• Non ci sono risultati.

The WHAM survey of ionized gas in the galaxy

N/A
N/A
Info
Scarica
Protected

Academic year: 2022

Condividi "The WHAM survey of ionized gas in the galaxy"

Copied!
1
0
0

Caricamento.... (Visualizza il testo completo ora)

Scarica adesso ( 1 pagine )

Testo completo

(1)

Mem. S.A.It. Vol. 77, 1163

SAIt 2006 c

Memoriedella

The WHAM survey of ionized gas in the galaxy

G.J. Madsen

1,2

, L.M. Haffner

3

, and R.J. Reynolds

3

1

Anglo-Australian Observatory, 167 Vimiera Road, Epping, NSW 1710, Australia e-mail: madsen@aao.gov.au

2

NSF MPS-DRF Fellow

3

Department of Astronomy, University of Wisconsin-Madison, 475 N. Charter Street, Madison, WI 53710, USA

Abstract.

The Wisconsin H-Alpha Mapper (WHAM) is a high-resolution Fabry-Per`ot spectrograph optimized for studying optical emission from faint, diffuse sources. It fea- tures full remote operability and an unprecedented combination of high sensitivity (0.01 Rayleigh; emission measure of 0.03 cm

−6

pc) and high spectral resolution (R = 25, 000).

As its primary mission, WHAM has produced the first kinematically resolved survey of dif- fuse ionized gas in the northern sky comparable to all-sky surveys of neutral gas. The Hα survey work has been extended to other diagnostic emission lines that are used to charac- terize the physical conditions of this poorly understood phase of the interstellar medium.

The unique capabilities of WHAM have been used to study a range of other phenomena including the Earth’s geocorona, the motion of zodiacal dust, large planetary nebulae, high- velocity clouds, and dwarf spheroidal galaxies. The instrument is currently in the process of being relocated from Kitt Peak to the southern hemisphere where it will complete the all- sky Hα survey and continue to explore ionized gas in the southern skies. More details and the current status of the WHAM project can be found at http:www.astro.wisc.edu/wham/.

Key words.

Galaxy: halo – H II regions - ISM: atoms - ISM: structure

Send offprint requests to: G.J. Madsen

Riferimenti

Scarica adesso ( PDF - 1 pagine - 428.40 KB )

Documenti correlati

View of Interweaving Stories. Hamlet in Jerusalem by Gabriele Vacis and Marco Paolini

It is the story of how Hamlet by Shakespeare intermingled with a theatrical school that Vacis and Paolini directed in Jerusalem in 2008, and how the group (directors,

The hadronic vacuum polarization contribution to (gμ − 2): Lattice QCD+QED calculations

solid lines correspond to the results of the combined fits (8) obtained in the infinite-volume limit at each value of the lattice spacing. [15]), and to the continuum and

Search for the τ → μμμ decay at CMS

The former benefits from a large τ lepton production cross- section, due to the presence of b-type and c-type quarks, the latter from a stronger event signature, given by the large

Cannabis Hyperemesis Syndrome: A Still Under-Recognized Syndrome

Severe cyclic nausea and vomiting Resolution with cannabis cessation Relief of symptoms with hot showers or bath Abdominal pain, epigastric or periumbilical Weekly use of

Giant Lactating Adenoma – Size of a Shot Put Ball

We present a case of a 32-year-old pregnant patient who was re-referred to us with a progressively increasing left breast lesion, pre-existing prior to pregnancy, which was found to

View of REVISION OF THE FAMILY HEBETOECHIIDAE HAVLÍČEK, 1960, AND PROPOSAL OF THREE NEW RHYNCHONELLID (BRACHIOPOD) FAMILIES

None of these genera recently assigned to the family Hebetoechiidae seems to belong to it; only some of the reasons for exclusion (size, presence or absence of dental plates,

Guarda Lotman settecentista. Con bibliografia ragionata degli scritti lotmaniani sul Settecento. / Lotman as eighteenth-century scholar. With an annotated bibliography of Lotman's works on the eighteenth century.

Si noti, inoltre, che molti di questi titoli sono stati pubblicati in raccolte d’impianto semiotico: per alcune è evidente già dal titolo (Tipologia della cultura; Testo e

Guarda Strategie paratestuali nella lirica di Andrea Zanzotto

Ciascuno di questi elementi è riscontrabile anche nella lirica di Andrea Zanzotto, nella quale alcune tendenze sono portate addirittura all’esasperazione (si pensi soltanto