scholarly journals B-supergiants in IC1613: testing low-Z massive star physics and evolution

2016 ◽  
Vol 12 (S329) ◽  
pp. 389-389
Author(s):  
Inés Camacho ◽  
Miriam García ◽  
Miguel A. Urbaneja ◽  
Artemio Herrero
Keyword(s):  
Massive Star ◽  
Local Group ◽  
Uv Spectroscopy ◽  
Physical Parameters ◽  
Physical Processes ◽  
Life And Death ◽  
The Galaxy ◽  
Nearby Galaxies ◽  
Group Galaxy ◽  
Local Group Galaxy

AbstractThe physical processes taking place in massive stars during their life and death are highly dependent on the metallicity (Z) of their parent cloud. Observations of these stars in low-Z nearby galaxies are crucial to understand these processes. IC1613 is the nearest Local Group galaxy with ongoing star formation and O-abundance lower than the SMC, although UV spectroscopy suggests it is not so metal poor. We performed a spectral analysis of early B-type stars in the galaxy, obtaining physical parameters and abundances. Our results confirm the low O-abundance of IC1613.

New Cepheid distances to nearby galaxies based on BVRI CCD photometry. II - The local group galaxy M33

1991 ◽  
Vol 372 ◽  
pp. 455 ◽  
Author(s):  
Wendy L. Freedman ◽  
Christine D. Wilson ◽  
Barry F. Madore
Keyword(s):  
Local Group ◽  
Ccd Photometry ◽  
Nearby Galaxies ◽  
Group Galaxy ◽  
Local Group Galaxy

UGC-A86 - A local group galaxy candidate

1991 ◽  
Vol 101 ◽  
pp. 465 ◽  
Author(s):  
A. Saha ◽  
John G. Hoessel
Keyword(s):  
Local Group ◽  
Group Galaxy ◽  
Local Group Galaxy

Is LGS 2 a Local Group galaxy

1981 ◽  
Vol 93 ◽  
pp. 35 ◽  
Author(s):  
S. van den Bergh ◽  
R. Racine
Keyword(s):  
Local Group ◽  
Group Galaxy ◽  
Local Group Galaxy

scholarly journals Interactions and star formation

2015 ◽  
Vol 11 (S315) ◽  
pp. 236-239
Author(s):  
Johan H. Knapen ◽  
Mauricio Cisternas ◽  
Miguel Querejeta
Keyword(s):  
Star Formation ◽  
Massive Star ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Morphological Type ◽  
Stellar Mass ◽  
Interacting Galaxies ◽  
The Galaxy ◽  
Nearby Galaxies ◽  
Ir Emission

AbstractWe investigate the influence of interactions on the star formation by studying a sample of almost 1500 of the nearest galaxies, all within a distance of ~45 Mpc. We define the massive star formation rate (SFR), as measured from far-IR emission, and the specific star formation rate (SSFR), which is the former quantity normalized by the stellar mass of the galaxy, and explore their distribution with morphological type and with stellar mass. We then calculate the relative enhancement of these quantities for each galaxy by normalizing them by the median SFR and SSFR values of individual control populations of similar non-interacting galaxies. We find that both SFR and SSFR are enhanced in interacting galaxies, and more so as the degree of interaction is higher. The increase is, however, moderate, reaching a maximum of a factor of 1.9 for the highest degree of interaction (mergers). The SFR and SSFR are enhanced statistically in the population, but in most individual interacting galaxies they are not enhanced at all. We discuss how those galaxies with the largest SFR and/or SSFR enhancement can be defined as starbursts. We argue that this study, based on a representative sample of nearby galaxies, should be used to place constraints on studies based on samples of galaxies at larger distances.

scholarly journals Spectroscopic study of formation, evolution and interaction of M31 and M33 with star clusters

2014 ◽  
Vol 10 (S312) ◽  
pp. 201-202 ◽  
Author(s):  
Zhou Fan ◽  
Yanbin Yang
Keyword(s):  
Globular Clusters ◽  
Stellar Population ◽  
Local Group ◽  
Spiral Galaxies ◽  
Star Clusters ◽  
Star Cluster ◽  
Physical Parameters ◽  
Cluster Systems ◽  
Nearby Galaxies ◽  
Formation And Evolution

AbstractThe recent studies show that the formation and evolution process of the nearby galaxies are still unclear. By using the Canada France Hawaii Telescope (CFHT) 3.6m telescope, the PanDAS shows complicated substructures (dwarf satellite galaxies, halo globular clusters, extended clusters, star streams, etc.) in the halo of M31 to ~150 kpc from the center of galaxy and M31-M33 interaction has been studied. In our work, we would like to investigate formation, evolution and interaction of M31 and M33, which are the nearest two spiral galaxies in Local Group. The star cluster systems of the two galaxies are good tracers to study the dynamics of the substructures and the interaction. Since 2010, the Xinglong 2.16m, Lijiang 2.4m and MMT 6.5m telescopes have been used for our spectroscopic observations. The radial velocities and Lick absorption-line indices can thus be measured with the spectroscopy and then ages, metallicities and masses of the star clusters can be fitted with the simple stellar population models. These parameters could be used as the input physical parameters for numerical simulations of M31-M33 interaction.

XMM-Newton survey of the Local Group galaxy M 33 – catalogue results and global properties

2005 ◽  
Vol 1 (S230) ◽  
pp. 160-161
Author(s):  
Z. Misanovic ◽  
W. Pietsch ◽  
F. Haberl ◽  
M. Ehle ◽  
D. Hatzidimitriou ◽  
...  
Keyword(s):  
Local Group ◽  
Global Properties ◽  
Group Galaxy ◽  
Local Group Galaxy

scholarly journals XMM-Newton survey of the Local Group galaxy M 33

2004 ◽  
Vol 426 (1) ◽  
pp. 11-24 ◽  
Author(s):  
W. Pietsch ◽  
Z. Misanovic ◽  
F. Haberl ◽  
D. Hatzidimitriou ◽  
M. Ehle ◽  
...  
Keyword(s):  
Local Group ◽  
Group Galaxy ◽  
Local Group Galaxy

scholarly journals Chemical and Photometric Evolution of the Local Group Galaxy NGC 6822 in a Cosmological Context

2006 ◽  
Vol 644 (2) ◽  
pp. 924-939 ◽  
Author(s):  
Leticia Carigi ◽  
Pedro Colin ◽  
Manuel Peimbert
Keyword(s):  
Local Group ◽  
Cosmological Context ◽  
Ngc 6822 ◽  
Group Galaxy ◽  
Local Group Galaxy
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