2012AJ....143...37H

Query : 2012AJ....143...37H

2012AJ....143...37H - Astron. J., 143, 37 (2012/February-0)

Optical TiO and VO band emission in two embedded protostars: IRAS 04369+2539 and IRAS 05451+0037.

HILLENBRAND L.A., KNAPP G.R., PADGETT D.L., REBULL L.M. and McGEHEE P.M.

Abstract (from CDS):

Archival spectra from the Sloan Digital Sky Survey of two optically faint flat-spectrum protostars, IRAS 04369+2539 and IRAS 05451+0037, show strong emission-line features including–notably–clear and broad emission across several molecular bands of TiO and VO. The molecular emission is indicative of dense, warm circumstellar gas and has been seen previously in only one object: the flat-spectrum protostar IRAS 20496+4354 during a strong optical outburst (PTF 10nvg). The presence of broad molecular emission features in two additional objects having similar mid-infrared properties (but not known to be undergoing outbursts) could provide new insight into phases of rapid accretion/outflow at early stages of the protoplanetary disk. At present, the relevant geometry and the formation or heating mechanisms responsible for the observed TiO/VO cooling emission remain unexplained.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - infrared: stars - stars: formation - stars: individual (IRAS 04369+2539, IRAS 05451+0037) - stars: pre-main sequence

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V512 Per Or* 03 29 03.7578170808 +31 16 03.947525688           M3.5 419 0
2 V* DG Tau TT* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1092 1
3 IRAS 0437+257P08 Or* 04 39 55.7457478224 +25 45 01.941104988           B5 177 1
4 HH 395A HH 04 40 08.7 +25 46 44           ~ 4 0
5 HH 395B HH 04 40 11.0 +25 47 32           ~ 4 0
6 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
7 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1872 0
8 NAME Ori Complex Cld 05 35.3 -05 23           ~ 481 0
9 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 397 0
10 NGC 2071 RNe 05 47 10 +00 18.0           ~ 661 1
11 EM* LkHA 316 TT* 05 47 35.7628470408 +00 38 39.905526732     14.8     K6e 35 1
12 2MASS J05473676+0039145 Y*O 05 47 36.7685463000 +00 39 14.517666864     16.7     ~ 15 0
13 HH 473 HH 05 47 40.6 +00 37 59           ~ 3 0
14 NAME NGC 2071-North PoC 05 47 42.3 +00 38 40           ~ 17 0
15 IRAS 05451+0037 Y*O 05 47 45.0013267080 +00 38 41.903322468           ~ 40 0
16 HH 474 HH 05 47 46.3 +00 39 05           ~ 3 0
17 EM* LkHA 319 TT* 05 47 48.3650037144 +00 40 58.908661032     15.1     M0e 28 0
18 HD 325367 Or* 16 03 05.4915085848 -40 18 25.426727676   11.40 8.50     M0 406 0
19 V* V2492 Cyg Or* 20 51 26.2367188536 +44 05 23.869354488   20.2   18.3   F-GII/MI 107 0
20 NGC 7000 Cl* 20 58 47 +44 19.8           ~ 427 0
21 EM* LkHA 190 Or* 20 58 53.7335347296 +44 15 28.388727720   14.26 12.33 12.13   F7/G3I/IIe 530 0

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