The Nearby Dwarf Irregular Galaxy IC 1613 and Its Complex Bubble Region: Chandra and VLA Observations

被引:1
|
作者
Schlegel, E. M. [1 ]
Lacey, C. K. [2 ]
Pannuti, Thomas G. [3 ]
Lozinskaya, T. [4 ]
Moiseev, A. [4 ,5 ]
机构
[1] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA
[2] Hofstra Univ, Hempstead, NY 11549 USA
[3] Morehead State Univ, Space Sci Ctr, Dept Phys Earth Sci & Space Syst Engn, 235 Martindale Dr, Morehead, KY 40351 USA
[4] Sternberg Astron Inst, Moscow 119992, Russia
[5] Russian Acad Sci, Space Res Inst, Profsoyuznaya Ul 84-32, Moscow 117997, Russia
来源
ASTRONOMICAL JOURNAL | 2022年 / 163卷 / 02期
基金
美国国家航空航天局;
关键词
X-RAY-EMISSION; STAR-FORMATION RATE; ARRAY CAMERA IRAC; H-II REGIONS; MULTIWAVELENGTH PROJECT; SUPERNOVA-REMNANTS; FORMING GALAXIES; RADIO SEARCH; MASS; CATALOG;
D O I
10.3847/1538-3881/ac356b
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We observed the nearby irregular galaxy IC 1613 with the Chandra X-ray Observatory, for 49.9 ks using the ACIS S3 chip, and with the VLA at 6 cm for 0.7 hr. The Chandra observation targeted the extensive bubble region in the northeast quadrant. We detect 31 sources within the D (25) diameter above a significance of 3 sigma corresponding to a point-source luminosity limit L (X) of approximate to 2 x 10(35) erg s(-1) (0.3-8 keV band). The VLA observation covered the entire galaxy with an angular resolution of 5 ''. We detect 11 sources: five do not fall on the ACIS chips, four fall on the S3 CCD, and two sit on the edge of the S2 CCD. We also describe corresponding Spitzer IRAC and MIPS images. Our detected source list matches the lists of two previous global point-source analyses except at the faint end. With the exception of one bright supernova remnant, the sources appear to be low-luminosity stellar sources (e.g., RS CVn stars) or X-ray binaries, or background objects. We identify one candidate supersoft source. All but one of the sources have at least one optical or infrared counterpart; three sources have radio counterparts. We describe our search for diffuse emission from the bubble region. We assign an upper limit of approximate to 5 x 10(35) erg s(-1) on the integrated flux and approximate to 1.4 x 10(30) erg s(-1) pc(-2) on the surface brightness emission in the 0.5-2 keV band from that region.
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页数:23
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