Results 101 to 110 of about 418,206 (216)

Genuine Irregular Galaxies as a Relic of Building Blocks of Galaxies

, 2013
In order to understand nature of building blocks of galaxies in the early universe, we investigate "genuine irregular galaxies (GIGs)" in the nearby universe. Here, GIGs are defined as isolated galaxies without regular structures (spheroid, bulge, disk, bar, spiral arm, and nucleus). Using the results of two excellent studies on galaxy morphology based
Terao, K., Taniguchi, Y., Kajisawa, M., Shioya, Y., Kobayashi, M. A. R., Matsuoka, K., Ikeda, H., Murata, K. L., Ichikawa, A., Shimizu, M., Niida, M., Hamaguchi, E.   +11 more
openaire   +2 more sources

A γ-Ray-emitting Collisional Ring Galaxy System in Our Galactic Neighborhood

The Astrophysical Journal Letters
The astrophysical γ -ray photons carry the signatures of the violent phenomena happening on various astronomical scales in our Universe. This includes supernova remnants, pulsars, and pulsar wind nebulae in the Galactic environment and extragalactic ...
Vaidehi S. Paliya, D. J. Saikia
doaj   +1 more source

The Hot and Energetic Universe:The evolution of galaxy groups and clusters [PDF]

, 2013
Major astrophysical questions related to the formation and evolution of structures, and more specifically of galaxy groups and clusters, will still be open in the coming decade and beyond: what is the interplay of galaxy, supermassive black hole, and ...
Bourdin, H., Maughan, B., Molendi, S., Mohr, J., von der Linden, A., Borgani, S., Sanders, J., Biffi, V., Dolag, K., H. Reiprich, T., Clerc, N., Smith, R., Springel, V., Arnaud, M., Brueggen, M., Finoguenov, A., Hoekstra, H., Hildebrandt, H., Marrone, D., Pointecouteau, E., Rasia, E., Boehringer, H., Romer, K., Schwope, A., Mazzotta, P., de Plaa, J., Nevalainen, J., Pierre, M., Borm, K., W. Pratt, G., Kaastra, J., Schrabback, T., Allen, S., Fassbender, R., Schindler, S., Ramos-Ceja, M., Lovisari, L., Ohashi, T., Pacaud, F., Adami, C., Elbaz, D., Bulbul, E., Ota, N., H. Croston, J., -Y. Zhang, Y., Brunetti, G., Ettori, S., Lamer, G.   +47 more
core  

Galaxy And Mass Assembly (GAMA) : galaxy close pairs, mergers and the future fate of stellar mass [PDF]

