Results 31 to 40 of about 314,301 (152)

A Lepton–Hadron Model for the Multi-Wavelength Emission from Extreme High-Frequency Peaked BL Lacertae 1ES 1218+304

Galaxies, 2023
We develop a lepton–hadron model for the possible origin of hard very high energy (VHE) spectra from a distant blazar. The model includes synchrotron self-Compton (SSC) and hadronic components.
Wenjing Dong, Qian Dong, Yonggang Zheng
doaj   +1 more source

The DEEP2 Galaxy Redshift Survey: Discovery of Luminous, Metal-poor, Sta r-forming Galaxies at Redshifts z~0.7 [PDF]

, 2005
We have discovered a sample of 17 metal-poor, yet luminous, star-forming galaxies at redshifts z~0.7. They were selected from the initial phase of the DEEP2 survey of 3900 galaxies and the Team Keck Redshift Survey (TKRS) of 1536 galaxies as those ...
A. C. Phillips, C. Hoyos, C. N. A. Willmer, D. C. Koo, Lequeux J., P. Guhathakurta, Pagel B. E. J., Pagel B. E. J., Pilyugin L. S., Rola C. S., Terlevich R., Terlevich R. J.   +11 more
core   +1 more source

Structural and Morphological Properties of Ultraluminous Infrared Galaxies at 1 < z < 3

Open Astronomy, 2015
Using the Hubble Space Telescope (HST)/Wide Field Camera 3 (WFC3) near-infrared high-resolution imaging from the 3D-HST survey, we analyze the morphology and structure of 502 ultraluminous infrared galaxies (ULIRGs; LIR > 1012L⊙) at 1 < z < 3. Their rest-
Fang Guanwen, Ma Zhongyang, Chen Yang, Kong Xu   +3 more
doaj   +1 more source

ZELDOVICH LOCAL PANCAKE: DARK ENERGY DOMINATION

Odessa Astronomical Publications, 2018
Zeldovich Local Pancake is a two-dimensional system of 15 giant galaxies nearest to us. Two of the galaxies, the Milky Way and the Andromeda Galaxy, move to each other in the Local Group, while the rest of the galaxies are located around the group at ...
A. D. Chernin, I. D. Karachentsev, N. V. Emelyanov   +2 more
doaj   +1 more source

The Seyfert Population in the Local Universe

, 2003
The magnitude-limited catalog of the Southern Sky Redshift Survey (SSRS2), is used to characterize the properties of galaxies hosting Active Galactic Nuclei.
Christopher N. A. Willmer, Efstathiou G., Felten J. E., Kelm B., Kohler T., Kollatschny W., Laurikainen E., Laurikainen E., Maddox S. J., Maia M. A. G., Marcio A. G. Maia, Noguchi M., Petrosian A. R., Rodolfo S. Machado   +13 more
core   +1 more source

The evolution of the mass-size relation to z=3.5 for UV-bright galaxies and sub-mm galaxies in the GOODS-NORTH field

, 2010
We study the evolution of the size - stellar mass relation for a large spectroscopic sample of galaxies in the GOODs North field up to $z \sim 3.5$. The sizes of the galaxies are measured from $\textit{K}_{s}$-band images (corresponding to rest-frame ...
Franx, Marijn, Kriek, Mariska, Mosleh, Moein, Williams, Rik J.   +3 more
core   +1 more source

Massive Stars in the Tarantula Nebula: A Rosetta Stone for Extragalactic Supergiant HII Regions

Galaxies, 2019
A review of the properties of the Tarantula Nebula (30 Doradus) in the Large Magellanic Cloud is presented, primarily from the perspective of its massive star content.
Paul A. Crowther
doaj   +1 more source

266 E+A Galaxies Selected from the Sloan Digital Sky Survey Data Release 2: The Origin of E+A Galaxies

, 2005
E+A galaxies are characterized as a galaxy with strong Balmer absorption lines but without any [OII] nor H$\alpha$ emission lines. The existence of strong Balmer absorption lines indicates that E+A galaxies have experienced starburst within recent one ...
Abadi, Abazajian, Abraham, Barger, Bartholomew, Bekki, Belloni, Bennett, Blake, Blanton, Butcher, Caldwell, Caldwell, Caldwell, Carter, Castander, Chang, Couch, Couch, Dressler, Dressler, Dressler, Dressler, Fabricant, Farouki, Fisher, Fujita, Fujita, Fujita, Fujita, Galaz, Goto, Goto, Goto, Goto, Goto, Goto, Goto, Goto, Goto, Goto, Gunn, Hashimoto, Kent, Lavery, Lavery, Liu, Liu, MacLaren, Mateus, Mihos, Miller, Morris, Moss, Moss, Newberry, Norton, Oegerle, Poggianti, Poggianti, Poggianti, Postman, Quilis, Quintero, Rose, Schweizer, Schweizer, Scranton, Sharples, Shimasaku, Shioya, Shioya, Smail, Spitzer, Strateva, Tanaka, Tomotsugu Goto, Tran, Tran, Yamauchi   +79 more
core   +2 more sources

The Role of Starbursts in the Formation of Galaxies & Active Galactic Nuclei

, 1999
Starbursts are episodes of intense star-formation in the central regions of galaxies, and are the sites of roughly 25% of the high-mass star-formation in the local universe.
Buat V., C. S. Frenk, Dunlop J., S. D. M. White, Schmitt H., Timothy Heckman   +5 more
core   +1 more source

Modeling the Radial Color Profile of M31

Open Astronomy, 2003
We present a preliminary study of a fragment of the radial color profile of the spiral galaxy M 31 in terms of 2-D model accounting for internal extinction in the disk. The two stellar population disk model was assumed.
Semionov D., Stonkutė R., Vansevičius V.   +2 more
doaj   +1 more source