bluuebunny/crossref_metadata_2025_split huggingface dataset:
Role of massive stars in the evolution of primitive galaxies
Authors: Heap Sara 
Published: March 2015

AbstractAn important factor controlling galaxy evolution is feedback from massive stars. It is believed that the nature and intensity of stellar feedback changes as a function of galaxy mass and metallicity. At low mass and metallicity, feedback from massive stars is mainly in the form of photoionizing radiation. At higher mass and metallicity, it is in stellar winds. I Zw 18 is a local blue, compact dwarf galaxy that meets the requirements for a primitive galaxy: low halo mass <109M⊙, strong photoionizing radiation, no galactic outflow, and very low metallicity, log(O/H)+12=7.2. We will describe the properties of massive stars and their role in the evolution of I Zw 18, based on analysis of ultraviolet images and spectra obtained with HST.
Bars in a cosmological context
Authors: Martig Marie , Kraljic Katarina , Bournaud Frédéric 
Published: March 2015

AbstractWe study the properties of bars in a series of zoom cosmological simulations (Martig et al.2012, Kraljic et al.2012). We find that bars are almost absent from galaxies at z>1, and if they form they tend to be quickly destroyed by mergers and instabilities. On the contrary, at z<1 bars are long-lived, and the fraction of barred galaxies rises steadily. Bars are eventually found in ~ 80% of z=0 spiral galaxies. This redshift evolution is quantitatively consistent with existing data from the COSMOS survey (Sheth et al.2008), although the detectability of bars is presently limited to z<0.8 because of band-shifting and resolution effects. We predict later bar formation in lower-mass galaxies, also in agreement with existing data (e.g., Sheth et al.2012). We actually find that the characteristic epoch of bar formation is the epoch of massive thin disk formation, corresponding to the transition between an early violent phase at z > 1 and a later secular phase. Bar formation thus traces the emergence of the disk-dominated morphology of today's spirals.
Hydrodynamical simulations of the barred spiral galaxy NGC 1097
Authors: Lin Lien-Hsuan , Wang Hsiang-Hsu , Hsieh Pei-Ying , Taam Ronald E. , Yang Chao-Chin , Yen David C. C. 
Published: March 2015

AbstractNGC 1097 is a nearby barred spiral galaxy believed to be interacting with the elliptical galaxy NGC 1097A located to its northwest. It hosts a Seyfert 1 nucleus surrounded by a circumnuclear starburst ring. Two straight dust lanes connected to the ring extend almost continuously out to the bar. The other ends of the dust lanes attach to two main spiral arms. To provide a physical understanding of its structural and kinematical properties, two-dimensional hydrodynamical simulations have been carried out. Numerical calculations reveal that many features of the gas morphology and kinematics can be reproduced provided that the gas flow is governed by a gravitational potential associated with a slowly rotating strong bar. By including the self-gravity of the gas disk in our calculation, we have found the starburst ring to be gravitationally unstable which is consistent with the observation in Hsieh et al. (2011). Our simulations also show that gas can flow into the region within the starburst ring even after its formation, leading to the coexistence of both a nuclear ring and a circumnuclear disk.
Characterizing the correlation between column density structure and magnetic fields
Authors: Soler J. D. , Hennebelle P. , Martin P. G. , Miville-Deschenes M. A. , Netterfield B. ,   The BLASTpol Collaboration
Published: March 2015

AbstractWe present a statistical tool to characterize correlation between the column density structure and the polarized emission from a molecular cloud. This tool uses the gradient as an estimator of the directionality of the structure in order to systematically relate the orientation of filaments and cores to the orientation of the magnetic field inferred from the polarization vectors.
Probing Magnetic Fields With SNRs
Authors: Kothes Roland 
Published: March 2015

