scholarly journals An imaging K-band survey – II. The redshift survey and galaxy evolution in the infrared

1995 ◽  
Vol 275 (1) ◽  
pp. 169-184 ◽  
Author(s):  
Karl Glazebrook ◽  
J. A. Peacock ◽  
L. Miller ◽  
C. A. Collins
Keyword(s):  
Galaxy Evolution ◽  
Redshift Survey ◽  
Band Survey ◽  
K Band

Studies of Star-Forming Galaxies at High-Z. II: The First Results of Cosmos K Band Survey

2001 ◽  
pp. 367-367
Author(s):  
D. Cristóbal ◽  
M. Prieto ◽  
R. Guzmán ◽  
M. Balcells ◽  
J. Acosta ◽  
...  
Keyword(s):  
Star Forming ◽  
First Results ◽  
Band Survey ◽  
K Band

scholarly journals THE CARNEGIE-SPITZER-IMACS REDSHIFT SURVEY OF GALAXY EVOLUTION SINCEz= 1.5. I. DESCRIPTION AND METHODOLOGY

2014 ◽  
Vol 783 (2) ◽  
pp. 110 ◽  
Author(s):  
Daniel D. Kelson ◽  
Rik J. Williams ◽  
Alan Dressler ◽  
Patrick J. McCarthy ◽  
Stephen A. Shectman ◽  
...  
Keyword(s):  
Galaxy Evolution ◽  
Redshift Survey

scholarly journals K Band Galaxy Counts in the South Galactic Pole Region

1999 ◽  
Vol 183 ◽  
pp. 257-257
Author(s):  
T. Minezaki ◽  
Y. Kobayashi ◽  
Y. Yoshii ◽  
B. A. Peterson
Keyword(s):  
Survey Area ◽  
The South ◽  
The Galaxy ◽  
Similar Area ◽  
Large Survey ◽  
Number Counts ◽  
Band Survey ◽  
K Band

We carried out a K′ band survey during August and September, 1994, in the south galactic pole region that covers 180.8 arcmin2 to K = 19 and 2.21 arcmin2 to K = 21 by the ANU 2.3 m telescope at SSO, Australia, equipped with PICNIC, developed at NAOJ. New galaxy number counts from K = 13 to 22 were obtained, which provided the best determination of the galaxy counts from K = 17.5 to 19.0 because of our large survey area. They were very consistent with Gardner, Cowie, & Wainscoat (1993, ApJL, 415, 9) and other observations to K < 19, however, they were larger than the galaxy counts of Saracco et al. (1997, AJ, 114, 887) with similar area and depth of survey around that magnitudes.

scholarly journals Gravity and the non-linear growth of structure in the Carnegie-Spitzer-IMACS Redshift Survey

2020 ◽  
Vol 494 (2) ◽  
pp. 2628-2640 ◽  
Author(s):  
Daniel D Kelson ◽  
Louis E Abramson ◽  
Andrew J Benson ◽  
Shannon G Patel ◽  
Stephen A Shectman ◽  
...  
Keyword(s):  
Galaxy Evolution ◽  
Linear Growth ◽  
Real Space ◽  
Density Fluctuations ◽  
Analytic Description ◽  
Newtonian Gravity ◽  
Density Growth ◽  
Non Linear ◽  
Redshift Survey ◽  
Analytic Prediction

