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Author :
Publisher :
ISBN 13 :
Total Pages : 622 pages
Book Rating : 4.:/5 (926 download)
Download or read book Super Star Clusters, Their Environment, and the Formation of Galactic Winds written by and published by . This book was released on 2007 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Santina Michelle Consiglio
Publisher :
ISBN 13 :
Total Pages : 113 pages
Book Rating : 4.:/5 (17 download)
Download or read book Super Star Cluster Formation, Effects, and Evolution in CO with ALMA written by Santina Michelle Consiglio and published by . This book was released on 2018 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Super star clusters (SSCs) are important sources of energy, ionizing photons, and metals in galaxies. With masses of 100,000-1,000,000 M , SSCs have the mass necessary to create O and B stars as well as to form globular clusters. Despite their overall importance, little is known about how SSCs form, evolve, and affect their environments. In my thesis, I use submillimeter tracers of gas and its kinematics from the newly commissioned Atacama Large (Sub)Millimeter Array (ALMA) as well as the Submillimeter Array (SMA) to study SSCs, their associated gas and dust and feedback from young stars in two local dwarf galaxies, NGC 5253 and II Zw 40. In II Zw 40, we find a low gas-to-dust ratio (GTD) of ~70 in a cloud near a SSC, whereas we find GTD>270 in an isolated cloud with no associated star formation
Author : José Franco
Publisher : Cambridge University Press
ISBN 13 : 9780521651318
Total Pages : 304 pages
Book Rating : 4.6/5 (513 download)
Download or read book Interstellar Turbulence written by José Franco and published by Cambridge University Press. This book was released on 1999-05-28 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely volume presents a series of review articles covering every aspect of interstellar turbulence--from accretion disks, molecular clouds, atomic and ionized media, through to spiral galaxies - based on a major international conference held in Mexico City.With advances in observational techniques and the development of more efficient computer codes and faster computers, research in this area has made spectacular progress in recent years. This book provides a comprehensive overview of the most important developments in observing and modelling turbulent flows in the cosmos. It provides graduate student and researchers with a state-of-the-art summary of observational, theoretical and computational research in interstellar turbulence.
Author : Kenneth Janes
Publisher :
ISBN 13 :
Total Pages : 640 pages
Book Rating : 4.:/5 (45 download)
Download or read book The Formation and Evolution of Star Clusters written by Kenneth Janes and published by . This book was released on 1991 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pierre-Emmanuel Aime Marcel Belles
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (855 download)
Download or read book Formation of Stars and Star Clusters in Colliding Galaxies written by Pierre-Emmanuel Aime Marcel Belles and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jordan A. Turner
Publisher :
ISBN 13 :
Total Pages : 113 pages
Book Rating : 4.5/5 (152 download)
Download or read book Probing the Environments of Star Formation Using Star Clusters in Nearby Galaxies written by Jordan A. Turner and published by . This book was released on 2021 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the hierarchical view of star formation, the densest regions of the interstellar medium (ISM) undergo gravitational collapse to form stars. Typically, many stars are formed in tandem to produce a star cluster. In turn, these star clusters are grouped together to form larger associations of clusters and these form together to shape the large-scale galactic structures like spiral arms. Charting the connection between the star formation at small-scales and the large-scale galactic properties is crucial for understanding the evolution of galaxies. We begin this dissertation in Chapter 1 with an introduction to the current understanding of star formation, the cold gas of the ISM, and how the two are related. We also outline the big-picture questions we seek to answer in this dissertation and the tools needed in these studies. In Chapter 2, we discuss the first step in a joint analysis of Hubble Space Telescope (HST) observations and Atacama Large Millimeter/submillimeter Array (ALMA) dust continuum maps. This study aims to correlate the emission from young star clusters with the properties of the observed dust. Chapter 3 sets up the spectral energy distribution modeling effort for the Physics at High Angular Resolutions in Nearby GalaxieS-HST (PHANGS-HST) star cluster data pipeline. This chapter goes into great detail on testing, validating, and characterizing how well we can model the star clusters. This modeling provides estimates of the physical properties of the star clusters which are critical for the analysis presented in Chapter 4. In this study, we utilize the PHANGS-HST star cluster catalogs in 11 nearby galaxies combined with the PHANGS--ALMA giant molecular cloud (GMC) catalogs in order to spatially correlate the star clusters with their natal gas clouds. With this correlation, we constrain the timescale for dissipation of the GMCs after the onset of star formation.
Author : International Astronomical Union. Symposium
Publisher : Cambridge University Press
ISBN 13 : 9780521874724
Total Pages : 616 pages
Book Rating : 4.8/5 (747 download)
Download or read book Massive Stars as Cosmic Engines (IAU S250) written by International Astronomical Union. Symposium and published by Cambridge University Press. This book was released on 2008-07-17 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews our current understanding of the life, evolution and death of massive stars; for researchers and graduate students.
