scholarly journals A differential RR lyrae line-of-sight distance between M31 and M33

2021 ◽  
Author(s):  
Ata Sarajedini
Keyword(s):  
Hubble Space Telescope ◽  
Line Of Sight ◽  
Distance Modulus ◽  
Absolute Distance ◽  
Space Telescope ◽  
Rr Lyrae ◽  
Sight Distance ◽  
Metal Abundance ◽  
Photometric Scale ◽  
Advanced Camera For Surveys

Abstract We present a purely differential line-of-sight distance between M31 and M33 using ab-type RR Lyrae variables observed in each galaxy by the Hubble Space Telescope Advanced Camera for Surveys in the F606W filter. Using 1481 RR Lyraes in 13 M31 fields and 181 RR Lyraes in 6 M33 fields, and placing all of these stars on a uniform photometric scale with internally consistent corrections for metal abundance and extinction, we find a relative absolute distance modulus of Δ(m-M)o = –0.298 ± 0.016 in the sense of (m-M)o, M31 – (m-M)o, M33. Adopting an absolute distance modulus of (m-M)o=24.46±0.10 for M31 places M33 115 kpc beyond M31 in line-of-sight distance.

scholarly journals The COSMOS Survey: Hubble Space Telescope Advanced Camera for Surveys Observations and Data Processing

2007 ◽  
Vol 172 (1) ◽  
pp. 196-202 ◽  
Author(s):  
A. M. Koekemoer ◽  
H. Aussel ◽  
D. Calzetti ◽  
P. Capak ◽  
M. Giavalisco ◽  
...  
Keyword(s):  
Data Processing ◽  
Hubble Space Telescope ◽  
Space Telescope ◽  
Advanced Camera For Surveys

scholarly journals THE GHOSTS SURVEY. I. HUBBLE SPACE TELESCOPE ADVANCED CAMERA FOR SURVEYS DATA

2011 ◽  
Vol 195 (2) ◽  
pp. 18 ◽  
Author(s):  
D. J. Radburn-Smith ◽  
R. S. de Jong ◽  
A. C. Seth ◽  
J. Bailin ◽  
E. F. Bell ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Space Telescope ◽  
Advanced Camera For Surveys

scholarly journals Planet Detection using the Advanced Camera for Surveys on the Hubble Space Telescope

2004 ◽  
Vol 213 ◽  
pp. 107-110
Author(s):  
William B. Sparks ◽  
John Krist ◽  
Mark Clampin ◽  
Holland Ford
Keyword(s):  
Hubble Space Telescope ◽  
Photometric Measurement ◽  
Direct Imaging ◽  
Planet Detection ◽  
Space Telescope ◽  
Advanced Camera For Surveys

The Advanced Camera for Surveys was installed on the Hubble Space Telescope in March 2002. The instrument science team will search for planets using direct imaging with the ACS coronagraph and with precise astrometric and photometric measurement of suitable stars and disks. The camera is operational and performing to expectation.

scholarly journals Extreme Globular Cluster Systems

2005 ◽  
Vol 13 ◽  
pp. 171-172
Author(s):  
John P. Blakeslee
Keyword(s):  
Globular Cluster ◽  
Hubble Space Telescope ◽  
Large Format ◽  
Cluster Systems ◽  
Space Telescope ◽  
The Core ◽  
Early Results ◽  
Advanced Camera For Surveys

AbstractThe superior resolution and large format of the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST) make it a powerful new tool in the study of extra-galactic globular cluster (GC) systems. We summarize some early results on GC populations from the ACS GTO program, concentrating on the extreme cases of the isolated dwarf NGC 2915 and the core of the massive lensing cluster Abell 1689.

scholarly journals Identification of Type Ia Supernovae at Redshift 1.3 and Beyond with the Advanced Camera for Surveys on the Hubble Space Telescope

2004 ◽  
Vol 600 (2) ◽  
pp. L163-L166 ◽  
Author(s):  
Adam G. Riess ◽  
Louis-Gregory Strolger ◽  
John Tonry ◽  
Zlatan Tsvetanov ◽  
Stefano Casertano ◽  
...  
Keyword(s):  
Hubble Space Telescope ◽  
Type Ia Supernovae ◽  
Space Telescope ◽  
Type Ia ◽  
Advanced Camera For Surveys ◽  
Ia Supernovae

scholarly journals Bulge K and M giants

1993 ◽  
Vol 153 ◽  
pp. 87-100
Author(s):  
Donald M. Terndrup
Keyword(s):  
Velocity Dispersion ◽  
Line Of Sight ◽  
Rotating System ◽  
Rr Lyrae ◽  
Global Properties ◽  
Metal Abundance ◽  
The Mean ◽  
M Stars ◽  
K Giants

Several independent studies of the abundances and kinematics of K and M giants in the inner Galaxy (R < 2 kpc) are assembled to trace out this region's global properties. The mean metal abundance is [M/H] ≈ +0.3 at R = 0.5 kpc, and declines by about 1.2 dex out to R = 2 kpc. The line-of-sight velocity dispersion at R = 0.5 kpc is σr ≈ 115 km sec—1 for all population tracers, and declines by d log σr/d log R = —0.4. It now seems fairly clear that only the most metal-poor K giants become RR Lyrae variables, while the more metal-rich ones become late M stars. There is some evidence that the most metal-rich stars are in a flatter, more rapidly rotating system. Metal abundance ratios for a few K giants suggest that the inner Galaxy may have formed rapidly.

Line-of-sight jitter of the Hubble Space Telescope

1993 ◽  
Author(s):  
Pierre Y. Bely ◽  
Olivia L. Lupie ◽  
John L. Hershey
Keyword(s):  
Hubble Space Telescope ◽  
Line Of Sight ◽  
Space Telescope

scholarly journals M32: Is there an Ancient and Metal-poor Stellar Population?

2009 ◽  
Vol 5 (S262) ◽  
pp. 333-334
Author(s):  
Giuliana Fiorentino ◽  
Antonela Monachesi ◽  
Scott C. Trager ◽  
Tod R. Lauer ◽  
Abhijit Saha ◽  
...  
Keyword(s):  
Time Series ◽  
Stellar Population ◽  
Hubble Space Telescope ◽  
Variable Stars ◽  
Optical Data ◽  
Ancient Population ◽  
Space Telescope ◽  
Rr Lyrae ◽  
Short Period ◽  
Magnitude Diagram

AbstractWe observed two fields near M32 with the ACS/HRC (Program GO-10572, PI: T. Lauer) on board the Hubble Space Telescope, located at distances of about 1.8' and 5.4' (hereafter F1 and F2, respectively) from the center of M32. To obtain a very detailed and deep color-magnitude diagram (CMD) and to look for short period variability, we obtained time-series imaging of each field in 32-orbit-long exposures using the F435W (B) and F555W (V) filters, spanning a temporal range of 2 days per filter. We focus on our detection of variability on RR Lyrae variable stars, which represents the only way to obtain information about the presence of a very old population (larger than 10 Gyr) in M32 from optical data. Here we present results obtained from the detection of 31 RR Lyrae in these fields: 17 in F1 and 14 in F2. We claim we detected 7+4−3 RR Lyrae variables belonging to M32 in F1 thus indicating the presence of a metal-poor ancient population in M32.

Sign in / Sign up

Export Citation Format

Share Document