DISCOVERY AND FOLLOW-UP OF A NEARBY GALAXY FROM THE ARECIBO ZONE OF AVOIDANCE SURVEY

被引:6
|
作者
McIntyre, T. P. [1 ,2 ]
Minchin, R. F. [2 ]
Momjian, E. [3 ]
Henning, P. A. [1 ]
Kaur, A. [4 ]
Parton, B. [4 ]
机构
[1] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA
[2] Arecibo Observ, Arecibo, PR 00612 USA
[3] Domenici Sci Operat Ctr, NRAO, Socorro, NM 87801 USA
[4] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA
基金
美国国家航空航天局;
关键词
galaxies: individual (ALFA ZOA J1952+1428); radio lines: galaxies; surveys; COMPACT DWARF GALAXIES; LOCAL GROUP; HI; CATALOG;
D O I
10.1088/2041-8205/739/1/L26
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Arecibo L-Band Feed Array Zone of Avoidance (ALFA ZOA) Survey has discovered a nearby galaxy, ALFA ZOA J1952+1428, at a heliocentric velocity of +279 km s(-1). The galaxy was discovered at low Galactic latitude by 21 cm emission from neutral hydrogen (H-I). We have obtained follow-up observations with the Expanded Very Large Array and the 0.9 m Southeastern Association for Research in Astronomy optical telescope. The Hi distribution overlaps an uncataloged, potential optical counterpart. The H-I linear size is 1.4 kpc at our adopted distance of D = 7 Mpc, but the distance estimate is uncertain as Hubble's law is unreliable at low recessional velocities. The optical counterpart has m(B) = 16.9 mag and B - R = 0.1 mag. These characteristics, including M-HI = 10(7.0) M-circle dot and L-B = 10(7.5) L-circle dot, if at 7 Mpc, indicate that this galaxy is a blue compact dwarf, but this remains uncertain until further follow-up observations are complete. Optical follow-up observations are ongoing and near-infrared follow-up observations have been scheduled.
引用
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页数:5
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