, 2014
ASGR acknowledges STFC and SUPA funding that were used to do this work. GAMA is funded by the STFC (UK), the ARC (Australia), the AAO and the participating institutions.We use a highly complete subset of the Galaxy And Mass Assembly II (GAMA-II) redshift
De Propris, R., De Propis, R., T McNaught-Roberts (16161611), Pimbblet, K. A., A Moffett (7731959), Driver, S. P., M S Owers (16161563), Lara-Lopez, M. A., A M Hopkins (16143587), Lopez-Sanchez, Angel R., B W Holwerda (16219943), Jonathan Loveday (4460899), Owers, M. S., R De Propris (16161587), Obreschkow, D., Holwerda, Benne W., M Cluver (16191152), Baldry, I. K., J Bland-Hawthorn (16111139), Davies, L. J. M., Bauer, A. E., E N Taylor (16143620), Brown, M. J. I., A S G Robotham (16143614), M A Lara-Lopez (16161575), A E Bauer (16161566), Hopkins, A. M., E van Kampen (16112642), Brough, S., Loveday, J., McNaught-Roberts, T., I K Baldry (16072595), Moffett, A., Liske, J., Wilkins, S. M., P Norberg (16143575), Holwerda, B. W., Mahajan, S., L S Kelvin (16143602), K Pimbblet (16191149), Penny, S. J., Robotham, A. S. G., van Kampen, E., M Prescott (10000280), M J Drinkwater (16091732), Bland-Hawthorn, J., N K Agius (16219940), Agius, N. K., Prescott, M., M J I Brown (16143632), Cluver, M., Drinkwater, M. J., S J Penny (16219955), Taylor, E. N., Stephen Wilkins (4461910), Lopez-Sanchez, A. R., D Obreschkow (16219952), S Brough (16143590), S Mahajan (16219949), L J M Davies (16219937), Norberg, P., J Liske (7814738), Kelvin, L. S., Pimbblet, K., S P Driver (16143581), A R López-Sánchez (16219946), Loveday, J, Hopkins AM, Moffett A, Kelvin LS, Agius, NK, Mahajan S, Brough, S, Robotham, ASG, Drinkwater, MJ, Moffett, A, Baldry, IK, McNaught-Roberts T, Hopkins, AM, De Propris, R, Pimbblet, K, van Kampen E, Driver, SP, Driver SP, Pimbblet K, van Kampen, E, Brown, MJI, De Propris R, Bland-Hawthorn, J, Davies LJM, Lopez-Sanchez AR, Wilkins SM, Lara-Lopez, MA, Penny SJ, Lopez-Sanchez, AR, Loveday J, Liske J, Lara-Lopez MA, Liske, J, Taylor EN, Davies, LJM, Norberg, P, Obreschkow D, Prescott M, Cluver, M, Brown MJI, Brough S, Robotham, A. S.G., Taylor, EN, Bland-Hawthorn J, Robotham ASG, Prescott, M, Davies, L. J.M., Drinkwater MJ, Obreschkow, D, Wilkins, SM, Kelvin, LS, Penny, SJ, Holwerda BW, Norberg P, Agius NK, Baldry IK, Bauer, AE, Cluver M, Brown, M. J.I., McNaught-Roberts, T, Owers, MS, Mahajan, S, Bauer AE, Holwerda, BW, Owers MS   +130 more
core   +1 more source

Chemical evolution of irregular galaxies

, 1998
10 pages, 3 figs, uses moriond.sty. Review presented at XVIIIth Rencontre de Moriond `Dwarf Galaxies and Cosmology', eds.
openaire   +2 more sources

Galaxy Morphological Classification with Zernike Moments and Machine Learning Approaches

The Astrophysical Journal Supplement Series
Classifying galaxies is an essential step for studying their structures and dynamics. Using GalaxyZoo2 (GZ2) fractions thresholds, we collect 545 and 11,735 samples in nongalaxy and galaxy classes, respectively.
Hamed Ghaderi, Nasibe Alipour, Hossein Safari   +2 more
doaj   +1 more source

Interstellar gas motions around massive star formation regions in the nearby dwarf galaxy DDO43

Acta Polytechnica
Areas of massive star formation are strongly influenced by stellar winds and supernovae, therefore, enhanced turbulent flows are expected. We analyse high-quality Karl G. Jansky Very Large Array observations of the neutral hydrogen gas content of DDO43,
Enikő Pichler, Bendegúz Koncz, Krisztina É. Gabányi, András Péter Joó, L. Viktor Tóth   +4 more
doaj   +1 more source

Constraining dark energy using real and mock galaxy surveys [PDF]

, 2009
In this thesis, we study how dark energy may be constrained by measurements of large-scale clustering in future galaxy surveys, and through the imprint of a time-varying large-scale potential on the CMB (the integrated Sachs-Wolfe effect).
CAI, YANCHUAN
core  

A Luminous X-Ray Active Galactic Nucleus in the Dwarf–Dwarf Galaxy Merger RGG 66

The Astrophysical Journal
We present the discovery of a luminous X-ray active galactic nucleus (AGN) in the dwarf galaxy merger RGG 66. The black hole is predicted to have a mass of M _BH ∼ 10 ^5.4 M _⊙ and to be radiating close to its Eddington limit ( L _bol / L _Edd ∼ 0.75 ...
Seth J. Kimbrell, Amy E. Reines
doaj   +1 more source

Assessing Galaxy Rotation Kinematics: Insights from Convolutional Neural Networks on Velocity Variations

Universe
Distinguishing galaxies as either fast or slow rotators plays a vital role in understanding the processes behind galaxy formation and evolution. Standard techniques, which are based on the λR spin parameter obtained from stellar kinematics, frequently ...
Amirmohammad Chegeni, Fatemeh Fazel Hesar, Mojtaba Raouf, Bernard Foing, Fons J. Verbeek   +4 more
doaj   +1 more source