Gamma-Ray Bursts and Puzzles of Core
... decrease of amount of measured spectroscopic z after z ≈ 1.2; the z values of host galaxies are mainly obtained by spectra of brighter galaxies. With regard to these effects, the R distribution of z for GRB host galaxies well follows the Hubble course for all other “normal” (non-peculiar) galaxies o ...
... decrease of amount of measured spectroscopic z after z ≈ 1.2; the z values of host galaxies are mainly obtained by spectra of brighter galaxies. With regard to these effects, the R distribution of z for GRB host galaxies well follows the Hubble course for all other “normal” (non-peculiar) galaxies o ...
Markov Chain Monte Carlo Modeling of High-Redshift Quasar
... and collisionally heated, and the radiation emitted can outshine the combined light of all the stars in the host galaxy. Studies of quasar host galaxies at ultraviolet to near-infrared wavelengths are fundamentally limited by the precision with which the light from the central quasar accretion can b ...
... and collisionally heated, and the radiation emitted can outshine the combined light of all the stars in the host galaxy. Studies of quasar host galaxies at ultraviolet to near-infrared wavelengths are fundamentally limited by the precision with which the light from the central quasar accretion can b ...
IRAM Annual Report 2012
... and NIKA, the two prototype continuum arrays now produce unique science and pave the technological 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 formatio ...
... and NIKA, the two prototype continuum arrays now produce unique science and pave the technological 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 formatio ...
ALMA - ESO
... Herschel will sample the regime where most of the luminosity is radiated High resolution images with ALMA allow a better determination of the size of emission sources ALMA would provide high resolution images to refine models. Separate star formation and accretion in AGN’s ...
... Herschel will sample the regime where most of the luminosity is radiated High resolution images with ALMA allow a better determination of the size of emission sources ALMA would provide high resolution images to refine models. Separate star formation and accretion in AGN’s ...
The science case for - Astrophysics
... cold dark matter scenario. Snapshots are shown at various times from the early Universe (z=50) to the present day (z=0). Primary science cases for a 50metre-100metre Extremely Large Telescope Are there terrestrial planets orbiting other stars? Are we alone? Direct detection of earth-like planets in ...
... cold dark matter scenario. Snapshots are shown at various times from the early Universe (z=50) to the present day (z=0). Primary science cases for a 50metre-100metre Extremely Large Telescope Are there terrestrial planets orbiting other stars? Are we alone? Direct detection of earth-like planets in ...
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 ...
Infrared Properties of Star-Forming Dwarf Galaxies. I. Dwarf Irregular
... from the literature are homogenized to a common distance scale, used throughout the paper, and presented in the Appendix. Conclusions are presented in x 9. 2. THE SAMPLE In previous studies of dwarf galaxies in the field (Lee et al. 2003b; Richer & McCall 1995), samples were defined based on two cri ...
... from the literature are homogenized to a common distance scale, used throughout the paper, and presented in the Appendix. Conclusions are presented in x 9. 2. THE SAMPLE In previous studies of dwarf galaxies in the field (Lee et al. 2003b; Richer & McCall 1995), samples were defined based on two cri ...
Confirmation of Hostless Type Ia Supernovae Using Hubble Space
... above results are based on αd = −1.0, which is true for field galaxies (Blanton et al. 2003), but αd may be higher in rich galaxy clusters (e.g., Milne et al. 2007). Adopting αd = −1.5 as an upper limit, the MENeaCS survey estimated that . 2% of the stellar mass in dwarf cluster galaxies below dete ...
... above results are based on αd = −1.0, which is true for field galaxies (Blanton et al. 2003), but αd may be higher in rich galaxy clusters (e.g., Milne et al. 2007). Adopting αd = −1.5 as an upper limit, the MENeaCS survey estimated that . 2% of the stellar mass in dwarf cluster galaxies below dete ...
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 ...
SPICA Yellow Book
... ionisation potential. Using ratios between lines with different ionisation or critical densities, we can trace out a wide range of different physical-excitation conditions (Spinoglio & Malkan 1992). ...
... ionisation potential. Using ratios between lines with different ionisation or critical densities, we can trace out a wide range of different physical-excitation conditions (Spinoglio & Malkan 1992). ...
ROSAT Ian R. Stevens* and David K. Strickland*
... We note that the detection of a broad He II l4686 feature can be difficult even with high signal-to-noise ratio (S/N) data. This does mean that our sample of WR galaxies will tend to be rather heterogenous. Future studies will have to focus on broader samples of starburst galaxies and starburst regi ...
