Dark Matter, Dark Energy, and the Fate of the Universe
... Dark Matter in the Milky Way In Chapter 15, we saw how the Sun’s motion around the galaxy reveals the total amount of mass within its orbit. We can similarly use the orbital motion of any other star around the galaxy to measure the mass of the Milky Way within that star’s orbit. In principle, we co ...
... Dark Matter in the Milky Way In Chapter 15, we saw how the Sun’s motion around the galaxy reveals the total amount of mass within its orbit. We can similarly use the orbital motion of any other star around the galaxy to measure the mass of the Milky Way within that star’s orbit. In principle, we co ...
Collaborations with East Asian VLBI stations
... 4 others from VLBA • Pitch angle of Perseus arm 16 +/- 3 deg four arm spiral ? ...
... 4 others from VLBA • Pitch angle of Perseus arm 16 +/- 3 deg four arm spiral ? ...
SPICA Yellow Book
... the low excitation/ionisation tracers measuring the star formation component in galaxies, the mid-IR contains important diagnostic lines that can reveal the presence of Active Galactic Nuclei (AGN), such as emission from [Ne ] and [O ]. Figure 1.2 (right panel) shows the mid- and far-IR lines fro ...
... the low excitation/ionisation tracers measuring the star formation component in galaxies, the mid-IR contains important diagnostic lines that can reveal the presence of Active Galactic Nuclei (AGN), such as emission from [Ne ] and [O ]. Figure 1.2 (right panel) shows the mid- and far-IR lines fro ...
2 Justification and benefits in joining TMT
... Astronomy is the oldest science where curiosities have driven its advancement since the beginning of the mankind. Every man has asked the question: How did the universe begin? Are we alone in the universe? Astonishingly, astronomers are now on the verge of answering these fundamental questions with ...
... Astronomy is the oldest science where curiosities have driven its advancement since the beginning of the mankind. Every man has asked the question: How did the universe begin? Are we alone in the universe? Astonishingly, astronomers are now on the verge of answering these fundamental questions with ...
environmental effects on galaxy evolution in nearby clusters
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
ULXs: General Properties and Variability - X
... luminous photo-ionized nebulae around them- require high luminosity to photoionize them •Quite a few have “soft” components well fit by low kT black body- consistent with high mass (Miller this meeting). ...
... luminous photo-ionized nebulae around them- require high luminosity to photoionize them •Quite a few have “soft” components well fit by low kT black body- consistent with high mass (Miller this meeting). ...
Science Case for the Chinese Participation of TMT
... Astronomy is the oldest science where curiosities have driven its advancement since the beginning of the mankind. Every man has asked the question: How did the universe begin? Are we alone in the universe? Astonishingly, astronomers are now on the verge of answering these fundamental questions with ...
... Astronomy is the oldest science where curiosities have driven its advancement since the beginning of the mankind. Every man has asked the question: How did the universe begin? Are we alone in the universe? Astonishingly, astronomers are now on the verge of answering these fundamental questions with ...
Lecture 2 Astronomical Distances
... Type Ia -- white dwarf in a binary system accretes mass, collapses when MWD = 1.4 MSUN. Good “standard bombs”. AS 4022 ...
... Type Ia -- white dwarf in a binary system accretes mass, collapses when MWD = 1.4 MSUN. Good “standard bombs”. AS 4022 ...
Star Clusters in Mergers
... their distance), hence only slightly fainter. Statistics not different physics. ...
... their distance), hence only slightly fainter. Statistics not different physics. ...
T3-Cosmic Star Formation History
... The origin and evolution of galaxies are among the most intriguing and complex chapters in the formation of cosmic structure, and observations in this field have accumulated at an astonishing pace. Multiwavelength imaging surveys with the Hubble (HST) and Spitzer space telescopes and ground-based fac ...
... The origin and evolution of galaxies are among the most intriguing and complex chapters in the formation of cosmic structure, and observations in this field have accumulated at an astonishing pace. Multiwavelength imaging surveys with the Hubble (HST) and Spitzer space telescopes and ground-based fac ...