AbstractAs supernova remnants (SNRs) expand, their shock waves freeze in and compress magnetic field lines they encounter; consequently we can use SNRs as magnifying glasses for interstellar magnetic fields. A simple model is used to derive polarization and rotation measure (RM) signatures of SNRs. This model is exploited to gain knowledge about the large-scale magnetic field in the Milky Way. Three examples are given which indicate a magnetic anomaly, an azimuthal large-scale magnetic field towards the anti-centre, and a chimney that releases magnetic energy from the plane into the halo.
The GTTP Movement: Engaging young minds to the beauty of science and space exploration
Authors: Doran Rosa 
Published: March 2015

AbstractThe Galileo Teacher Training Program (GTTP) is a living legacy of IYA2009. As a cornerstone of this important moment in the history of Astronomy, GTTP has managed to name representatives in over 100 nations and reached over 15000 teachers at a global level. The model used so far ensures sustainability and a fast growing support network. The task at hand is to engage educators in the use of modern tools for science teaching. Building the classroom of tomorrow is a promising path to engage young minds to the beauty of science and space exploration.
The ‘Astronomy for the Public’ Task Force
Authors: Ödman-Govender Carolina J. , Robson Ian E. 
Published: March 2015

AbstractOne of the ways in which astronomy can stimulate development is by raising awareness of our place in the universe among the general public. This contributes to inspiring people and brings the scientific community and scientific thinking closer to everyone. The IAU OAD has set up one task force dedicated to ‘Astronomy for the Public’. Proposed activities of the task force range from low-tech astronomy outreach to citizen science. We will present the task force, its objectives and potential developmental impacts for the first few years of operation.
Global Astronomy Month - An Annual Celebration of the Universe
Authors: Heenatigala Thilina , Simmons Mike 
Published: March 2015

AbstractOne of the most successful global outreach efforts in history was the International Year of Astronomy 2009. With the momentum created by this year long program, it was important to take the efforts to coming years. The Astronomers Without Borders organization captured the energy of the International Year of Astronomy 2009 and refocused it as an ongoing annual celebration of the Universe by organizing Global Astronomy Month, a worldwide celebration of astronomy in all its forms, every April. In 2010, the program saw professionals and amateur astronomers, educators and astronomy enthusiasts from around the globe participating together in the spirit of International Year of Astronomy 2009 and provided a global stage for established programs and a framework for partnerships. The 2011 version of the program saw much bigger participation with several global partner organizations joining in creating more than 40 global level programs throughout the month. Within a short period of two years, Global Astronomy Month has evolved to a much needed global platform after International Year of Astronomy 2009.
Amateur Astronomy Network Development in Indonesia
Authors: Yamani Avivah , Malasan Hakim L. 
Published: March 2015

AbstractIndonesia is a very big country with over 238 million people. And we only have one higher learning institution on astronomy, so how do we reach and convey astronomical information effectively to the whole country? The answer lies in Astronomy Clubs who play an increasingly important role to communicate and educate the public. As part of South East Asia, Indonesia is actively involved in the region to develop astronomy.
Astronomy development in Serbia in view of the IAU Strategic Plan
Authors: Atanacković Olga 
Published: March 2015

AbstractAn overview of astronomy development in Serbia in view of the goals envisaged by the IAU Strategic Plan is given. Due attention is paid to the recent reform of education at all levels. In the primary schools several extra topics in astronomy are introduced in the physics course. Attempts are made to reintroduce astronomy as a separate subject in the secondary schools. Special emphasis is put to the role and activities of the Petnica Science Center the biggest center for informal education in SE Europe, and to a successful participation of the Serbian team in International astronomy olympiads. Astronomy topics are taught at all five state universities in Serbia. At the University of Belgrade and Novi Sad students can enroll in astronomy from the first study year. The students have the training at the Ondrejov Observatory (Czech Republic) and at the astronomical station on the mountain Vidojevica in southern Serbia. Astronomy research in Serbia is performed at the Astronomical Observatory, Belgrade and the Department of Astronomy, Faculty of Mathematics, University of Belgrade. There are about 70 researchers in astronomy in Serbia (and about as many abroad) who participate in eight projects financed by the Ministry of Education and Science and in several international cooperations and projects: SREAC, VAMDC, Belissima (recruitment of experienced expatriate researchers), Astromundus (a 2-year joint master program with other four European universities), LSST. One of the goals in near future is twinning between universities in the SEE region and worldwide. The ever-increasing activities of 20 amateur astronomical societies are also given.
Strategic Plan of Development of Astromomy in DPRK
Authors: Jong Sok 
Published: March 2015