ABSTRACT A key obstacle to developing a satisfying theory of galaxy evolution is the difficulty in extending analytic descriptions of early structure formation into full non-linearity, the regime in which galaxy growth occurs. Extant techniques, though powerful, are based on approximate numerical methods whose Monte Carlo-like nature hinders intuition building. Here, we develop a new solution to this problem and its empirical validation. We first derive closed-form analytic expectations for the evolution of fixed percentiles in the real-space cosmic density distribution, averaged over representative volumes observers can track cross-sectionally. Using the Lagrangian forms of the fluid equations, we show that percentiles in δ – the density relative to the median – should grow as $\delta (t)\propto \delta _{0}^{\alpha }\, t^{\beta }$, where α ≡ 2 and β ≡ 2 for Newtonian gravity at epochs after the overdensities transitioned to non-linear growth. We then use 9.5 square degress of Carnegie-Spitzer-IMACS Redshift Survey data to map galaxy environmental densities over 0.2 &lt; z &lt; 1.5 (∼7 Gyr) and infer α = 1.98 ± 0.04 and β = 2.01 ± 0.11 – consistent with our analytic prediction. These findings – enabled by swapping the Eulerian domain of most work on density growth for a Lagrangian approach to real-space volumetric averages – provide some of the strongest evidence that a lognormal distribution of early density fluctuations indeed decoupled from cosmic expansion to grow through gravitational accretion. They also comprise the first exact, analytic description of the non-linear growth of structure extensible to (arbitrarily) low redshift. We hope these results open the door to new modelling of, and insight-building into, galaxy growth and its diversity in cosmological contexts.

scholarly journals NIR Follow-Up of the VVDS 02hr Field: First Results

2006 ◽  
Vol 2 (S235) ◽  
pp. 432-437
Author(s):  
S. Temporin ◽  
A. Iovino ◽  
H. J. McCracken ◽  
M. Bolzonella ◽  
M. Scodeggio ◽  
...  
Keyword(s):  
Near Infrared ◽  
High Redshift ◽  
First Results ◽  
Band Survey ◽  
K Band

AbstractWe present a new K-band survey covering 623 arcmin2 in the VVDS 0226-0430 deep field down to a limiting magnitude KVega ≤ 20.5. We use the spectroscopic sample extracted from this new K-band catalogue to assess the effectiveness of optical-near infrared color selections in identifying extreme classes of objects at high redshift.

scholarly journals An imaging K-band survey - I. The catalogue, star and galaxy counts

1994 ◽  
Vol 266 (1) ◽  
pp. 65-91 ◽  
Author(s):  
K. Glazebrook ◽  
J. A. Peacock ◽  
C. A. Collins ◽  
L. Miller
Keyword(s):  
Band Survey ◽  
K Band

scholarly journals Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 Mpc

2020 ◽  
Vol 494 (2) ◽  
pp. 1784-1816
Author(s):  
D Asmus ◽  
C L Greenwell ◽  
P Gandhi ◽  
P G Boorman ◽  
J Aird ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galaxy Evolution ◽  
Galactic Nuclei ◽  
Wide Field ◽  
X Ray ◽  
Sky Survey ◽  
Galaxy Sample ◽  
Redshift Survey ◽  
Infrared Survey

ABSTRACT To answer major questions on supermassive black hole (SMBH) and galaxy evolution, a complete census of SMBH growth, i.e. active galactic nuclei (AGN), is required. Thanks to all-sky surveys by the Wide-field Infrared Survey Explorer (WISE) and the Spectrum-Roentgen-Gamma (SRG) missions, this task is now feasible in the nearby Universe. We present a new survey, the Local AGN Survey (LASr), with the goal of identifying AGN unbiased against obscuration and determining the intrinsic Compton-thick (CT) fraction. We construct the most complete all-sky galaxy sample within 100 Mpc ($90{{\ \rm per\ cent}}$ completeness for log (M*/M⊙) ∼ 9.4), four times deeper than the current reference, the Two Micron All-Sky Survey Redshift Survey (2MRS), which misses ${\sim}20{{\ \rm per\ cent}}$ of known luminous AGN. These 49k galaxies serve as parent sample for LASr, called LASr-GPS. It contains 4.3k already known AGN, $\ge 82{{\ \rm per\ cent}}$ of these are estimated to have $L^\mathrm{nuc}(12\, \mu \mathrm{m})\lt 10^{42.3}$ erg s−1, i.e. are low-luminosity AGN. As a first method for identifying Seyfert-like AGN, we use WISE-based infrared colours, finding 221 galaxies at $L^\mathrm{nuc}(12\, \mu \mathrm{m})\ge 10^{42.3}$ erg s−1 to host an AGN at $90{{\ \rm per\ cent}}$ reliability. This includes 61 new AGN candidates and implies an optical type 2 fraction of 50–71 per cent. We quantify the efficiency of this technique and estimate the total number of AGN with $L^\mathrm{int}(\rm {2-10\,keV})\ge 10^{42}$ erg s−1 in the volume to be $362^{+145}_{-116}$ ($8.6^{+3.5}_{-2.8}\, \times$ 10−5 Mpc−3). X-ray brightness estimates indicate the CT fraction to be 40–55 per cent to explain the Swift non-detections of the infrared selected objects. One third of the AGN within 100 Mpc remain to be identified, and we discuss the prospects for the eROSITA all-sky survey to detect them.

