Hubble Space Telescope spectroscopy of massive hot stars in the Magellanic Clouds and M31

1994 ◽  
Vol 66 (1-4) ◽  
pp. 179-182 ◽  
Author(s):  
S. M. Haser ◽  
D. J. Lennon ◽  
R. -P. Kudritzki ◽  
J. Puls ◽  
N. R. Walborn ◽  
...  
1994 ◽  
pp. 179-182
Author(s):  
S. M. Haser ◽  
D. J. Lennon ◽  
R.-P. Kudritzki ◽  
J. Puls ◽  
N. R. Walborn ◽  
...  

1996 ◽  
Vol 112 ◽  
pp. 2350
Author(s):  
Jon A. Morse ◽  
William P. Blair ◽  
Michael A. Dopita ◽  
John P. Hughes ◽  
Robert P. Kirshner ◽  
...  

2020 ◽  
Vol 500 (1) ◽  
pp. 817-837
Author(s):  
Abigail H Chown ◽  
Victoria Scowcroft ◽  
Stijn Wuyts

ABSTRACT The Cepheid Leavitt Law (LL), also known as the Period–Luminosity relation, is a crucial tool for assembling the cosmic distance ladder. By combining data from the OGLE-IV catalogue with mid-infrared photometry from the Spitzer Space Telescope, we have determined the 3.6 and 4.5 $\mu$m LLs for the Magellanic Clouds using ∼5000 fundamental-mode classical Cepheids. Mean magnitudes were determined using a Monte Carlo Markov Chain (MCMC) template fitting procedure, with template light curves constructed from a subsample of these Cepheids with fully phased, well-sampled light curves. The dependence of the Large Magellanic Cloud LL coefficients on various period cuts was tested, in addition to the linearity of the relationship. The zero-point of the LL was calibrated using the parallaxes of Milky Way Cepheids from the Hubble Space Telescope and Gaia Data Release 2. Our final calibrated relations are M[3.6] = −3.246(±0.008)(log (P) − 1.0) − 5.784(±0.030) and M[4.5] = −3.162(±0.008)(log (P) − 1.0) − 5.751(±0.030).


1997 ◽  
pp. 417-427 ◽  
Author(s):  
M. A. Dopita ◽  
P. R. Wood ◽  
S. J. Meatheringham ◽  
E. Vassiliadis ◽  
R. C. Bohlin ◽  
...  

1993 ◽  
Vol 418 ◽  
pp. 804 ◽  
Author(s):  
Michael A. Dopita ◽  
Holland C. Ford ◽  
Ralph Bohlin ◽  
Ian N. Evans ◽  
Stephen J. Meatheringham

1996 ◽  
Vol 460 ◽  
pp. 320 ◽  
Author(s):  
M. A. Dopita ◽  
E. Vassiliadis ◽  
S. J. Meatheringham ◽  
R. C. Bohlin ◽  
H. C. Ford ◽  
...  

2007 ◽  
Vol 3 (S246) ◽  
pp. 61-62
Author(s):  
Dimitrios A. Gouliermis

AbstractThe Large and Small Magellanic Cloud (LMC, SMC) offer an outstanding variety of young stellar associations, in which large samples of low-mass stars (withM≤ 1 M⊙) currently in the act of formation can be resolved and explored sufficiently with theHubble Space Telescope. Previous observations with theWide-Field Planetary Camera 2(WFPC2) provided the first evidence of the existence of low-mass pre-main sequence (PMS) stars in the vicinity of star forming associations in the Magellanic Clouds (MCs) (Gouliermiset al. 2006a), and recent results from deeper observations with theAdvanced Camera for Surveys(ACS) enhanced dramatically the picture of these systems with the discovery of large numbers of PMS stars. The associations LH 95 (Gouliermiset al. 2002, 2007a) in the LMC, and NGC 346 (Gouliermiset al. 2006b) and NGC 602 (Gouliermiset al. 2007b) in the SMC, are currently under investigation with the use of observations from bothHubbleandSpitzer Space Telescope. I present the impact of our recent results in terms of the star formation history and Initial Mass Function (IMF) of these interesting systems, using as example the case of NGC 602.


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