New Young Planetary Nebulae in IPHAS

Details New Young Planetary Nebulae in IPHAS New Young Planetary Nebulae in IPHAS

2009-04-13

arxiv.org/abs/0904.1937v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

18 pages, 15 figures

Scientific paper

We search for very small-diameter galactic planetary nebulae (PNe) representing the earliest phases of PN evolution. A recently published IPHAS catalogue of Ha-emitting stars provides a useful base for this study as all sources present in this catalogue must be of small angular diameter. The PN candidates are selected based on their location in two colour-colour diagrams: IPHAS (r' - Ha) vs. (r' - i'), and 2MASS (J - H) vs. (H - Ks). Spectroscopic follow-up has been carried out on a sample of candidates in order to confirm their nature. We present a total of 83 PN candidates. We were able to obtain spectra or find the classification from the literature for 35 candidates. Five of these objects are likely to be new PNe, including one large bipolar PN discovered serendipitously near an emission-line star. PN distances deduced from extinction-distance relations based on IPHAS field-star photometry are presented for the first time. These yield distance estimates for our objects in the range from 2 kpc to 6 kpc. From the data to hand, we conclude that four of the discovered objects are very probably young PNe.

Affiliated with

Also associated with

No associations

Rating

New Young Planetary Nebulae in IPHAS does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with New Young Planetary Nebulae in IPHAS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Young Planetary Nebulae in IPHAS will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-324322