scholarly journals Deep [ITAL]Hubble Space Telescope[/ITAL] WFPC2 Photometry of NGC 288. I. Binary Systems and Blue Stragglers

2002 ◽  
Vol 123 (3) ◽  
pp. 1509-1527 ◽  
Author(s):  
Michele Bellazzini ◽  
Flavio Fusi Pecci ◽  
Maria Messineo ◽  
Lorenzo Monaco ◽  
Robert T. Rood
Keyword(s):  
Binary Systems ◽  
Hubble Space Telescope ◽  
Space Telescope ◽  
Blue Stragglers

Stellar Variability in the Central Populations of 47 Tucanae from WF/PC Observations with the Hubble Space Telescope. II. Binary Systems

1996 ◽  
Vol 468 ◽  
pp. 241 ◽  
Author(s):  
Peter D. Edmonds ◽  
Ronald L. Gilliland ◽  
Puragra Guhathakurta ◽  
Larry D. Petro ◽  
Abhijit Saha ◽  
...  
Keyword(s):  
Binary Systems ◽  
Hubble Space Telescope ◽  
Space Telescope

scholarly journals X-Ray Binaries in M51 I: Catalog and Statistics

2021 ◽  
Vol 922 (2) ◽  
pp. 178
Author(s):  
Jared R. Rice ◽  
Blagoy Rangelov ◽  
Andrea Prestwich ◽  
Rupali Chandar ◽  
Luis Bichon ◽  
...  
Keyword(s):  
Optical Properties ◽  
Data Analysis ◽  
Luminosity Function ◽  
Binary Systems ◽  
Hubble Space Telescope ◽  
Archival Data ◽  
Optical Counterpart ◽  
Space Telescope ◽  
X Ray ◽  
X Ray Binaries

Abstract We used archival data from the Chandra X-ray Observatory (Chandra) and the Hubble Space Telescope, to identify 334 candidate X-ray binary systems and their potential optical counterparts in the interacting galaxy pair NGC 5194/5195 (M51). We present the catalog and data analysis of X-ray and optical properties for those sources, from the deep 892 ks Chandra observations, along with the magnitudes of candidate optical sources as measured in the 8.16 ks Hubble Space Telescope observations. The X-ray luminosity function of the X-ray sources above a few times 1036 erg s−1 follows a power law N ( > L X , b ) ∝ L X , b 1 − α with α = 1.65 ± 0.03. Approximately 80% of sources are variable over a 30 day window. Nearly half of the X-ray sources (173/334) have an optical counterpart within 0.″5.

3D time-dependent hydrodynamical and radiative transfer modeling of Eta Carinae’s innermost fossil colliding wind structures

2018 ◽  
Vol 14 (S346) ◽  
pp. 62-66
Author(s):  
Thomas Madura ◽  
T. R. Gull ◽  
N. Clementel ◽  
M. Corcoran ◽  
A. Damineli ◽  
...  
Keyword(s):  
Radiative Transfer ◽  
Binary Systems ◽  
Hubble Space Telescope ◽  
Synthetic Data ◽  
Theoretical Models ◽  
Emission Lines ◽  
Time Dependent ◽  
Space Telescope ◽  
Data Cubes ◽  
Eta Carinae

AbstractEta Carinae is the most massive active binary within 10,000 light-years. While famous for the largest non-terminal stellar explosion ever recorded, observations reveal a supermassive (∼120 M⊙) binary consisting of an LBV and either a WR or extreme O star in a very eccentric orbit (e=0.9) with a 5.54-year period. Dramatic changes across multiple wavelengths are routinely observed as the stars move about in their highly elliptical orbits, especially around periastron when the hot (∼40 kK) companion star delves deep into the denser and much cooler (∼15 kK) extended wind photosphere of the LBV primary. Many of these changes are due to a dynamic wind-wind collision region (WWCR) that forms between the stars, plus expanding radiation-illuminated fossil WWCRs formed one, two, and three 5.54-year orbital cycles ago. These fossil WWCRs have been spatially and spectrally resolved by the Hubble Space Telescope/Space Telescope Imaging Spectrograph (HST/STIS) at multiple epochs, resulting in data cubes that spatially map Eta Carinae’s innermost WWCRs and follow temporal changes in several forbidden emission lines (e.g. [Fe iii] 4659 Å, [Fe ii] 4815 Å) across the 5.54-year cycle. We present initial results of 3D time-dependent hydrodynamical and radiative-transfer simulations of the Eta Carinae binary and its WWCRs with the goal of producing synthetic data cubes of forbidden emission lines for comparison to the available HST/STIS observations. Comparison of the theoretical models to the observations reveals important details about the binary’s orbital motion, photoionization properties, and recent (5–15year) mass loss history. Such an analysis also provides a baseline for following future changes in Eta Carinae, essential for understanding the late-stage evolution of a nearby supernova progenitor. Our modeling methods can also be adapted to a number of other colliding wind binary systems (e.g. WR 140) that are scheduled to be studied with future observatories (e.g. the James Webb Space Telescope).

scholarly journals Far-Ultraviolet Surveys of Globular Clusters: Searching for the Products of Stellar Collisions and Near Misses

2004 ◽  
Vol 194 ◽  
pp. 77-78
Author(s):  
C. Knigge ◽  
D. R. Zurek ◽  
M. M. Shara ◽  
K. S. Long ◽  
R. L. Gilliland ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Hubble Space Telescope ◽  
Cataclysmic Variables ◽  
Stellar Populations ◽  
Space Telescope ◽  
Near Misses ◽  
Blue Stragglers ◽  
Stellar Collisions ◽  
Far Ultraviolet

AbstractFar-ultraviolet (FUV) observations with the Hubble Space Telescope are an excellent way to find and study the hot, blue stellar populations in the cores of globular clusters. These populations include dynamically formed blue stragglers and interacting binaries (such as cataclysmic variables, i.e. the products of stellar collisions and near misses. Using the cluster 47 Tuc as an example, we show how the combination of FUV imaging and slitless spectroscopy can be used to uncover and study these populations.

An AI scheduling environment for the Hubble Space Telescope

1991 ◽  
Author(s):  
JEFFREY SPONSLER ◽  
MARK JOHNSTON ◽  
GLENN MILLER ◽  
ANTHONY KRUEGER ◽  
MICHAEL LUCKS ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Space Telescope
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