Niraj D. Welikala Thesis - D-Scholarship@Pitt
... stars in the Milky Way have highly elliptical orbits which are characteristic of a system in free fall. They inferred that the Galaxy formed quickly through the collapse of a uniform, isolated protogalactic cloud. In 1978, this model was challenged by Searle and Zinn (1978) who analyzed globular clu ...
... stars in the Milky Way have highly elliptical orbits which are characteristic of a system in free fall. They inferred that the Galaxy formed quickly through the collapse of a uniform, isolated protogalactic cloud. In 1978, this model was challenged by Searle and Zinn (1978) who analyzed globular clu ...
IRAM Annual Report 2012
... way to a future facility continuum instrument. The PdBI Interferometer has produced a wide range of top-level science results ranging from very exiting investigations on galactic low mass star formation to observations in the distant universe with deep impact on the understanding of how galaxies for ...
... way to a future facility continuum instrument. The PdBI Interferometer has produced a wide range of top-level science results ranging from very exiting investigations on galactic low mass star formation to observations in the distant universe with deep impact on the understanding of how galaxies for ...
book_text4
... for many years. As early as 1923, the famed German rocket scientist Hermann Oberth suggested a space-based telescope. However, it was decades before technology caught up with the dream. The American astronomer Lyman Spitzer proposed a more realistic plan for a space telescope in 1946. From a positio ...
... for many years. As early as 1923, the famed German rocket scientist Hermann Oberth suggested a space-based telescope. However, it was decades before technology caught up with the dream. The American astronomer Lyman Spitzer proposed a more realistic plan for a space telescope in 1946. From a positio ...
Ch. 20 - Astro1010
... Once all the Galaxy is within an orbit, the Orbital Velocity should diminish with distance, as the dashed curve shows. It doesn’t; more than twice the mass of the Galaxy would have to be outside the visible part to reproduce the observed curve. This mass is called Dark Matter ...
... Once all the Galaxy is within an orbit, the Orbital Velocity should diminish with distance, as the dashed curve shows. It doesn’t; more than twice the mass of the Galaxy would have to be outside the visible part to reproduce the observed curve. This mass is called Dark Matter ...
... Sellwood & Debattista 1996; Buta 1995, 1999, 2000; Athanassoula 2002; and especially Sellwood & Wilkinson 1993 and Buta & Combes 1996). Discussions of pseudobulge formation include, besides the above, Pfenniger & Norman (1990); Courteau (1996b); Carollo, Ferguson & Wyse (1999); Balcells et al. (2003 ...
1 The Hubble Story (10:56)
... the lives of stars. These are crucial data that allow us to extend our understanding of the Milky Way galaxy to other galaxies. Hubble uses its exceptionally sharp focus to reveal changes on cosmic scales over periods of only a few years. From the ground it is not possible to see such evolution taki ...
... the lives of stars. These are crucial data that allow us to extend our understanding of the Milky Way galaxy to other galaxies. Hubble uses its exceptionally sharp focus to reveal changes on cosmic scales over periods of only a few years. From the ground it is not possible to see such evolution taki ...
The visibility of Lyman Alpha Emitters: constraining reionization
... number of physical effects. First, the intrinsic Lyα luminosity depends on the total number of H I ionizing photons that are produced by a galaxy, depending on the star formation rate (SFR), age and metallicity of its stellar population (e.g. Santos 2004). Second, depending on the H I and dust conte ...
... number of physical effects. First, the intrinsic Lyα luminosity depends on the total number of H I ionizing photons that are produced by a galaxy, depending on the star formation rate (SFR), age and metallicity of its stellar population (e.g. Santos 2004). Second, depending on the H I and dust conte ...
AST1100 Lecture Notes
... You will encounter the Hertzsprung-Russell (HR) diagram on several occations during this course. Here you will only get a short introduction and just enough information in order to be able to use it for the estimation of distances. In the lectures on stellar evolution, you will get more details. The ...
... You will encounter the Hertzsprung-Russell (HR) diagram on several occations during this course. Here you will only get a short introduction and just enough information in order to be able to use it for the estimation of distances. In the lectures on stellar evolution, you will get more details. The ...
