VARIATIONS BETWEEN DUST AND GAS IN THE DIFFUSE INTERSTELLAR MEDIUM. II. SEARCH FOR COLD GAS

被引：12

作者：

Reach, William T. ^{[1
]}

Heiles, Carl ^{[2
]}

Bernard, Jean-Philippe ^{[3
]}

机构：

[1] Univ Space Res Assoc, MS 232-11, Moffett Field, CA 94035 USA

[2] Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA

[3] Univ Toulouse, Inst Rech Astrophys & Planetol, F-31028 Toulouse 4, France

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 834卷 / 01期

关键词：

ISM: atoms; ISM: clouds; ISM: general; ISM: molecules; DARK MOLECULAR GAS; H-I; MILKY-WAY; EMISSION; EXTINCTION; ABSORPTION; EVOLUTION; CLOUDS; H-2;

D O I：

10.3847/1538-4357/834/1/63

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The content of interstellar clouds, in particular the inventory of diffuse molecular gas, remains uncertain. We identified a sample of isolated clouds, approximately 100Me in size, and used the dust content to estimate the total amount of gas. In Paper I, the total inferred gas content was found significantly larger than that seen in 21 cm emission measurements of H I. In this paper we test the hypothesis that the apparent excess "dark" gas is cold H I, which would be evident in absorption but not in emission due to line saturation. The results show that there is not enough 21 cm absorption toward the clouds to explain the total amount of "dark" gas.

引用

页数：7

共 28 条

[1] Planck early results. I. The Planck mission [J].

Ade, P. A. R. ;

Aghanim, N. ;

Arnaud, M. ;

Ashdown, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Baker, M. ;

Balbi, A. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Battaner, E. ;

Benabed, K. ;

Bennett, K. ;

Benoit, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bhatia, R. ;

Bock, J. J. ;

Bonaldi, A. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Bradshaw, T. ;

Bremer, M. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Cabella, P. ;

Cantalupo, C. M. ;

Cappellini, B. ;

Cardoso, J. -F. ;

Carr, R. ;

Casale, M. ;

Catalano, A. ;

Cayon, L. ;

Challinor, A. ;

Chamballu, A. ;

Charra, J. ;

Chary, R. -R. ;

Chiang, L. -Y. ;

Chiang, C. ;

Christensen, P. R. ;

Clements, D. L. ;

Colombi, S. ;

Couchot, F. ;

Coulais, A. ;

Crill, B. P. ;

Crone, G. ;

Crook, M. .

ASTRONOMY & ASTROPHYSICS, 2011, 536

[2] THE STRUCTURE OF DARK MOLECULAR GAS IN THE GALAXY. I. A PILOT SURVEY FOR 18 cm OH EMISSION TOWARD l ≈ 105°, b ≈+1° [J].

Allen, Ronald J. ;

Hogg, David E. ;

Engelke, Philip D. .

ASTRONOMICAL JOURNAL, 2015, 149 (04)

[3] Spitzer survey of the Large Magellanic Cloud, Surveying the Agents of a Galaxy's Evolution (sage). IV. Dust properties in the interstellar medium [J].

Bernard, Jean-Philippe ;

Reach, William T. ;

Paradis, Deborah ;

Meixner, Margaret ;

Paladini, Roberta ;

Kawamura, Akiko ;

Onishi, Toshikazu ;

Vijh, Uma ;

Gordon, Karl ;

Indebetouw, Remy ;

Hora, Joseph L. ;

Whitney, Barbara ;

Blum, Robert ;

Meade, Marilyn ;

Babler, Brian ;

Churchwell, Ed B. ;

Engelbracht, Charles W. ;

For, Bi-Qing ;

Misselt, Karl ;

Leitherer, Claus ;

Cohen, Martin ;

Boulandger, Francois ;

Frogel, Jay A. ;

Fukui, Yasuo ;

Gallagher, Jay ;

Gorjian, Varoujan ;

Harris, Jason ;

Kelly, Douglas ;

Latter, William B. ;

Madden, Suzanne ;

Markwick-Kemper, Ciska ;

Mizuno, Akira ;

Mizuno, Norikazu ;

Mould, Jeremy ;

Nota, Antonella ;

Oey, M. S. ;

Olsen, Knut ;

Panagia, Nino ;

Perez-Gonzalez, Pablo ;

Shibai, Hiroshi ;

Sato, Shuji ;

Smith, Linda ;

Staveley-Smith, Lister ;

Tielens, A. G. G. M. ;

Ueta, Toshiya ;

Van Dyk, Schuyler ;

Volk, Kevin ;

Werner, Michael ;

Zaritsky, Dennis .

ASTRONOMICAL JOURNAL, 2008, 136 (03) :919-945

[4] The NRAO VLA Sky Survey [J].

Condon, JJ ;

Cotton, WD ;

Greisen, EW ;

Yin, QF ;

Perley, RA ;

Taylor, GB ;

Broderick, JJ .

ASTRONOMICAL JOURNAL, 1998, 115 (05) :1693-1716

[5] The three-phase interstellar medium revisited [J].

Cox, DP .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 2005, 43 :337-385

[6] THE OUTER DISK OF THE MILKY WAY SEEN IN λ21 cm ABSORPTION [J].

Dickey, John M. ;

Strasser, Simon ;

Gaensler, B. M. ;

Haverkorn, Marijke ;

Kavars, Dain ;

McClure-Griffiths, N. M. ;

Stil, Jeroen ;

Taylor, A. R. .

ASTROPHYSICAL JOURNAL, 2009, 693 (02) :1250-1260

[7] OPTICALLY THICK Hi DOMINANT IN THE LOCAL INTERSTELLAR MEDIUM: AN ALTERNATIVE INTERPRETATION TO "DARK GAS" [J].

Fukui, Y. ;

Torii, K. ;

Onishi, T. ;

Yamamoto, H. ;

Okamoto, R. ;

Hayakawa, T. ;

Tachihara, K. ;

Sano, H. .

ASTROPHYSICAL JOURNAL, 2015, 798 (01)

[8] CO-dark gas and molecular filaments in Milky Way-type galaxies - II. The temperature distribution of the gas [J].

Glover, Simon C. O. ;

Smith, Rowan J. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 462 (03) :3011-3025

[9] Unveiling extensive clouds of dark gas in the solar neighborhood [J].

Grenier, IA ;

Casandjian, JM ;

Terrier, R .

SCIENCE, 2005, 307 (5713) :1292-1295

[10] MOLECULES, GRAINS, AND SHOCKS - A COMPARISON OF CO, H-I, AND IRAS DATA [J].

HEILES, C ;

REACH, WT ;

KOO, BC .

ASTROPHYSICAL JOURNAL, 1988, 332 (01) :313-327

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