  year={2002},
  volume={579},
  pages={752-759}
}
We present results from the imaging portion of a far-ultraviolet (FUV) survey of the core of 47 Tucanae. We have detected 767 FUV sources, 527 of which have optical counterparts in archival HST/WFPC2 images of the same field. Most of our FUV sources are main-sequence (MS) turnoff stars near the detection limit of our survey. However, the FUV/optical color-magnitude diagram (CMD) also reveals 19 blue stragglers (BSs), 17 white dwarfs (WDs), and 16 cataclysmic variable (CV) candidates. The BSs… 

Figures from this paper

Stellar Exotica in 47 Tucanae
We present far-ultraviolet (FUV) spectroscopy obtained with HST for 48 blue objects in the core of 47 Tuc. Based on their position in a FUV-optical color-magnitude diagram, these were expected to
A multiwavelength survey of NGC 6752: X-ray counterparts, two new dwarf novae and a core-collapsed radial profile
We present the results of a multiwavelength (far-ultraviolet to I band) survey of the stellar populations of the globular cluster NGC 6752, using Space Telescope Imaging Spectrograph (STIS), Advanced
A Far-Ultraviolet Survey of 47 Tucanae. II. The Long-Period Cataclysmic Variable AKO 9
We present time-resolved far-ultraviolet (FUV) spectroscopy and photometry of the 1.1 day eclipsing binary system AKO 9 in the globular cluster 47 Tucanae. The FUV spectrum of AKO 9 is blue and
UNVEILING THE CORE OF THE GLOBULAR CLUSTER M15 IN THE ULTRAVIOLET
We have obtained deep FUV and NUV images of the inner region of the dense globular cluster M15 with the HST ACS. The FUV - NUV color-magnitude diagram shows a well-defined track of horizontal branch
Ultraviolet-bright stellar populations and their evolutionary implications in the collapsed-core cluster M15
We performed deep photometry of the central region of the Galactic globular cluster M15 from archival Hubble Space Telescope data taken on the High Resolution Channel and Solar Blind Channel of the
Ultraviolet stellar population of the old open cluster M67 (NGC 2682)
We present the results of ultraviolet (UV) photometry of the old open cluster M67 obtained using Galaxy Evolution Explorer (GALEX) in far-ultraviolet (FUV) and near-ultraviolet (NUV) bands. UV
FAR-ULTRAVIOLET OBSERVATIONS OF THE GLOBULAR CLUSTER NGC 2808 REVISITED: BLUE STRAGGLERS, WHITE DWARFS, AND CATACLYSMIC VARIABLES
We present a reanalysis of far-ultraviolet (FUV) observations of the globular cluster NGC 2808 obtained with the Hubble Space Telescope. These data were first analyzed by Brown and coworkers, with an
A DEEP CHANDRA SURVEY OF THE GLOBULAR CLUSTER 47 TUCANAE: CATALOG OF POINT SOURCES
We have detected 300 X-ray sources within the half-mass radius (279) of the globular cluster 47 Tucanae in a deep (281 ks) Chandra exposure. We perform photometry and simple spectral fitting for our
Near-ultraviolet detections of four dwarf nova candidates in the globular cluster 47 Tucanae
We investigate near-ultraviolet variability in the Galactic globular cluster (GC) 47 Tucanae (47 Tuc). This work was undertaken within the GC sub-project of the Transient UV Objects project, a
An Extensive Census of Hubble Space Telescope Counterparts to Chandra X-Ray Sources in the Globular Cluster 47 Tucanae. I. Astrometry and Photometry*
We report in this study of 47 Tucanae the largest number of optical identifications of X-ray sources yet obtained in a single globular cluster. Using deep Chandra ACIS-I imaging and extensive Hubble
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 29 REFERENCES
Blue Stragglers, Young White Dwarfs, and UV-Excess Stars in the Core of 47 Tucanae*
We used a set of archived Hubble Space Telescope/WFPC2 images to probe the stellar population in the core of the nearby galactic globular cluster (GGC) 47 Tuc. From the ultraviolet (UV) color
The structure of the core of 47 Tucanae from Hubble Space Telescope observations
A set of moderately deep, high-resolution images of the core of the Galactic globular cluster NGC 104 (47 Tucanae) taken by tbe Faint Object Camera F/48 relay on the Hubble Space Telescope through
Resolving the Controversy over the Core Radius of 47 Tucanae (NGC 104)
This paper investigates the discrepancy between recent measurements of the density profile of the globular cluster 47 Tuc that have used Hubble Space Telescope data sets. A large core radius would
High-Resolution X-ray Imaging of a Globular Cluster Core: Compact Binaries in 47Tuc
TLDR
These observations provide the first x-ray “color-magnitude” diagram for a globular cluster and census of its compact object and binary population.
Cataclysmic Variables and a New Class of Faint Ultraviolet Stars in the Globular Cluster NGC 6397
We present evidence that the globular cluster NGC 6397 contains two distinct classes of centrally concentrated UV-bright stars. Color-magnitude diagrams constructed from U -->336, B -->439, V -->555,
The White Dwarf Distance to the Globular Cluster 47 Tucanae and its Age
We present a new determination of the distance (and age) of the Galactic globular cluster 47 Tucanae (NGC 104) based on the fit of its white dwarf (WD) cooling sequence with the empirical fiducial
The Frequency of Binary Stars in the Core of 47 Tucanae
Differential time series photometry has been derived for 46,422 main-sequence stars in the core of 47 Tucanae. The observations consisted of near-continuous 160 s exposures alternating between the
White Dwarfs in Globular Clusters: Hubble Space Telescope Observations of M4*
Using WFPC2 on the Hubble Space Telescope, we have isolated a sample of 258 white dwarfs (WDs) in the Galactic globular cluster M4. Fields at three radial distances from the cluster center were
Goddard High-Resolution Spectrograph Observations of Cool Low-Gravity Stars. IV. A Comparison of the K5 III stars α Tauri and γ Draconis*
The Goddard High-Resolution Spectrograph (GHRS) has observed the K5 III star α Tau in the 2330 A region on three separate occasions. These spectra show marked changes with time, with the UV continuum
The first detection of ionized helium in the local ISM - EUVE and IUE spectroscopy of the hot DA white dwarf GD 246
We report observations of the extreme ultraviolet spectrum of the hot degenerate star GD 246 obtained with the EUVE. Our initial attempt at modeling the photospheric emission from the white dwarf
...
1
2
3
...