The most metal-poor galaxies
... of a galaxy requires some words of caution because in a given galaxy, depending on where one looks, this quantity may vary substantially. For example in our Galaxy, the bulge, the solar neighbourhood and the halo differ in metallicity. The most metal-poor halo stars have heavy element abundances 10 ...
... of a galaxy requires some words of caution because in a given galaxy, depending on where one looks, this quantity may vary substantially. For example in our Galaxy, the bulge, the solar neighbourhood and the halo differ in metallicity. The most metal-poor halo stars have heavy element abundances 10 ...
IRAM Annual Report 2011
... have decided to prolong their fruitful collaboration within IRAM up to at least 2024 and at the same time gave green light for the first and most important phase of the NOEMA project with the related financial support. With these decisions the IRAM associates have laid out a solid basis for the futu ...
... have decided to prolong their fruitful collaboration within IRAM up to at least 2024 and at the same time gave green light for the first and most important phase of the NOEMA project with the related financial support. With these decisions the IRAM associates have laid out a solid basis for the futu ...
ASTRONOMIA SPAIN inglés.qxd
... These are some of the results we present in ‘Astronomy made in Spain’, a project of the Spanish Astronomical Society (Sociedad Española de Astronomía, SEA) to commemorate the International Year of Astronomy 2009. This book is a collection of conversations with the Spanish astronomers who have publis ...
... These are some of the results we present in ‘Astronomy made in Spain’, a project of the Spanish Astronomical Society (Sociedad Española de Astronomía, SEA) to commemorate the International Year of Astronomy 2009. This book is a collection of conversations with the Spanish astronomers who have publis ...
Star formation in a galactic outflow
... adimensional ionization parameter U) much lower than typically observed in star-forming galaxies. Yet, despite the gas density in the outflow (~600-1,500 cm-3, as inferred from the [SII] doublet) being higher than in the host galaxy and than that typically seen in star-forming galaxies, the ionizati ...
... adimensional ionization parameter U) much lower than typically observed in star-forming galaxies. Yet, despite the gas density in the outflow (~600-1,500 cm-3, as inferred from the [SII] doublet) being higher than in the host galaxy and than that typically seen in star-forming galaxies, the ionizati ...
ROSAT Ian R. Stevens* and David K. Strickland*
... superimposed on the Digitized Sky Survey image. The X-ray contours are from the longer 6.2-ks observation only. As noted by Turner et al. (1993), there are several point sources in the vicinity of the nucleus of NGC 1365. In addition to a strong central point source there is also low-surface-brightn ...
... superimposed on the Digitized Sky Survey image. The X-ray contours are from the longer 6.2-ks observation only. As noted by Turner et al. (1993), there are several point sources in the vicinity of the nucleus of NGC 1365. In addition to a strong central point source there is also low-surface-brightn ...
Electronic version
... highest resolution in radio astronomy. In all these facilities many foreign colleagues have been able to participate, and it is this cooperative spirit that makes us so pleased to have this Assembly here in Kyoto, where already in early days high culture included scientific elements. Astronomy world ...
... highest resolution in radio astronomy. In all these facilities many foreign colleagues have been able to participate, and it is this cooperative spirit that makes us so pleased to have this Assembly here in Kyoto, where already in early days high culture included scientific elements. Astronomy world ...
The size and shape of the Milky Way disc and halo from M
... we will include them in this paper. Brown dwarfs are believed to be among the most numerous luminous objects in our Milky Way. Studying them can thus tell us a lot about the structure of the Milky Way. Brown dwarfs resemble high-redshift galaxies in both colour and angular size. For example, redshif ...
... we will include them in this paper. Brown dwarfs are believed to be among the most numerous luminous objects in our Milky Way. Studying them can thus tell us a lot about the structure of the Milky Way. Brown dwarfs resemble high-redshift galaxies in both colour and angular size. For example, redshif ...
Galaxy Zoo
Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the morphological classification of large numbers of galaxies. (e.g.) It is an example of citizen science as it enlists the help of members of the public to help in scientific research. There have been seven versions up to July 2014, which are outlined in this article. Galaxy Zoo is part of the Zooniverse, a group of citizen science projects.