AbstractI would like to outline briefly, at first, an introduction to the Pyongyang Astronomical Observatory(PAO) and the present status of PAO. Next, I will mention about its future strategic plan for the development of astronomy research and education as well as the public outreach in DPRK, and the ways and means for its achievement, mainly emphasizing the international cooperation and support by the IAU such as via ROAD and cooperation programs.
Armenia as a Regional Centre for Astronomy for Development activities
Authors: Mickaelian A. 
Published: March 2015

AbstractThe Byurakan Astrophysical Observatory (BAO, Armenia, http://www.bao.am) are among the candidate IAU Regional Nodes for Astronomy for Development activities. It is one of the main astronomical centers of the former Soviet Union and the Middle East region. At present there are 48 qualified researchers at BAO, including six Doctors of Science and 30 PhDs. Five important observational instruments are installed at BAO, the larger ones being 2.6m Cassegrain (ZTA-2.6) and 1m Schmidt (the one that provided the famous Markarian survey). BAO is regarded as a national scientific-educational center, where a number of activities are being organized, such as: international conferences (4 IAU symposia and 1 IAU colloquium, JENAM-2007, etc.), small workshops and discussions, international summer schools (1987, 2006, 2008 and 2010), and Olympiads. BAO collaborates with scientists from many countries. The Armenian Astronomical Society (ArAS, http://www.aras.am/) is an NGO founded in 2001; it has 93 members and it is rather active in the organization of educational, amateur, popular, promotional and other matters. The Armenian Virtual Observatory (ArVO, http://www.aras.am/Arvo/arvo.htm) is one of the 17 national VO projects forming the International Virtual Observatories Alliance (IVOA) and is the only VO project in the region serving also for educational purposes. A number of activities are planned, such as management, coordination and evaluation of the IAU programs in the area of development and education, establishment of the new IAU endowed lectureship program and organization of seminars and public lectures, coordination and initiation of fundraising activities for astronomy development, organization of regional scientific symposia, conferences and workshops, support to Galileo Teacher Training Program (GTTP), production/publication of educational and promotional materials, etc.
Astronomy in Mozambique
Authors: Ribeiro Valério A. R. M. , Paulo Cláudio M. 
Published: March 2015

AbstractWe present the state of Astronomy in Mozambique and how it has evolved since 2009 following the International Year of Astronomy. Activities have been lead by staff at University Eduardo Mondlane and several outreach activities have also flourished. In 2010 the University introduced its first astronomy module, Introduction to Astronomy and Astrophysics, for the second year students in the Department of Physics. The course has now produced the first students who will be graduating in late 2012 with some astronomy content. Some of these students will now be looking for further studies and those who have been keen in astronomy have been recommended to pursue this as a career. At the university level we have also discussed on the possibility to introduce a whole astronomy course by 2016 which falls well within the HCD that the university is now investing in. With the announcement that the SKA will be split between South Africa with its partner countries (including Mozambique), and Australia we have been working closely with the Ministry of Science and Technology to make astronomy a priority on its agenda. In this respect, an old telecommunications antenna is being converted by the South Africa SKA Project Office, and donated to Mozambique for educational purposes. It will be situated in Maluana, Mozambique.
Some thoughts about the IAU Strategic Plan in Latin America and the Caribbean
Authors: Torres-Peimbert Silvia 
Published: March 2015

AbstractThe distribution of overall education and culture among the population in Latin America and the Caribbean has a very wide range; this is also the case for astronomical engagement. The route to follow in the strategic plan needs to address this situation, for the different levels of development. In particular, guidelines should be established for the regional node(s) where achievable goals should be set up and evaluated periodically. I present a set of ideas on this subject.
Molecular cloud structure and star formation in the W43 complex
Authors: Carlhoff P. , Schilke P. , Motte F. , Luong Q. Nguyen 
Published: March 2015

