東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

The Undiscovered CO: Charting the Mo...

Keating, Garrett Kent.

Linked to FindBook

Google Book

Amazon

博客來

The Undiscovered CO: Charting the Molecular Gas of the Early Universe.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The Undiscovered CO: Charting the Molecular Gas of the Early Universe./
Author:	Keating, Garrett Kent.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	130 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-01(E), Section: B.
Contained By:	Dissertation Abstracts International78-01B(E).
Subject:	Astrophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10150993
ISBN:	9781369057577

The Undiscovered CO: Charting the Molecular Gas of the Early Universe.
Keating, Garrett Kent.

The Undiscovered CO: Charting the Molecular Gas of the Early Universe. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 130 p.

Source: Dissertation Abstracts International, Volume: 78-01(E), Section: B.

Thesis (Ph.D.)--University of California, Berkeley, 2016.

Molecular gas, observed through tracers such as CO rotational transitions, is a vital component of galactic evolution and star formation. Recent detections of the CO molecule in massive galaxies at high redshift have demonstrated its existence in the early Universe, and have motivated its use as a means of exploring large-scale structure and as a probe of galaxy evolution in the early Universe. But many questions about molecular gas and the evolution of galaxies in the early Universe still remain: its distribution at high redshift understood is so poorly that theoretical models of the mean abundance of CO for the first several billion years of cosmic history span orders of magnitude. Direct detection of molecular gas in galaxies at these redshifts have only found the largest and most luminous of galaxies in the early Universe, whereas the bulk of the molecular gas is expected to be in the unseen masses of smaller galaxies. While difficult to detect individually, these smaller galaxies are likely detectable as an integrated ensemble with the technique of ''intensity mapping". This technique, similar to those employed by HI epoch of reionization experiments, utilizes measurements of different 3D Fourier modes to construct a power spectrum.

ISBN: 9781369057577Subjects--Topical Terms:

535904
Astrophysics.

The Undiscovered CO: Charting the Molecular Gas of the Early Universe.
LDR:03362nmm a2200301 4500 001 2122449
005 20170922124917.5
008 180830s2016 ||||||||||||||||| ||eng d
020 $a 9781369057577
035 $a (MiAaPQ)AAI10150993
035 $a AAI10150993
040 $a MiAaPQ $c MiAaPQ
100 1 $a Keating, Garrett Kent. $3 3284422
245 1 4 $a The Undiscovered CO: Charting the Molecular Gas of the Early Universe.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 130 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-01(E), Section: B.
500 $a Adviser: Carl E. Heiles.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2016.
520 $a Molecular gas, observed through tracers such as CO rotational transitions, is a vital component of galactic evolution and star formation. Recent detections of the CO molecule in massive galaxies at high redshift have demonstrated its existence in the early Universe, and have motivated its use as a means of exploring large-scale structure and as a probe of galaxy evolution in the early Universe. But many questions about molecular gas and the evolution of galaxies in the early Universe still remain: its distribution at high redshift understood is so poorly that theoretical models of the mean abundance of CO for the first several billion years of cosmic history span orders of magnitude. Direct detection of molecular gas in galaxies at these redshifts have only found the largest and most luminous of galaxies in the early Universe, whereas the bulk of the molecular gas is expected to be in the unseen masses of smaller galaxies. While difficult to detect individually, these smaller galaxies are likely detectable as an integrated ensemble with the technique of ''intensity mapping". This technique, similar to those employed by HI epoch of reionization experiments, utilizes measurements of different 3D Fourier modes to construct a power spectrum.
520 $a In this thesis, I present results from the CO Power Spectrum Survey (COPSS), an intensity mapping experiment performed with the Sunyaev Zel'dovich Array (SZA). I present power spectrum constraints from of the first and second phase of this project, utilizing an archival dataset (covering 44 fields in 1400 hours observing time) and a 5000-hour observing campaign (covering 19 fields) with the SZA. With these data, we are capable of observing CO(1-0) emission arising from z = 2.3{-}3.3, surveying a volume of more than ten million cubic megaparsecs. With this measurement, we place the first-ever constraints on the CO autocorrelation power spectrum, and place constraints on the CO(1-0) galaxy luminosity function and the cosmic molecular gas density at z &sim; 3.
520 $a I also present a series of simulations designed to probe the impact of cosmic variance, continuum foregrounds, and systematic errors on our measurement with the SZA. I will also present simulations designed to probe the challenges that will face intensity mapping experiments with the Yuan-Tseh Lee Array (YTLA). Finally, I will present some preliminary work on CO(3-2) and [CII] intensity mapping experiments.
590 $a School code: 0028.
650 4 $a Astrophysics. $3 535904
690 $a 0596
710 2 $a University of California, Berkeley. $b Astrophysics. $3 1683900
773 0 $t Dissertation Abstracts International $g 78-01B(E).
790 $a 0028
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10150993