A CATALOG OF EXTENDED GREEN OBJECTS IN THE GLIMPSE SURVEY: A NEW SAMPLE OF MASSIVE YOUNG STELLAR OBJECT OUTFLOW CANDIDATES

被引：372

作者：

Cyganowski, C. J. ^{[1
]}

Whitney, B. A. ^{[2
]}

Holden, E. ^{[1
]}

Braden, E. ^{[1
]}

Brogan, C. L. ^{[3
]}

Churchwell, E. ^{[1
]}

Indebetouw, R. ^{[3
,4
]}

Watson, D. F. ^{[5
]}

Babler, B. L. ^{[1
]}

Benjamin, R. ^{[6
]}

Gomez, M. ^{[7
]}

Meade, M. R. ^{[1
]}

Povich, M. S. ^{[1
]}

Robitaille, T. P. ^{[8
]}

Watson, C. ^{[9
]}

机构：

[1] Univ Wisconsin, Madison, WI 53706 USA

[2] Space Sci Inst, Boulder, CO 80301 USA

[3] NRAO, Charlottesville, VA 22903 USA

[4] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA

[5] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[6] Univ Wisconsin, Dept Phys, Whitewater, WI 53190 USA

[7] Univ Nacl Cordoba, Astron Observ, RA-5000 Cordoba, Argentina

[8] Univ St Andrews, Sch Phys & Astron, Scottish Univ Phys Alliance, St Andrews, Fife, Scotland

[9] Manchester Coll, Dept Phys, N Manchester, IN 46962 USA

来源：

ASTRONOMICAL JOURNAL | 2008年 / 136卷 / 06期

基金：

美国国家科学基金会;

关键词：

infrared: ISM; infrared: stars; ISM: jets and outflows; stars: formation;

D O I：

10.1088/0004-6256/136/6/2391

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using images from the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE), we have identified more than 300 extended 4.5 mu m sources (Extended Green Objects (EGOs), for the common coding of the [4.5] band as green in three-color composite InfraRed Array Camera images). We present a catalog of these EGOs, including integrated flux density measurements at 3.6, 4.5, 5.8, 8.0, and 24 mu m from GLIMPSE and the Multiband Imaging Photometer for Spitzer Galactic Plane Survey. The average angular separation between a source in our sample and the nearest IRAS point source is greater than 1'. The majority of EGOs are associated with infrared dark clouds (IRDCs), and where high-resolution 6.7 GHz CH3OH maser surveys overlap the GLIMPSE coverage, EGOs and 6.7 GHz CH3OH masers are strongly correlated. Extended 4.5 mu m emission is thought to trace shocked molecular gas in protostellar outflows; the association of EGOs with IRDCs and 6.7 GHz CH3OH masers suggests that the extended 4.5 mu m emission may pinpoint outflows specifically from massive protostars. The mid-IR colors of EGOs lie in regions of color-color space occupied by young protostars still embedded in infalling envelopes.

引用

页码：2391 / 2412

页数：22

共 40 条

[1] An H2Co 6 cm maser pinpointing a possible circumstellar torus in IRAS 18566+0408 [J].