AbstractThe W43 region is one of the most massive star forming regions in our Galaxy. It is subject to a large IRAM 30m project that observes high spectral resolution maps of the complete complex in the 13CO (2–1) and C18O (2–1) lines. We find a variety of different sources of which we calculate excitation temperature, H2 column density and mass. We find the total mass of dense clouds in the complex to be 1.2×106 M⊙.
Physics and chemistry of UV illuminated gas: the Horsehead case
Authors: Guzmán V. , Pety J. , Gratier P. , Goicoechea J. R. , Gerin M. , Roueff E. , Teyssier D. 
Published: March 2015

AbstractMolecular lines are used to trace the physical conditions of the gas in different environments, from high-z galaxies to proto-planetary disks. To fully benefit from the diagnostic power of the molecular lines, the formation and destruction paths of the molecules must be quantitatively understood. This is challenging because the physical conditions are extreme and the dynamic plays an important role. In this context the PDR of the Horsehead mane is a particularly interesting case because the geometry is simple (almost 1D, viewed edge-on; Abergel et al.2003), the density profile is well constrained and we are making several efforts to constrain the thermal profile. The combination of small distance to Earth (at 400 pc, 1″ corresponds to 0.002 pc), low illumination (χ = 60) and high density (nH ~ 105 cm−3) implies that all the interesting physical and chemical processes can be probed in a field-of-view of less than 50″ (with typical spatial scales ranging between 1″ and 10″). Hence, the Horsehead PDR is a good source to benchmark the physics and chemistry of UV illuminated neutral gas.In our recent work on the ISM physics and chemistry in the Horsehead we have shown the importance of the interplay between the solid and gas phase chemistry in the formation of (complex) organic molecules, like H2CO, CH3OH and CH3CN, which reveal that photo-desorption of ices is an efficient mechanism to release molecules into the gas phase (Guzmán et al.2011, Gratier et al. in prep, Guzman et al. in prep)}. We have also provided new diagnostics of the UV illuminated matter. For example, we detected CF+ and resolved its hyperfine structure (Guzman et al.2012b). We propose that CF+, which is observable from the ground, can be used as a proxy of C+ (Guzman et al.2012). Finally, we reported the first detection of the small hydrocarbon C3H+, which sheds light on the formation pathways of other observed small hydrocarbons, like C3H and C3H2 ((Pety et al. 2012). Part of these results were possible thanks to a complete an unbiased line survey at 1, 2 and 3 mm performed with the IRAM-30m telescope (Horsehead WHISPER), where approximately 30 species (plus their isotopologues) are detected.
Chemical enrichment of the ISM by stellar ejecta
Authors: Kwok Sun 
Published: March 2015

AbstractThe family of unidentified infrared emission features, consisting of discrete and plateau features in the mid-infrared, are now observed in distant galaxies. A significant fraction of the total energy output of some infrared galaxies is emitted in these features. Comparisons of these features with those observed in the circumstellar and interstellar media suggest that these organic species are synthesized and ejected by evolved stars. Models of possible chemical structures of the carrier of these features are discussed.
Communicating ALMA with the Public in Japan
Authors: Hiramatsu M. 
Published: March 2015

AbstractI present the strategy and activities of the public outreach and communication of ALMA in Japan. Since most of the public is not familiar with the radio astronomy, we present the human side of ALMA to attract the public interest, as well as by showing the science results. To evoke the public interest on the radio astronomy, it is also effective to show the radio astronomy research topics on the planets, the Sun, and bright stars so that they can connect the daily night sky with the radio universe explored by ALMA.
A Review on Carbon-rich Molecules in Space
Authors: Cataldo Franco , García-Hernández D. Aníbal , Manchado Arturo 
Published: March 2015