Author : Fernando Rico Villas
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Study of the Early Stages in the Formation of Super Star Clusters written by Fernando Rico Villas and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis aims to study the earliest heavily obscured phases of massive star formation in starburst (SB) galaxies through a multi-line analysis of the HC3N rotational transitions from the ground and vibrationally excited states (HC3N*). Due to its unique spectroscopic properties, we also discuss the potential of HC3N* as a tool to discern whether the obscured nuclei of galaxies are being heated by a SB or by an accreting super massive black hole (i.e. an active galactic nucleus; AGN). Star formation is one of the most relevant physical processes in the formation and evolution of a galaxy. In particular, the energy released back (feedback) to their surrounding interstellar medium (ISM) from massive stars profoundly impacts the galaxy’s evolution. In a SB galaxy, most star formation takes place in the nucleus and in the form of compact massive star clusters known as superstar clusters (SSCs), which represent one of the most extreme models of star formation. Another major source of energy that can profoundly impact the ISM of a galaxy is an AGN. Both massive star formation and the AGN can reduce the star formation efficiency of a galaxy and even halt future star formation through feedback mechanisms. Hence, to study the physical conditions of the gas driving the formation of SSCs and shed light on the formation of massive stars, which is still not well understood, we need to observe the earliest phases of massive star formation before significant feedback intervenes...
Author : Daniel Parke Cohen
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (119 download)
Download or read book Observing the Feedback from Embedded Super Star Clusters with NIRSPEC written by Daniel Parke Cohen and published by . This book was released on 2020 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the birth places of super star clusters (SSCs), starbursts provide a testbed of astrophysics on a vast range of scales, from the microphysics of star formation to the macrophysics describing the evolution of galaxies and ultimately the Universe as a whole. SSCs represent the dominant mode of star formation in the early Universe. In the local Universe, these ~1-10 Myr old systems host dense concentrations of thousands of massive stars, offering an unprecedented view of the likely progenitors of globular clusters. This dissertation investigates the influence of SSCs on the gas that they ionize and subsequent effect of their starbursts on the galaxies in which they form. In particular, I explore the following questions: how does massive star feedback clear natal gas from SSCs? What conditions allow a cluster to remain bound through this gas dispersal phase or form multiple generations of stars? Through what mechanisms do starbursts regulate the central mass evolution of disk galaxies? How do SSCs drive chemically enriched, galaxy-scale winds from starbursts? To study the launching of winds, we need tracers that can penetrate the dusty clouds around young SSCs, and both high spatial and spectral resolution. The Brackett line (4.05 m) is ideal, but not available to most observers. Using NIRSPEC (Keck II) we can map Br and probe the dynamics of heavily embedded HII regions near SSCs. In this thesis, we present NIRSPEC observations in a variety of starburst environments, with the aim of providing an empirical basis for the emerging paradigm in the formation of the most massive stellar systems.
Author : Dong-Woo Kim
Publisher : Springer Science & Business Media
ISBN 13 : 1461405807
Total Pages : 288 pages
Book Rating : 4.4/5 (614 download)
Download or read book Hot Interstellar Matter in Elliptical Galaxies written by Dong-Woo Kim and published by Springer Science & Business Media. This book was released on 2011-10-20 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a number of new discoveries resulting from 10 years of Chandra and XMM-Newton observations and corresponding theoretical works, this is the first book to address significant progress in the research of the Hot Interstellar Matter in Elliptical Galaxies. A fundamental understanding of the physical properties of the hot ISM in elliptical galaxies is critical, because they are directly related to the formation and evolution of elliptical galaxies via star formation episodes, environmental effects such as stripping, infall, and mergers, and the growth of super-massive black holes. Thanks to the outstanding spatial resolution of Chandra and the large collecting area of XMM-Newton, various fine structures of the hot gas have been imaged in detail and key physical quantities have been accurately measured, allowing theoretical interpretations/predictions to be compared and tested against observational results. This book will bring all readers up-to-date on this essential field of research.
Author : Krystal Tyler
Publisher :
ISBN 13 :
Total Pages : 191 pages
Book Rating : 4.:/5 (18 download)
Download or read book Star Formation and Galaxy Evolution in Different Environments, from the Field to Massive Clusters written by Krystal Tyler and published by . This book was released on 2012 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Romas Smilgys
Publisher :
ISBN 13 :
Total Pages : 135 pages
Book Rating : 4.:/5 (13 download)
Download or read book Formation of Stars and Stellar Clusters in Galactic Environment written by Romas Smilgys and published by . This book was released on 2018 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Houjun Mo
Publisher : Cambridge University Press
ISBN 13 : 0521857937
Total Pages : 841 pages
Book Rating : 4.5/5 (218 download)
Download or read book Galaxy Formation and Evolution written by Houjun Mo and published by Cambridge University Press. This book was released on 2010-05-20 with total page 841 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coherent introduction for researchers in astronomy, particle physics, and cosmology on the formation and evolution of galaxies.