... We note that the detection of a broad He II l4686 feature can be difficult even with high signal-to-noise ratio (S/N) data. This does mean that our sample of WR galaxies will tend to be rather heterogenous. Future studies will have to focus on broader samples of starburst galaxies and starburst regi ...
Variations in the Star Formation Efficiency of the Dense Molecular
... We present a new survey of HCN (1–0) emission, a tracer of dense molecular gas, focused on the littleexplored regime of normal star-forming galaxy disks. Combining HCN, CO, and infrared (IR) emission, we investigate the role of dense gas in star formation, finding systematic variations in both the a ...
... We present a new survey of HCN (1–0) emission, a tracer of dense molecular gas, focused on the littleexplored regime of normal star-forming galaxy disks. Combining HCN, CO, and infrared (IR) emission, we investigate the role of dense gas in star formation, finding systematic variations in both the a ...
Chapter 10 Formation and evolution of the Local Group
... Kahn and Woltjer (1959) determined the mass of the LG from a method called “Local Group Timing”. Using Keplers’ 3rd law and the conservation of energy, they find a dynamical mass at least 4 times larger than the individual masses of the Galaxy and M 31. The authors then made a case for the existence ...
... Kahn and Woltjer (1959) determined the mass of the LG from a method called “Local Group Timing”. Using Keplers’ 3rd law and the conservation of energy, they find a dynamical mass at least 4 times larger than the individual masses of the Galaxy and M 31. The authors then made a case for the existence ...
T3-Cosmic Star Formation History
... galaxies onto a cosmic timeline. Spitzer, Herschel, and submillimeter telescopes have revealed that dusty galaxies with star-formation rates (SFRs) of order 100 M year−1 or more were abundant when the Universe was only 2–3 Gyr old (Barger et al. 1998, Daddi et al. 2005, Gruppioni et al. 2013). Deep ...
... galaxies onto a cosmic timeline. Spitzer, Herschel, and submillimeter telescopes have revealed that dusty galaxies with star-formation rates (SFRs) of order 100 M year−1 or more were abundant when the Universe was only 2–3 Gyr old (Barger et al. 1998, Daddi et al. 2005, Gruppioni et al. 2013). Deep ...
Carbon-enhanced metal-poor stars in dwarf galaxies
... log(L/L# ) < 4.0 (shown in Fig. 1 with red circles), are from high-resolution spectroscopic studies (see caption for references). Although less than 20 stars have been observed in these 4 systems, the overall frequency of CEMP-no stars is very high, and at [Fe/H]≤ −3, 5 out of 6 stars are CEMP-no st ...
... log(L/L# ) < 4.0 (shown in Fig. 1 with red circles), are from high-resolution spectroscopic studies (see caption for references). Although less than 20 stars have been observed in these 4 systems, the overall frequency of CEMP-no stars is very high, and at [Fe/H]≤ −3, 5 out of 6 stars are CEMP-no st ...
Full-text PDF
... the luminosity function, and recent attempts to fit observed luminosity functions have been forced to include additional feedback processes in massive systems (e.g. Benson et al. 2003). In this paper we argue that radio sources may provide the required feedback while at the same time providing a sol ...
... the luminosity function, and recent attempts to fit observed luminosity functions have been forced to include additional feedback processes in massive systems (e.g. Benson et al. 2003). In this paper we argue that radio sources may provide the required feedback while at the same time providing a sol ...
X. Nuclear star clusters in low-mass early-type galaxies
... Fig. 6). For a host galaxy absolute magnitude MF814W = −13 mag, the difference between the host galaxy magnitude and the magnitude of a point source that could be detected at 3σ level is expected to be ∼4.7 mag (and lower than 4 for MF814W = −11). We decided therefore to clip the faint part of our s ...
... Fig. 6). For a host galaxy absolute magnitude MF814W = −13 mag, the difference between the host galaxy magnitude and the magnitude of a point source that could be detected at 3σ level is expected to be ∼4.7 mag (and lower than 4 for MF814W = −11). We decided therefore to clip the faint part of our s ...
Gamma Ray Burst Afterglows and Host Galaxies
... three GRB Host Galaxies. Bluer is down, fainter is to the right. (From Fruchter et al 1999.) ...
... three GRB Host Galaxies. Bluer is down, fainter is to the right. (From Fruchter et al 1999.) ...
