The Kinematics of Arp 295 in H-alpha Emission: an Interacting Galaxy with Highly Asymmetric Rotation
| dc.creator | Roche, Nathan | |
| dc.date | 2006-10-13 | |
| dc.date | 2006-12-12 | |
| dc.date.accessioned | 2026-07-07T07:26:57Z | |
| dc.date.available | 2026-07-07T07:26:57Z | |
| dc.description | We investigate Arp 295, a pair of interacting spirals at z=0.023. We measure scalelengths 5.24 kpc for Arp 295a and 2.52 kpc for 295b. There is a much smaller Im galaxy associated with the larger spiral. Arp 295b is asymmetric with the disk more extended eastwards but with the brightest star-formation regions on the west side of the nucleus. The spectrum of Arp 295b shows strong emission lines with [OII]3727 prominent. We measure the total H-alpha line luminosities of Arp 295b and Arp 295c as 4.69x 10^{41} and 6.76x 10^{40} ergs/s, corresponding to star-formation rates 3.7 and 0.53 solar masses/year. We map the kinematics of Arp 295b in H-alpha with the Manchester Echelle Spectrograph. The maximum disk rotation velocity is 252.6 km/s. The rotation curve of Arp 295b is very asymmetric. The east (approaching) side has a higher radial velocity than the west with the maximum difference 5 arcsec from the nucleus, where it is 88 km/s or a factor 1.675. The slowed rotation on the western side of the nucleus may have locally enhanced star-formation. | |
| dc.description | 11 pages, 10 figures, revised version. Rev Mex Ast, in press. To appear vol 43, no. 1, April 2007 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0610426 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0610426 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/117215 | |
| dc.subject | Astrophysics | |
| dc.title | The Kinematics of Arp 295 in H-alpha Emission: an Interacting Galaxy with Highly Asymmetric Rotation | |
| dc.type | text |