AbstractWe present and discuss carbon-rich compounds of astrochemical interest such as polyynes, acetylenic carbon chains and the related derivative known as monocyanopolyynes and dicyanopolyynes. Fullerenes are now known to be abundant in space, while fulleranes - the hydrogenated fullerenes - and other carbon-rich compounds such as very large polycyclic aromatic hydrocarbons (PAHs) and heavy petroleum fractions are suspected to be present in space. We review the synthesis, the infrared spectra as well as the electronic absorption spectra of these four classes of carbon-rich molecules. The existence or possible existence in space of the latter molecules is reported and discussed.
Losing the Dark: A Planetarium PSA about Light Pollution
Authors: Petersen Carolyn Collins , Walker Constance 
Published: March 2015

AbstractLosing the Dark is a six-minute PSA video created for fulldome theaters by Loch Ness Productions, the International Dark Sky Association Education Committee headed by Dr. Constance Walker of the National Optical Astronomy Observatories, Dome3, Adler Planetarium, and Babak Tafreshi (The World at Night). It explains light pollution, its effects, and ways to implement “wise lighting“ practices to mitigate light pollution. The show is also made in flat-screen HD format for classical planetariums, non-dome theaters, and for presentatons by IDA speakers.
Espinho Planetarium's Public Outreach on Light Pollution
Authors: Canas Lina , Silva Pedro B. , Pedrosa Antonio 
Published: March 2015

AbstractNavegar Foundation has dedicated the past twelve years to astronomy public outreach by engaging the community in activities provided by the planetarium and observatory. The activities developed range from exhibitions to telescope observing sessions and planetarium shows. Whether partnering with local entities or with a variety of joint national and international activities, Navegar always had a proactive policy on raising awareness of light pollution issues. The outcomes of these activities are discussed.
GLOBE at Night in China
Authors: Guo Hongfeng 
Published: March 2015

AbstractThe GLOBE at Night citizen-science campaign was introduced in China in 2010. Observations and works made by students are presented. The students were guided to participate in this meaningful international activity by 1) taking light pollution observations of the night sky at different locations, 2) becoming aware of the severity of the effects of light pollution, and 3) making the whole society aware of the importance to save energy by reducing light pollution.
SKYMONITOR: A Global Network for Night Sky Brightness Measurements
Authors: McKenna Dan , Davis Donald , Boley Paul 
Published: March 2015

AbstractWe have deployed a network of autonomous photometers that continuously measures the night sky brightness in the visual region at two sky positions simultaneously, typically near the zenith and the second at an elevation angle of 20 degrees. The Photometers are calibrated as a network to better than 5.
Protection of Northern Chile as an ICOMOS/IAU “Window to the Universe”
Authors: Smith Malcolm G. 
Published: March 2015

AbstractOver the last two decades, La Serena's population has increased by about 70 percent. A site description of the AURA Observatory in Chile as a “Window to the Universe“ is now available on the recently-launched UNESCO-IAU Astronomical Heritage Web Portal, www.astronomicalheritage.net This can serve as an example of possible material for the Chilean authorities, should they wish to propose the dark skies over much of northern Chile for protection as a World Scientific Heritage site. Some of the steps involved are discussed briefly here.
SAAO small telescopes, capabilities and Challenges
Authors: Sefako Ramotholo 
Published: March 2015

AbstractThe SAAO is at a geographically crucial site in the southern hemisphere between South America and Australasia. SAAO has a long history of involvement in infrared and optical astronomy that dates back almost two hundred years. The observatory expects to continue contributing to astronomical research for many years to come, using its small (0.5m, 0.75m, 1.0m and 1.9m) telescopes and their various instruments (ranging from spectroscopy to polarimetry and high-speed photometry), together with the Southern African Large Telescope (SALT) and other hosted international telescopes. In this paper, I discuss the capabilities and uses of the SAAO small telescopes, and the challenges that threaten astronomical research at the observatory, including light pollution and other emerging threats to the usually dust-free and dark-night-sky site at Sutherland. This is mitigated by the legislation called the Astronomy Geographic Advantage (AGA) Act of 2007 that protects the observatory from these threats.