The formation of disc galaxies in high-resolution moving
... by the numerical scheme employed for solving hydrodynamics, as emphasized recently (Kereš et al. 2012; Sijacki et al. 2012; Torrey et al. 2012; Vogelsberger et al. 2012). These studies have shown that accuracy differences between smoothed particle hydrodynamics (SPH, as implemented in the GADGET co ...
... by the numerical scheme employed for solving hydrodynamics, as emphasized recently (Kereš et al. 2012; Sijacki et al. 2012; Torrey et al. 2012; Vogelsberger et al. 2012). These studies have shown that accuracy differences between smoothed particle hydrodynamics (SPH, as implemented in the GADGET co ...
ALMA Science Results
... case of the prototypical blue compact dwarf II Zw 40 • Amanda Kepley, National Radio Astronomy Observatory – Metallicity and star formation rate surface density critical to understanding; blue compact dwarfs are ideal labs to study these effects. – IIZw40 has low metallicity (0.2 solar) and high sta ...
... case of the prototypical blue compact dwarf II Zw 40 • Amanda Kepley, National Radio Astronomy Observatory – Metallicity and star formation rate surface density critical to understanding; blue compact dwarfs are ideal labs to study these effects. – IIZw40 has low metallicity (0.2 solar) and high sta ...
Preliminary Talk Abstract Book - MoCA
... this talk I will discuss recent progress studying the rest-frame optical properties of quiescent galaxies at this critical epoch using KMOS - a multi-IFU near-infrared spectrograph on the VLT - and in particular highlight recent results from the VIRIAL survey, whose aim is to provide a census of qui ...
... this talk I will discuss recent progress studying the rest-frame optical properties of quiescent galaxies at this critical epoch using KMOS - a multi-IFU near-infrared spectrograph on the VLT - and in particular highlight recent results from the VIRIAL survey, whose aim is to provide a census of qui ...
Simulations of the galaxy population constrained by observations
... We propose a specific model in which reincorporation timescales vary inversely with halo mass and are independent of redshift. This produces an evolving galaxy population which fits observed abundances as a function of stellar mass, B- and K-band luminosity at all redshifts simultaneously. It also p ...
... We propose a specific model in which reincorporation timescales vary inversely with halo mass and are independent of redshift. This produces an evolving galaxy population which fits observed abundances as a function of stellar mass, B- and K-band luminosity at all redshifts simultaneously. It also p ...
Star formation in a galactic outflow
... chemical enrichment of the circumgalactic and intergalactic medium (through supernova explosions of young stars on large orbits), and some models also predict that it may contribute substantially to the global star formation rate observed in distant galaxies9. Although there exists observational evi ...
... chemical enrichment of the circumgalactic and intergalactic medium (through supernova explosions of young stars on large orbits), and some models also predict that it may contribute substantially to the global star formation rate observed in distant galaxies9. Although there exists observational evi ...
A Budget and Accounting of Metals at z~ 0: Results from the COS
... sample of 44 galaxies observed by HST/COS along QSO sightlines passing within 150 physical kpc of z ∼ 0.25 galaxies over a range of stellar mass and star formation properties. The rationale and design for COS-Halos are described in Tumlinson et al. (2013); the key findings on metal lines are found i ...
... sample of 44 galaxies observed by HST/COS along QSO sightlines passing within 150 physical kpc of z ∼ 0.25 galaxies over a range of stellar mass and star formation properties. The rationale and design for COS-Halos are described in Tumlinson et al. (2013); the key findings on metal lines are found i ...
A catalogue of the Chandra Deep Field South with multi
... accurately. In fact, we need to measure the same central fraction of an object in every band as it would appear in equal seeing. To this end, we use the seeing-adaptive, weighted aperture photometry in the MPIAPHOT package (Röser & Meisenheimer 1991; Meisenheimer et al. 2004). MPIAPHOT measures the ...
... accurately. In fact, we need to measure the same central fraction of an object in every band as it would appear in equal seeing. To this end, we use the seeing-adaptive, weighted aperture photometry in the MPIAPHOT package (Röser & Meisenheimer 1991; Meisenheimer et al. 2004). MPIAPHOT measures the ...
Pea galaxy
A Pea galaxy, also referred to as a Pea or Green Pea, might be a type of Luminous Blue Compact Galaxy which is undergoing very high rates of star formation. Pea galaxies are so-named because of their small size and greenish appearance in the images taken by the Sloan Digital Sky Survey (SDSS).Pea Galaxies were first discovered in 2007 by the volunteer users within the forum section of the online astronomy project Galaxy Zoo (GZ).