The HI/OH/Recombination line survey of the inner Milky Way (THOR) Survey overview and data release 1

被引：126

作者：

Beuther, H. ^{[1
]}

Bihr, S. ^{[1
]}

Rugel, M. ^{[1
]}

Johnston, K. ^{[1
,2
]}

Wang, Y. ^{[1
]}

Walter, F. ^{[1
]}

Brunthaler, A. ^{[3
]}

Walsh, A. J. ^{[4
]}

Ott, J. ^{[5
]}

Stil, J. ^{[6
]}

Henning, Th. ^{[1
]}

Schierhuber, T. ^{[1
]}

Kainulainen, J. ^{[1
]}

Heyer, M. ^{[7
]}

Goldsmith, P. F. ^{[8
]}

Anderson, L. D. ^{[9
]}

Longmore, S. N. ^{[10
]}

Klessen, R. S.

Glover, S. C. O. ^{[11
]}

Urquhart, J. S. ^{[17
]}

Plume, R. ^{[6
]}

Ragan, S. E. ^{[2
]}

Schneider, N. ^{[12
]}

McClure-Griffiths, N. M. ^{[13
]}

Menten, K. M. ^{[3
]}

Smith, R. ^{[14
]}

Roy, N. ^{[15
]}

Shanahan, R.

Nguyen-Luong, Q. ^{[16
]}

Bigiel, F. ^{[11
]}

机构：

[1] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[2] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[3] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[4] Curtin Univ, Int Ctr Radio Astron Res, GPO Box U1987, Perth, WA 6845, Australia

[5] Natl Radio Astron Observ, POB O,1003 Lopezville Rd, Socorro, NM 87801 USA

[6] Univ Calgary, Dept Phys & Astron, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada

[7] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA

[8] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA

[9] West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA

[10] Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England

[11] Heidelberg Univ, Zentrum Astron, Inst Theoret Astrophys, Albert Ueberle Str 2, D-69120 Heidelberg, Germany

[12] Univ Cologne, Inst Phys 1, Zilpicher Str 77, D-50937 Cologne, Germany

[13] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT, Australia

[14] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England

[15] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

[16] Natl Astron Observ Japan, Chile Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[17] Univ Kent, Sch Phys Sci, Ingram Bldg, Canterbury CT2 7NH, Kent, England

来源：

ASTRONOMY & ASTROPHYSICS | 2016年 / 595卷

基金：

欧洲研究理事会;

关键词：

stars: formation; ISM: clouds; ISM: structure; ISM: kinematics and dynamics; ISM: magnetic fields; stars: evolution; GALACTIC PLANE SURVEY; INTERSTELLAR ATOMIC-HYDROGEN; GIANT MOLECULAR FILAMENTS; NARROW SELF-ABSORPTION; MASS STAR-FORMATION; DIFFUSE H I; COLUMN DENSITY; DISTANCE AMBIGUITY; CONTINUUM SOURCES; CLOUD EVOLUTION;

D O I：

10.1051/0004-6361/201629143

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The past decade has witnessed a large number of Galactic plane surveys at angular resolutions below 20 ''. However, no comparable high-resolution survey exists at long radio wavelengths around 21 cm in line and continuum emission. Aims. We remedy this situation by studying the northern Galactic plane at similar to 20 '' resolution in emission of atomic, molecular, and ionized gas. Methods. Employing the Karl G. Jansky Very Large Array (VLA) in the C-array configuration and a large program, we observe the HI 21 cm line, four OH lines, nineteen Hn alpha radio recombination lines as well as the continuum emission from 1 to 2 GHz in full polarization over a large part of the first Galactic quadrant. Results. Covering Galactic longitudes from 14.5 to 67.4 deg and latitudes between +/- 1.25 deg, we image all of these lines and the continuum at similar to 20 '' resolution. These data allow us to study the various components of the interstellar medium (ISM): from the atomic phase, traced by the HI line, to the molecular phase, observed by the OH transitions, to the ionized medium, revealed by the cm continuum and the Hn alpha radio recombination lines. Furthermore, the polarized continuum emission enables magnetic field studies. In this overview paper, we discuss the survey outline and present the first data release as well as early results from the different datasets. We now release the first half of the survey; the second half will follow later after the ongoing data processing has been completed. The data in fits format (continuum images and line data cubes) can be accessed through the project web-page. Conclusions. The HI/OH/Recombination line survey of the Milky Way (THOR) opens a new window to the different parts of the ISM. It enables detailed studies of molecular cloud formation, conversion of atomic to molecular gas, and feedback from HII regions as well as the magnetic field in the Milky Way. It is highly complementary to other surveys of our Galaxy, and comparing the different datasets will allow us to address many open questions.