scholarly journals Galaxy Evolution Traced by Multiple Galaxies from the BIG Sample

2006 ◽  
Vol 2 (S235) ◽  
pp. 225-225 ◽  
Author(s):  
Areg M. Mickaelian
Keyword(s):  
Galaxy Evolution ◽  
Special Astrophysical Observatory ◽  
Redshift Distribution ◽  
Ir Radiation ◽  
Galaxy Interactions ◽  
Or Groups ◽  
The Galaxy ◽  
Redshift Survey ◽  
Optical Identifications

AbstractOptical identifications of all IRAS PSC sources at high galactic latitudes by means of the First Byurakan Survey (FBS) in the area with +61° < δ < +90° at galactic latitudes |b|>15° have been carried out with a total surface of 1487 deg2. 1577 sources have been optically identified, 1178 sources corresponding to galaxies. The BIG sample (Byurakan-IRAS Galaxies) was constructed of 1178 newly identified galaxies and 789 other IRAS galaxies in the same area, known before, altogether 1967 galaxies. Studies of the BIG objects include: spectroscopic follow-up for the brighter (<18m) objects; discovery and study of new AGN; discovery and study of new ULIRGs; deep imagery of the most interesting objects and the “empty fields”; 2D spectroscopy of interacting/merging systems; search for obscured IRAS galaxies (with the Spitzer Space Telescope), etc. The BIG objects are a rich source for new AGN, high-luminosity IR galaxies (hence, starburst activity), and interacting/merging systems. All these phenomena are crucial for understanding the galaxy evolution and their interrelation, as well as the triggering of the powerful IR radiation. In frame of the redshift survey of these galaxies, spectroscopic observations have been carried out for the BIG objects (including the pairs and multiples) by means of the Byurakan Astrophysical Observatory (BAO, Armenia) 2.6m, Special Astrophysical Observatory (SAO, Russia) 6m, and Observatoire de Haute Provence (OHP, France) 1.93m telescopes. It is shown that, without an exception, all double/multiple BIG systems are physical pairs or groups, and they are mostly interacting and/or merging systems. From the high IR luminosities derived from the observations, one can conclude that perhaps the ULIRG/HLIRG phenomenon is connected with galaxy interactions/merging. We find an evolution in luminosity function of these objects with respect to their redshift distribution.Existence of AGN among the multiple BIG objects provides a chance for study of the galaxy evolution in sense of interrelationship between the three phenomena: starburst, interactions/merging, and nuclear activity. We have shown (Mickaelian et al. 2001) that the maximum IR luminosity of a single spiral galaxy may not be larger than 1012 Solar luminosities. Hence, all high-L IRAS galaxies are interacting pairs/multiples or mergers. But what is the relation of the active nucleus to the starburst (i.e. IR) activity?

scholarly journals A wide-field K-band survey — I. Galaxy counts in B, V, I and K

1996 ◽  
Vol 282 (1) ◽  
pp. L1-L6 ◽  
Author(s):  
J. P. Gardner ◽  
R. M. Sharpies ◽  
B. E. Carrasco ◽  
C. S. Frenk
Keyword(s):  
Wide Field ◽  
Band Survey ◽  
K Band
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