Author : Kenneth Janes
Publisher :
ISBN 13 : 9789377073251
Total Pages : 613 pages
Book Rating : 4.0/5 (732 download)
Download or read book The Formation and Evolution of Star Clusters written by Kenneth Janes and published by . This book was released on 1991 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Emil S Noordeh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (126 download)
Download or read book The Evolution of Galaxy Activity in Massive Clusters written by Emil S Noordeh and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The nature of galaxy evolution from the early Universe to the present day is intricately linked to large-scale environment: the environments of galaxies are expected to play a critical role in the development of their morphologies, star formation activity, and the activity of their central Super Massive Black Holes (SMBHs). Large scale environment can strongly and rapidly affect gas reservoirs which are a prerequisite for both star formation and SMBH activity. We would expect the effect of environment to be most pronounced in massive galaxy clusters, where both the density of the intracluster medium and number density of galaxies are the highest. This has indeed been established for star formation activity in the local and intermediate redshift universe, where dense, cluster environments are more likely to host elliptical, quiescent galaxies. However, the impact of the cluster environment on SMBH activity has been significantly less clear. At high redshift, the impact of clusters on galaxy activity is even less well understood. This is due to both a decline in the number of massive clusters at high redshift as well as increasing observational difficulty in reliably identifying and characterizing both the clusters themselves and their member galaxies. This dissertation tries to bring some clarity to these unknowns. First, we present an analysis of SMBH activity in a sample of massive clusters at intermediate redshift where we confirm a dependence of this activity on cluster mass. Second, we describe the spectroscopic characterization of one of the highest redshift galaxy clusters ever discovered, existing at a lookback time of more than 10 billion years. We model the stellar population of its member galaxies and trace their formation back to the cosmic dark ages, when the Universe was only 370 million years old. Finally, we do a deep dive into this cluster's galaxy population and find it to be remarkably similar to that of clusters in the local universe. We identify a tremendously enhanced quiescent fraction relative to the field and find evidence for accelerated size-evolution in these quiescent galaxies.
Author : Jenna Elizabeth Ryon
Publisher :
ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.:/5 (97 download)
Download or read book Characteristics of Young, Massive Star Clusters in Nearby Galaxies written by Jenna Elizabeth Ryon and published by . This book was released on 2016 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Star formation commonly results in the production of star clusters. In recent years, observations with the Hubble Space Telescope have led to the discovery of young, massive star clusters in nearby galaxies, constituting a new class that may bridge the gap between open and globular clusters. In this thesis, I present observational studies focused on understanding the properties of young, massive cluster (YMC) populations across a range of galactic environments. Using multiwavelength HST data from the Snapshot Hubble U-band Cluster Survey, I select a high-confidence sample of YMCs in the spiral galaxy NGC 2997 and perform photometry. I characterize the physical properties of the YMC population, including determining the luminosity and mass functions, age distribution, and efficiency of cluster formation. This work helps to establish that in relatively quiescent spiral galaxies, YMCs tend to form with efficiencies of ~10%, and can survive for at least a few hundred Myr. I then present a study of star formation associated with giant gas filaments surrounding NGC 1275, the central galaxy in the Perseus galaxy cluster. I identify a population of YMCs embedded in "streaks" of stars using far-ultraviolet and optical data from HST. These objects may form when the galactic-scale gas filaments slow their expansion and become gravitationally unstable in the outer regions of the galaxy. This work shows that cluster formation can proceed relatively normally in unusual environments, and may form isolated clusters in the outskirts of galaxies. Finally, I focus on the structural properties of YMC populations in two studies. In the first, I measure the effective (half-light) radii, core radii, and light profiles of ~200 YMCs in seven adjacent HST fields on the spiral galaxy M83. In the second, I build upon the findings in the first using YMC samples from two spiral galaxies in the Legacy Extragalactic UV Survey, NGC 628 and NGC 1313. These studies imply that YMCs emerge from early evolution with similar radii, typically 2-3 pc, and are not strongly affected by their local environment.
Author : Victor Andersen
Publisher :
ISBN 13 :
Total Pages : 430 pages
Book Rating : 4.:/5 (414 download)
Download or read book A Search for Environmentally Driven Star Formation in Nearby Galaxy Clusters written by Victor Andersen and published by . This book was released on 1998 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