引用

页数：21

共 113 条

[81] Detection of a large fraction of atomic gas not associated with star-forming material in M17 SW [J].

Perez-Beaupuits, J. P. ;

Stutzki, J. ;

Ossenkopf, V. ;

Spaans, M. ;

Guesten, R. ;

Wiesemeyer, H. .

ASTRONOMY & ASTROPHYSICS, 2015, 575

[82] The ionized and hot gas in M17 SW SOFIA/GREAT THz observations of [C II] and 12CO J=13-12 [J].

Perez-Beaupuits, J. P. ;

Wiesemeyer, H. ;

Ossenkopf, V. ;

Stutzki, J. ;

Guesten, R. ;

Simon, R. ;

Huebers, H. -W. ;

Ricken, O. .

ASTRONOMY & ASTROPHYSICS, 2012, 542

[83] THE EXPANDED VERY LARGE ARRAY: A NEW TELESCOPE FOR NEW SCIENCE [J].

Perley, R. A. ;

Chandler, C. J. ;

Butler, B. J. ;

Wrobel, J. M. .

ASTROPHYSICAL JOURNAL LETTERS, 2011, 739 (01)

[84] THE COORDINATED RADIO AND INFRARED SURVEY FOR HIGH-MASS STAR FORMATION. II. SOURCE CATALOG [J].

Purcell, C. R. ;

Hoare, M. G. ;

Cotton, W. D. ;

Lumsden, S. L. ;

Urquhart, J. S. ;

Chandler, C. ;

Churchwell, E. B. ;

Diamond, P. ;

Dougherty, S. M. ;

Fender, R. P. ;

Fuller, G. ;

Garrington, S. T. ;

Gledhill, T. M. ;

Goldsmith, P. F. ;

Hindson, L. ;

Jackson, J. M. ;

Kurtz, S. E. ;

Marti, J. ;

Moore, T. J. T. ;

Mundy, L. G. ;

Muxlow, T. W. B. ;

Oudmaijer, R. D. ;

Pandian, J. D. ;

Paredes, J. M. ;

Shepherd, D. S. ;

Smethurst, S. ;

Spencer, R. E. ;

Thompson, M. A. ;

Umana, G. ;

Zijlstra, A. A. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2013, 205 (01)

[85] Giant molecular filaments in the Milky Way [J].

Ragan, S. E. ;

Henning, Th ;

Tackenberg, J. ;

Beuther, H. ;

Johnston, K. G. ;

Kainulainen, J. ;

Linz, H. .

ASTRONOMY & ASTROPHYSICS, 2014, 568

[86]

Rau U., 2011, ASTRON ASTROPHYS, V532, P71

[87] TRIGONOMETRIC PARALLAXES OF HIGH MASS STAR FORMING REGIONS: THE STRUCTURE AND KINEMATICS OF THE MILKY WAY [J].

Reid, M. J. ;

Menten, K. M. ;

Brunthaler, A. ;

Zheng, X. W. ;

Dame, T. M. ;

Xu, Y. ;

Wu, Y. ;

Zhang, B. ;

Sanna, A. ;

Sato, M. ;

Hachisuka, K. ;

Choi, Y. K. ;

Immer, K. ;

Moscadelli, L. ;

Rygl, K. L. J. ;

Bartkiewicz, A. .

ASTROPHYSICAL JOURNAL, 2014, 783 (02)

[88] MASERS [J].

REID, MJ ;

MORAN, JM .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1981, 19 :231-276

[89] CHIMPS: the 13CO/C18O (J=3 → 2) Heterodyne Inner Milky Way Plane Survey [J].

Rigby, A. J. ;

Moore, T. J. T. ;

Plume, R. ;

Eden, D. J. ;

Urquhart, J. S. ;

Thompson, M. A. ;

Mottram, J. C. ;

Brunt, C. M. ;

Butner, H. M. ;

Dempsey, J. T. ;

Gibson, S. J. ;

Hatchell, J. ;

Jenness, T. ;

Kuno, N. ;

Longmore, S. N. ;

Morgan, L. K. ;

Polychroni, D. ;

Thomas, H. ;

White, G. J. ;

Zhu, M. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 456 (03) :2885-2899

[90] The temperature of the diffuse H i in the Milky Way - I. High resolution H i-21 cm absorption studies [J].

Roy, Nirupam ;

Kanekar, Nissim ;

Braun, Robert ;

Chengalur, Jayaram N. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2013, 436 (03) :2352-2365

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